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 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.

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

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.

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.

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

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