Original indicator solution from Heyl for precise measurement of residual hardness in water with the Testomat 808. Conveniently supplied in 2 x 100 ml bottles. For 100 ml bottles, the conversion kit (Item No. 40143) is required to use the indicators correctly. Testomat® 808 Indicator 300 – Liquid Solution for Precise Residual Hardness Measurements Reliable residual hardness measurement with the original indicator solution The indicator solution is specially calibrated for monitoring residual hardness with the Testomat 808 or Testomat F-BOB. With a threshold of 0.02 °dH, it provides meaningful residual hardness readings and ensures that plant processes are correctly monitored. With a guaranteed minimum shelf life of 7 months after shipment from our warehouse, the indicator solution remains accurate and ready for use throughout this period. Features of the Testomat 808 Indicator Type 300 With precise reaction at a low threshold of 0.02 °dH, the indicator solution is ideal for continuous use in the Testomat 808. The practical 2 x 100 ml packaging allows easy handling and storage. Only by using the original 808 indicator can proper device function be ensured, along with the corresponding device warranty. Frequently asked questions How long does the indicator/reagent keep? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators - Consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. To use 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming, and the screw cap with hole and insert for the indicator must also be purchased (item no. 40143). Where can I find the safety data sheet? The safety data sheets can be found in the online shop (www.heylneomeris.shop) under the menu item – Service/Help – Downloads Safety Data Sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. What is the optimum storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15-25°C. Device warranty / guarantee Measurement errors when using third-party indicators! The use of third-party indicators can lead to large measurement deviations or measurement errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

Original 500 ml bottle with indicator solution from Heyl for measuring residual hardness in water. Suitable for the Testomat 808 and Testomat F-BOB with a limit value of 0.02 °dH. 500 ml indicator for precise residual hardness measurement in the Testomat 808 from Heyl High-quality liquid solution for precise detection of very low residual hardness The Testomat 808 Indicator 300 in a 500 ml bottle is an indicator developed by Heyl for determining extremely low residual hardness in water. With a limit value of 0.02 °dH, it is ideal for detecting the slightest differences in hardness. Our customers appreciate the 500 ml bottle size, as it significantly reduces the effort required for refilling. Advantages of measuring residual hardness with a 500 ml volume Compared to the 100 ml bottle, the 500 ml bottle offers a larger supply of indicator solution and is particularly suitable for frequent or long-term measurement intervals. Important product data at a glance Measurement parameter: Residual hardness in water Limit value: 0.02 °dH – highly sensitive setting for the finest hardness ranges Container size: 500 ml original indicator solution Compatible with: Testomat 808 and Testomat F-BOB Advantages: reduced refill requirements, stable chemical reaction, suitable for continuous online monitoring of water hardness Areas of application: water supply systems, boiler feed water control, plant engineering, reverse osmosis processes

Original indicator solution from Heyl for measuring residual hardness with the Testomat 808 and F-BOB. Supplied in 2 x 100 ml bottles for precise water analysis. For 100 ml bottles, the conversion kit (Item No. 37580) is required to use the indicators correctly. Residual Hardness Indicator Solution 300 S for Precise Measurement with Testomat 808 Reliable liquid solution for monitoring residual hardness With a threshold of 0.05 °dH, this indicator solution is particularly suitable for applications where a slightly higher residual hardness threshold is relevant. The liquid formulation ensures easy dosing and reliable measurement results during continuous analyses. With a guaranteed minimum shelf life of 7 months after shipment from our warehouse, the indicator solution remains accurate and ready for use throughout this period. The 300 S indicator solution is suitable for use with the Testomat 808 and F-BOB device series from Heyl and is designed for threshold measurement. Applications of the Indicator Solution Water treatment Industrial processes Reverse osmosis and boiler feed water monitoring Frequently asked questions How long does the indicator/reagent keep? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators - Consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. To use 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming, and the screw cap with hole and insert for the indicator must also be purchased (item no. 40143). Where can I find the safety data sheet? The safety data sheets can be found in the online shop (www.heylneomeris.shop) under the menu item – Service/Help – Downloads Safety Data Sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. What is the optimum storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15-25°C. Device warranty / guarantee Measurement errors when using third-party indicators! The use of third-party indicators can lead to large measurement deviations or measurement errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

