Testoval Hydrazine Reagents Refill Pack Testoval Hydrazine reagents refill pack for fast and manual analysis of hydrazine content in water in the concentration range of 0–1 mg/l N2H4. The individual values 0 mg/l, 0.05 mg/l, 0.1 mg/l, 0.25 mg/l, 0.5 mg/l and 1 mg/l can be read by optical color comparison. The Testoval Hydrazine reagents refill pack is used to replenish existing Testoval Hydrazine test kits from Heyl. With the included reagents, you can determine the hydrazine content in water samples quickly and reliably – without having to purchase a completely new test kit. The scope of delivery includes two reagents with 52 ml each, which are sufficient for approximately 100 analyses. Advantages of the Testoval Hydrazine Refill Pack from Heyl The Testoval Hydrazine refill pack is a practical refill solution for existing Testoval Hydrazine test kits. The refill pack is cost-efficient, as there is no need to purchase a new test kit. Possible application areas of the reagents Possible application areas include the monitoring of hydrazine in boiler and feed water, the supervision of water treatment plants, as well as routine laboratory analyses. It is also suitable for analyses of industrial and process water and for quality control in energy and power plant systems. You can also order the complete Testoval Hydrazine test kit in our online shop. As an alternative to the refill pack, you can also order the complete test kit directly in our shop. It includes the reagents, the color comparator, as well as the cuvette, measuring tube and measuring spoon. Item number: 410556 Testoval Hydrazine Test Kit Gold Analysis with a Hydrazine Test Kit

Refill Pack Reagents for Testoval Iron 0–1 mg/L (II + III) – Original from Heyl Colorimetric reagents for determining dissolved iron in the low concentration range for approx. 100 analyses With the refill pack reagents for Testoval Iron 0–1 mg/L (|| + |||) for the concentration range of 0–1 mg/L Fe, you can replenish your existing Testoval Iron analysis kit with a complete set of chemical reagents for determining iron in water. Original Heyl reagents for precise iron determination in the low measurement range The measurement range covers 0–1 mg/L Fe. Individual values of 0.05 mg/L, 0.1 mg/L, 0.25 mg/L, 0.5 mg/L, 0.75 mg/L, and 1.0 mg/L can be safely read using optical color comparison. As an original Heyl product, the reagents are precisely matched to the Testoval Iron test kit, ensuring consistently reliable results. Advantages of the Original Heyl Refill Reagents for Testoval Iron The refill pack allows for approximately 100 analyses, with a measurement time of about 7 minutes per sample. This makes the set an economical and efficient solution for regular iron analyses in drinking, process, and industrial water. By diluting the water sample at a 1:10 ratio with distilled water, the measurement range can be flexibly extended up to 10 times the iron concentration. Using original Heyl reagents ensures consistently high measurement quality, maximum compatibility, and reliable water analysis. Frequently asked questions How long do Heyl chemicals last? The shelf life is printed on the label of each product. Upon delivery, the guaranteed shelf life is at least 7 months. Can Heyl reagents also be purchased individually? That depends on the specific item to be ordered. For Testoval products, only the complete refill pack can be ordered. The individual small bottles cannot be reordered separately. For the Duroval test kit, the individual components of the refill pack can also be reordered separately. Can the indicator and titration solution be purchased separately? Yes, this is possible for the Duroval product range. Where can I find the safety data sheet? The safety data sheet can be found directly with the product in our shop or separately in the download area under the relevant heading. How can the chemicals 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 chemicals still be used after the expiry date? No, the chemicals can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. How should Heyl chemicals be stored? Section 7 of the safety data sheet contains all relevant information on the storage of chemicals. The recommended storage temperature should be between 15-25°C.