Original 500 ml indicator solution for measuring residual hardness in water with the Testomat 808 or F-BOB, calibrated to a limit value of 0.05 °dH for reliable analyses. 500 ml residual hardness indicator 300 S for Testomat 808 Liquid solution for precise detection of residual hardness in water The Testomat 808 indicator 300 S was designed by Heyl for applications in which defined residual hardness thresholds must be reliably monitored. With a fixed limit value of 0.05 °dH, this indicator is intended for technical water systems in which controlled, consistent water quality is crucial. The 500 ml bottle supports continuous use in automated measurement processes and reduces interruptions during operation. Defined residual value limits in continuous operation With a fixed limit value of 0.05 °dH, the indicator supports applications that require precise monitoring of low, but not very low, residual hardness ranges. In combination with the Testomat 808, it enables consistent control of water quality over longer operating periods. Important applications and properties Measured variable: Residual hardness in water Active limit value: 0.05 °dH – tailored to medium hardness ranges Compatible with: Testomat 808 and Testomat F-BOB Contents per bottle: 500 ml original indicator solution Advantages: less frequent refilling, clear measurement reaction, easy integration Fields of application: water supply, process water monitoring, boiler feed water, technical water systems

Residual Hardness Measurement with Testomat 808 – Indicator Solution Type 301 for Stable Analysis Results Original liquid chemistry from Heyl for residual hardness monitoring in technical water analysis With a threshold of 0.1 °dH, this indicator solution provides a reliable and precise reading of residual hardness, ideal for processes requiring continuous water monitoring. The liquid formulation allows easy handling and a dependable chemical reaction directly in the measuring device. Heyl's original indicator solution is suitable for use with the Testomat 808 and F-BOB series. With a guaranteed minimum shelf life of 7 months after shipment from our warehouse, the solution remains accurate and ready for use throughout the entire period. Features of Indicator 302 At a defined residual hardness threshold of 0.1 °dH, the indicator solution reacts reliably, making it a stable choice for medium hardness ranges. The bottles can be used directly in the device. The indicator ensures consistent dosing and reliable results over many measurement cycles. Applications of the Indicator Solution Boiler feed water monitoring Process water Reverse osmosis systems and technical supply systems

Testomat 808 Indicator 301 – Precise Measurement Original indicator solution, reliable determination of residual hardness in water The Testomat 808 Indicator 301, 500 ml bottle from Heyl, is an original indicator for the exact measurement of residual hardness with a threshold of 0.1 °dH. Suitable for the Testomat 808 and Testomat F-BOB devices. The Indicator 301 is reliable for monitoring residual hardness. It allows safe process control with minimal maintenance effort. Highly Precise Residual Hardness Determination The Testomat 808 Indicator 301 from Heyl is a specially developed original indicator for highly precise determination of residual hardness in water treatment systems. It is precisely calibrated to the measurement methodology of the Testomat 808 and Testomat F-BOB and ensures reliable detection of residual hardness up to a threshold of 0.1 °dH. Using the original Heyl indicator guarantees consistent measurement quality, as reaction behavior, color change, and stability are optimized for the device parameters. Only by using the original Testomat 808 Indicator can proper device functionality be ensured and the corresponding device warranty maintained. Häufige Fragen How long does the indicator/reagent last? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. For operation with 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming and the screw cap with hole and insert for the indicator must also be purchased. For Testomat 808 devices, the conversion kit (item no. 37580) must be purchased for the use of 100 ml indicator bottles, and for Testomat 808 SiO2 devices, the insert with screw cap and suction tube (item no. 37645) and the hose connector ø 3.5 mm (item no. 37643) must be purchased. For all other Heylwelt Testomat devices, please use the conversion kit with item no. 40143. Where can I find the safety data sheet? The safety data sheets can be found in the online shop (www.heylneomeris.shop) under the menu item – Service/Help – Downloads – Safety data sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. What is the optimum storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15-25°C. Device warranty / guarantee Measurement errors when using third-party indicators! The use of third-party indicators can lead to large measurement deviations or measurement errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

The Testomat 808 Indicator 302 for measuring residual hardness in water with the Testomat 808. Supplied in practical 2 x 100 ml bottles for stable and reliable results. For 100 ml bottles, the conversion kit (Item No. 37580) is required to use the indicators correctly. Testomat 808 Indicator 302 – Reliable Liquid Indicator for Medium Residual Hardness Fast and accurate residual hardness measurement in water The Testomat 808 Indicator 302 solution is specially developed for precise residual hardness measurement in the medium range. With a threshold of 0.2 °dH, it provides clear measurement results and enables reliable monitoring of process water and boiler feed water. Applications of Indicator 302 Thanks to its precise reaction at a medium residual hardness of 0.2 °dH, this indicator solution delivers consistent results. It is suitable for continuous use in industrial water treatment processes and ensures reliable measurement outcomes. Diverse Applications for the Testomat 808 Indicator 302 Process water Boiler feed water Reverse osmosis Technical water systems Frequently asked questions How long does the indicator/reagent keep? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators - Consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. To use 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming, and the screw cap with hole and insert for the indicator must also be purchased (item no. 40143). Where can I find the safety data sheet? The safety data sheets can be found in the online shop (www.heylneomeris.shop) under the menu item – Service/Help – Downloads Safety Data Sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. What is the optimum storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15-25°C. Device warranty / guarantee Measurement errors when using third-party indicators! The use of third-party indicators can lead to large measurement deviations or measurement errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

Testomat® 808 Indicator 302 500 ml Residual hardness threshold: 0.2 °dH for Testomat® 808 The Testomat 808 Indicator 302, 500 ml bottle, is designed for threshold monitoring of residual hardness at 0.2 °dH in water samples through color change. Indicator 302 enables precise measurement of residual hardness. It is optimized for the Testomat 808 and F-BOB to detect limescale deposits early. Precise Residual Hardness Monitoring at 0.2 °dH The Testomat® 808 Indicator 302 is a specially calibrated original indicator for reliable threshold monitoring of residual hardness in water samples at 0.2 °dH. The indicator solution is specifically designed for use with the Testomat® 808 and Testomat® F-BOB, enabling precise water hardness measurement through a clearly defined color change. Even the smallest deviations can be detected early, effectively preventing limescale deposits in downstream systems. Manufacturer Warranty and Original Indicators Full operational reliability and warranty claims for Testomat® devices can only be guaranteed when using original indicators. Using the original Indicator 302 ensures that measurement accuracy, device protection, and long-term reliability meet the manufacturer’s specifications. Häufige Fragen How long does the indicator/reagent last? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. For operation with 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming and the screw cap with hole and insert for the indicator must also be purchased. For Testomat 808 devices, the conversion kit (item no. 37580) must be purchased for the use of 100 ml indicator bottles, and for Testomat 808 SiO2 devices, the insert with screw cap and suction tube (item no. 37645) and the hose connector ø 3.5 mm (item no. 37643) must be purchased. For all other Heylwelt Testomat devices, please use the conversion kit with item no. 40143. Where can I find the safety data sheet? The safety data sheets can be found in the online shop (www.heylneomeris.shop) under the menu item – Service/Help – Downloads – Safety data sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. What is the optimum storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15-25°C. Device warranty / guarantee Measurement errors when using third-party indicators! The use of third-party indicators can lead to large measurement deviations or measurement errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

Testomat 808 Indicator 303 – Precise Residual Hardness Measurement Original indicator solution for determining residual hardness The Testomat 808 Indicator 303, 500 ml bottle from Heyl, is an original indicator solution for measuring residual hardness through color change with the Testomat 808 and Testomat F-BOB. It provides clear results at a threshold of 0.1 °dH. Indicator 303 is designed for residual hardness monitoring. With minimal maintenance, it enables safe process control. Highly Precise Residual Hardness Monitoring The Testomat 808 Indicator 303 from Heyl is a specially developed original indicator solution for precise measurement of residual hardness in water samples through a clearly defined color change. It is optimally calibrated for use with the Testomat 808 and Testomat F-BOB and delivers reliable measurement results at a threshold of 0.1 °dH. Thanks to its exact adaptation to the measurement methodology of the devices, it ensures high measurement accuracy and reproducibility. Deviations can be detected early, effectively preventing limescale formation. Manufacturer Warranty and Original Indicators The manufacturer’s warranty for Testomat® devices can only be guaranteed when using Heyl original indicators. Häufige Fragen How long does the indicator/reagent last? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: I Indicators consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. For operation with 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming and the screw cap with hole and insert for the indicator must also be purchased. For Testomat 808 devices, the conversion kit (item no. 37580) must be purchased for the use of 100 ml indicator bottles, and for Testomat 808 SiO2 devices, the insert with screw cap and suction tube (item no. 37645) and the hose connector ø 3.5 mm (item no. 37643) must be purchased. For all other Heylwelt Testomat devices, please use the conversion kit with item no. 40143. Where can I find the safety data sheet? The safety data sheets can be found in the online shop (www.heylneomeris.shop) under the menu item – Service/Help – Downloads – Safety data sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. What is the optimum storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15-25°C. Device warranty / guarantee Measurement errors when using third-party indicators! The use of third-party indicators can lead to large measurement deviations or measurement errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

High-quality original indicator solution from Heyl for determining residual hardness in water with the Testomat 808 and F-BOB. Supplied as a 2 x 100 ml set for robust measurements. For 100 ml bottles, the conversion kit (Item No. 37580) is required to use the indicators correctly. Liquid Indicator 303 for Residual Hardness Monitoring with Testomat 808 Efficient residual hardness analysis with a clearly defined reaction The Testomat 808 Indicator 303 solution is specially designed for monitoring residual hardness in the medium measurement range and provides a defined reaction at a threshold of 0.3 °dH. Due to its reliable chemical reaction, this indicator is particularly suitable for industrial water monitoring where consistent and reproducible results are required. Practical Use of Indicator 303 The indicator is calibrated for the medium range of residual hardness measurement and delivers stable signals even from small bottles. Where a threshold of 0.3 °dH is critical, it supports monitoring of residual hardness in water processes. Diverse Applications of the Indicator Technical water supply Boiler and process water monitoring Reverse osmosis checks Frequently asked questions How long does the indicator/reagent keep? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators - Consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. To use 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming, and the screw cap with hole and insert for the indicator must also be purchased (item no. 40143). Where can I find the safety data sheet? The safety data sheets can be found in the online shop (www.heylneomeris.shop) under the menu item – Service/Help – Downloads Safety Data Sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. What is the optimum storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15-25°C. Device warranty / guarantee Measurement errors when using third-party indicators! The use of third-party indicators can lead to large measurement deviations or measurement errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

Liquid original indicator solution from Heyl for measuring residual hardness in water with the Testomat 808 and F-BOB device series. Supplied in a practical 2 x 100 ml set with a threshold of 0.5 °dH. For 100 ml bottles, the conversion kit (Item No. 37580) is required to use the indicators correctly. Testomat 808 Indicator 305 – Reliable Residual Hardness Testing at 0.5 °dH High-quality solution for precise residual hardness measurement in water processes This indicator reacts clearly and reliably at a defined threshold of 0.5 °dH in the 808 and F-BOB devices. This allows safe decisions regarding water quality. The solution ensures consistent reaction and facilitates easy handling. Why is this indicator particularly suitable? With its clear reaction threshold of 0.5 °dH, it offers a good balance between sensitivity and robustness. The formulation is optimized for reliable use in online water analysis systems for industrial applications. Typical Applications of Indicator 305 Boiler feed water monitoring Process water analysis Technical water treatment systems Frequently asked questions How long does the indicator/reagent keep? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators - Consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. To use 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming, and the screw cap with hole and insert for the indicator must also be purchased (item no. 40143). Where can I find the safety data sheet? The safety data sheets can be found in the online shop (www.heylneomeris.shop) under the menu item – Service/Help – Downloads Safety Data Sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. What is the optimum storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15-25°C. Device warranty / guarantee Measurement errors when using third-party indicators! The use of third-party indicators can lead to large measurement deviations or measurement errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

The Testomat 808 Indicator 305, 500 ml bottle, is an original indicator solution for measuring residual hardness with a threshold of 0.5 °dH. The indicator is specially designed for Testomat 808 and Testomat F-BOB devices, providing precise and reliable measurement results. Benefits of the Original Testomat 808 Indicator 305 from Heyl The Testomat 808 Indicator 305 is optimally matched to the requirements of Testomat 808 and Testomat F-BOB devices and ensures reliable results during continuous operation. Your Advantages When Using Original Heyl Indicators at a Glance Maximum Measurement Accuracy: Precisely defined composition for reproducible and accurate residual hardness measurements. Perfect Device Compatibility: 100 % matched to Testomat 808 and Testomat F-BOB – no calibration issues or incorrect measurements. Reliable Process Monitoring: Ideal for continuous monitoring of residual hardness. System Protection: Early and reliable detection of limit value exceedances protects downstream processes and components. Warranty and Safety Through Original Heyl Quality Using the original Testomat 808 Indicator 305 ensures that the manufacturer-specified measurement accuracy, functional safety, and device lifespan are fully maintained. Using original indicators is a prerequisite for: proper operation of Testomat measuring devices maintaining warranty and guarantee claims compliant and reliable process control With the original indicator, you invest in measurement reliability, process stability, and long-term operational safety – without compromise. Häufige Fragen How long does the indicator/reagent last? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. For operation with 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming and the screw cap with hole and insert for the indicator must also be purchased. For Testomat 808 devices, the conversion kit (item no. 37580) must be purchased for the use of 100 ml indicator bottles, and for Testomat 808 SiO2 devices, the insert with screw cap and suction tube (item no. 37645) and the hose connector ø 3.5 mm (item no. 37643) must be purchased. For all other Heylwelt Testomat devices, please use the conversion kit with item no. 40143. Where can I find the safety data sheet? The safety data sheets can be found in the online shop (www.heylneomeris.shop) under the menu item – Service/Help – Downloads – Safety data sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. What is the optimum storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15-25°C. Device warranty / guarantee Measurement errors when using third-party indicators! The use of third-party indicators can lead to large measurement deviations or measurement errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

Original Testomat 808 Indicator 310 from Heyl for Residual Hardness Monitoring Residual hardness threshold: 1 °dH for Testomat 808 and F-BOB The Testomat 808 Indicator 310, 500 ml bottle, measures the residual hardness in water as a threshold monitor with color change for the Testomat 808 and F-BOB. The threshold is set at 1 °dH. The Indicator 310 enables reliable threshold measurement of residual hardness through a color reaction. Benefits of the Original Testomat 808 Indicator 310 The Testomat 808 Indicator 310 is the original indicator solution from Heyl for monitoring residual hardness in water with a threshold of 1 °dH. Its clearly defined color change ensures safe and easily readable measurement results on the Testomat 808 and F-BOB devices. Your Advantages When Using Heyl Original Indicators for Testomat 808 at a Glance Reliable Threshold Measurement: Clear indication via green or red signal for safe detection of residual hardness exceeding 1 °dH. Optimized for the Measuring Device: Specifically designed for Testomat 808 and Testomat F-BOB – ensures trouble-free operation and precise results. High Process Reliability: Ideal for continuous monitoring of residual hardness in water-carrying processes. Consistent Indicator Quality: Ensures reproducible results throughout the entire usage period. Warranty and Operational Safety with Original Indicator 310 for Testomat 808 from Heyl Using the original Testomat 808 Indicator 310 is crucial for reliable measurement function and proper operation of the Testomat devices. Using original indicators ensures: compliance with manufacturer specifications full measurement accuracy and operational reliability retention of warranty and guarantee claims long-term protection for downstream systems With the original Testomat 808 Indicator 310, you rely on dependable threshold monitoring, stable processes, and maximum operational safety. Häufige Fragen How long does the indicator/reagent last? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. For operation with 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming and the screw cap with hole and insert for the indicator must also be purchased. For Testomat 808 devices, the conversion kit (item no. 37580) must be purchased for the use of 100 ml indicator bottles, and for Testomat 808 SiO2 devices, the insert with screw cap and suction tube (item no. 37645) and the hose connector ø 3.5 mm (item no. 37643) must be purchased. For all other Heylwelt Testomat devices, please use the conversion kit with item no. 40143. Where can I find the safety data sheet? The safety data sheets can be found in the online shop (www.heylneomeris.shop) under the menu item – Service/Help – Downloads – Safety data sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. What is the optimum storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15-25°C. Device warranty / guarantee Measurement errors when using third-party indicators! The use of third-party indicators can lead to large measurement deviations or measurement errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

Original Heyl indicator solution in a double pack for determining the residual hardness in water with the Testomat 808 and F-BOB limit value measuring devices. The Testomat 808 310 indicator reacts at a limit value of 1 °dH. Residual hardness indicator 310 – colour-changing liquid solution for Testomat 808 Indicator solution for reliable indication of 1 °dH residual hardness The Testomat 808 Indicator 310 solution has been specially designed for monitoring higher residual hardness ranges in water. With a clearly defined measurement limit value of 0.1 °dH, the indicator produces clear colour changes in the Testomats, which provide rapid feedback on the condition of the water. Easy to use and clear measurement signals This indicator provides a clear colour reaction, which is particularly helpful when water quality checks are required in medium to higher hardness ranges. It is suitable for regular use in process and system monitoring and facilitates interpretation through clear colour signals. Individual areas of application for the Testomat 808 Indicator 310 from Heyl Industrial water monitoring Process water Supply systems

Original Testomat Indicator 320 solution for measuring increased residual hardness in water for use in the Testomat 808 and F-BOB limit value measuring devices. Available in a practical 2x100ml pack. Indicator 320 for increased residual hardness values in the Testomat 808 Reliable analysis solution for residual hardness up to 2 °dH In combination with the indicator solution and the Testomats, it supports the continuous monitoring of water quality parameters. This indicator is particularly suitable where higher residual hardness ranges are relevant and stable, reliable limit value displays are required. Its liquid form allows for easy application directly in the measuring device. Advantages for monitoring higher hardness ranges The 320 indicator is specially designed for residual hardness up to 2 °dH. This makes it ideal for applications in technical water systems where medium to higher hardness ranges must be monitored regularly and reliable measurement results are crucial. What are the possible areas of application? Monitoring residual hardness in reverse osmosis systems Boiler feed water Technical water supply Process water

Original indicator solution in a 500 ml bottle for measuring residual hardness in water with the Testomat 808 or F-BOB, designed for a limit value of 2 °dH. 500 ml indicator solution 320 from Heyl – residual hardness monitoring up to 2°dH Reliable liquid solution for detecting increased residual hardness Setting to a limit value of 2 °dH enables the targeted detection and monitoring of medium to higher hardness groups, which is particularly important for process water and feed water analyses. Efficiently support the measurement of increased hardness ranges – with the Testomat 808 Indicator 320 The indicator has been specially designed for a higher residual hardness range and provides stable analysis values directly from the measuring device. It impresses with its consistent responsiveness, even with demanding water quality requirements. Key features and typical applications of the Indicator 320 Measuring parameter: Residual hardness in water Specified limit value: 2 °dH (medium to higher hardness ranges) Package size: 500 ml original indicator solution Compatible with: Testomat 808 and Testomat F-BOB Advantages: larger supply quantity for longer measurement intervals, stable measurement reaction, ideal supplement for automated water analysis

Heyl Testomat 808 Original Indicator 330 Residual hardness threshold measurement with the Testomat 808 The Testomat 808 Indicator 330, 500 ml bottle, is used for measuring residual hardness. Indicator 330 monitors residual hardness at a value of 1.5 °dH and is suitable for use with the Testomat 808 and F-BOB devices. Testomat 808 Indicator 330 – Reliable Residual Hardness Monitoring at 1.5 °dH The Testomat 808 Indicator 330 was specifically developed for monitoring residual hardness in water treatment. With a defined threshold of 1.5 °dH, this indicator solution is ideal for applications with the corresponding water hardness. It is fully compatible with Testomat 808 and Testomat F-BOB devices and ensures stable, continuous measurement in your water treatment processes. The original indicator from Heyl provides a clear and reliable color change, allowing for a quick assessment of water quality. Using the original indicator solution ensures high process reliability and supports uninterrupted operation of your systems. Heyl Original Indicator – Your Safety for Measurement, Device, and Warranty Using the original Testomat 808 Indicator 330 is an essential part of reliable residual hardness monitoring. Only original indicator solutions ensure that the manufacturer’s specified measurement accuracy and functional parameters are consistently maintained. At the same time, using the original indicator ensures: the retention of warranty and guarantee claims proper operation of the measuring devices precise measurement results and long-term investment and operational security Häufige Fragen How long does the indicator/reagent last? The shelf life of an indicator is printed on the product label for each batch. In accordance with our terms and conditions, we deliver with a guaranteed minimum shelf life of 7 months. How much indicator is used per analysis? When it comes to indicator consumption, a distinction must first be made between TH indicators (e.g. TH 2005, 2025, 2050, etc.), which are used for the Testomat ECO, Testomat EVO TH, Testomat 2000 and Testomat Limit LT analysis devices, and the indicators for the Testomat 808 (300 series indicators, e.g. indicators 301, 305, etc.). The indicator consumption per analysis for the TH indicators is directly related to the limit value to be monitored. The higher this is, the higher the indicator consumption. For the Testomat 808 indicators (300 series), consumption is approximately 80 µl per analysis. By entering the operating data (analysis interval, limit value, etc.), the exact consumption or indicator requirement per year can be determined using our indicator consumption calculator: Indicators consumption calculator - Heyl Neomeris What sizes are available for the bottles and is there anything to bear in mind? The indicator is available in both 500 ml and 100 ml bottles. The analyser is delivered with the 500 ml bottle set up and the scope of delivery includes the screw cap with hole and insert for the screw cap of the 500 ml indicator bottle. For operation with 100 ml bottles, the bottle size must be changed to 100 ml in the basic programming and the screw cap with hole and insert for the indicator must also be purchased. For Testomat 808 devices, the conversion kit (item no. 37580) must be purchased for the use of 100 ml indicator bottles, and for Testomat 808 SiO2 devices, the insert with screw cap and suction tube (item no. 37645) and the hose connector ø 3.5 mm (item no. 37643) must be purchased. For all other Heylwelt Testomat devices, please use the conversion kit with item no. 40143. Where can I find the safety data sheet? The safety data sheets can be found in the online shop (www.heylneomeris.shop) under the menu item – Service/Help – Downloads – Safety data sheets. How can the indicator be disposed of? Disposal instructions can be found in section 13 of the safety data sheet. Disposal must be carried out in accordance with official regulations. Can the indicator still be used after the expiry date? The indicator can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. What is the optimum storage temperature for the indicator? Section 7 of the safety data sheet contains all relevant information on storing the indicator. The recommended storage temperature should be between 15-25°C. Device warranty / guarantee Measurement errors when using third-party indicators! The use of third-party indicators can lead to large measurement deviations or measurement errors. Damage caused by foreign particles in the area of the dosing pump, measuring chamber or valves is also possible. The use of third-party indicators will void the warranty! Only use original Heyl indicators, which are specially designed to meet the requirements of the measuring devices and thus guarantee accurate measurement results.

Liquid indicator solution for measuring residual hardness in water with the Testomat 808 and Testomat F-BOB limit value measuring devices – 2x100ml bottles with a limit value of 3 °dH for the medium to higher hardness range. Indicator 330 – reliable residual hardness monitoring with Testomat 808 Measuring solution for detecting residual hardness up to 3 °dH Indicator 330 for the Testomat 808 limit value measuring device is a specially developed liquid solution for the precise measurement of residual hardness values up to 3 °dH. It provides clear signals directly in the Testomat 808 or F-BOB, enabling deviations in water hardness to be detected at an early stage. The solution's reliable response to the defined limit value enables continuous monitoring of process water, boiler feed water and technical water systems. Clear signals for water analysis with Heyl analysers Measurements can be carried out quickly and reliably with the Indicator 330 directly in the devices. The defined reaction threshold at 3 °dH ensures clear measurement results, making it easy to monitor water quality and process control. Technical details and typical areas of application for indicator 330 Measured parameter: Residual hardness in water Limit value: 3 °dH Package size: 2x100 ml original indicator Compatible analysers: Testomat 808 and Testomat F-BOB Advantages: clear limit value display, easy integration into existing measurement routines, stable reaction signals Areas of application: technical water supply, process water monitoring, reverse osmosis systems

Originale 500 ml-Indikatorlösung zur Messung von Resthärte im Wasser – ausgelegt auf einen Grenzwert von 5 °dH. Kompatibel mit Testomat 808 und F-BOB. 500 ml indicator solution 350 from Heyl – residual hardness monitoring up to 5 °dH Reliable liquid solution for detecting increased residual hardness The Testomat 808 Indicator 350 is specially designed for detecting higher residual hardness values up to 5 °dH. With its measuring range, it helps to reliably detect changes in water quality even in more robust hardness ranges, especially where medium to significant residual hardness is present. Powerful for more pronounced hardness The indicator is particularly suitable for water analysis in applications where the residual hardness is not only low but also significantly pronounced. Thanks to its robust calibration, it delivers reproducible results even under more demanding process conditions. Key features and typical applications of indicator 350 Measured variable: Residual hardness in water – important indicator of water quality and process stability Limit value: 5°dH – for medium to high hardness levels Contents: 500 ml original indicator solution Compatibility: Suitable for Testomat® 808 and Testomat® F BOB measuring systems Advantages: larger liquid quantity for longer intervals between refills, stable analysis response, easy integration into automated measuring processes Areas of application: Monitoring of water in reverse osmosis systems, supply systems, boiler feed water and technical water processes