Refill Pack Reagents for Testoval Iron 0-10 mg/L (|| + |||) With the refill pack reagents for Testoval Iron 0-10 mg/L (|| + |||) from Heyl, you can supplement or refill your existing Testoval Iron analysis kit. The refill pack covers a measurement range from 0.25 mg/L to 10 mg/L Fe and allows for approximately 60 analyses. Reagents for reliable determination of dissolved iron in water The measurement range extends from 0.25 mg/L to 10 mg/L Fe. Individual values of 0.25 mg/L, 0.5 mg/L, 1 mg/L, 2.5 mg/L, 5 mg/L, and 10 mg/L can be safely read via optical color comparison. The refill pack is ideal for routine analyses in water monitoring. Advantages of the Testoval Iron Reagent Refill Pack The refill pack allows existing test sets to be used economically without purchasing a complete new analysis kit. The included reagents are precisely matched to the Testoval Iron measurement procedure from Heyl, ensuring reliable and reproducible results. The set enables approximately 60 analyses, with a measurement time of about 7 minutes per sample. The refill pack thus supports consistent measurement quality and efficient monitoring of iron levels in drinking, process, and industrial water. Frequently asked questions How long do Heyl chemicals last? The shelf life is printed on the label of each product. Upon delivery, the guaranteed shelf life is at least 7 months. Can Heyl reagents also be purchased individually? That depends on the specific item to be ordered. For Testoval products, only the complete refill pack can be ordered. The individual small bottles cannot be reordered separately. For the Duroval test kit, the individual components of the refill pack can also be reordered separately. Can the indicator and titration solution be purchased separately? Yes, this is possible for the Duroval product range. Where can I find the safety data sheet? The safety data sheet can be found directly with the product in our shop or separately in the download area under the relevant heading. How can the chemicals 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 chemicals still be used after the expiry date? No, the chemicals can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. How should Heyl chemicals be stored? Section 7 of the safety data sheet contains all relevant information on the storage of chemicals. The recommended storage temperature should be between 15-25°C.

Testoval pH-Chlor DPD Reagents Refill Pack The Testoval pH-Chlor DPD reagents refill pack is used to supplement an existing Testoval pH-Chlor analysis kit and enables continued fast and reliable manual control of pH value and chlorine content in water. The reagents are specially developed for colorimetric test methods. After adding the reagents, a characteristic color change occurs, which is then evaluated using the color comparison system of the test kit. This allows both the pH value and the concentration of free and total chlorine to be determined easily without electronic measuring devices. The refill pack ensures that existing test kits can continue to be used for routine analyses. Scope of delivery of the Testoval pH-Chlor DPD refill pack from Heyl The set contains all necessary reagents for carrying out further analyses. You receive a complete set of reagents for pH and chlorine determination, sufficient for approx. 70 analyses. The color comparator, cuvette, and other accessories are not included in the refill pack. These can be ordered individually or together as part of the complete test kit via our online shop. Advantages of the pH-Chlor DPD refill pack from Heyl The refill pack is a practical refill solution for the existing Testoval pH-Chlor DPD test kit. It enables the simultaneous determination of pH value as well as free and combined chlorine. It provides fast measurement results within a few minutes. Thanks to the test kit, the analysis can be carried out without electronic measuring devices and can be used independently of location. Possible application areas of the Heyl test kit for pH-chlorine measurement The reagents are suitable for various water analysis applications, such as monitoring water quality in swimming pools and wellness facilities, supervising disinfection processes in water treatment systems, as well as routine checks in technical water systems and service and maintenance operations in the field of water analysis. Technical Data Measurement parameters: pH value and chlorine (free and total chlorine) pH measuring range: pH 6.8 – 8 Chlorine measuring range: 0 – 1 mg/l Readable reference values: pH 6.8 / 7.4 / 8 Chlorine 0.1 / 0.5 / 1 mg/l Number of analyses: approx. 70 Measurement time: approx. 3 minutes Matching products available in our online shop Item number 410601: Testoval pH-Chlor DPD Test Kit – complete test kit for manual water analysis Item number 410603: Replacement Color Comparator pH-Chlor DPD

Reagents for the rapid manual analysis of aluminium content in water in the concentration range of 0 to 1.5 mg/l Al. Refill pack for the TESTOVAL colour comparison kit for aluminium. The Testoval Aluminium Reagent Refill Pack contains the appropriate reagents for refilling the Testoval Aluminium test kit. This allows the aluminium content in water to continue to be determined reliably without the need to purchase a completely new test kit. For simple and cost-effective continued use When the reagents in the test kit are used up, simply purchase a refill pack. This allows you to continue using the kit without having to buy a new one. The reagents are specially formulated for the Testoval system, ensuring that measurements remain reliable and comparable. Instructions for use The reagents are intended exclusively for use with the corresponding Testoval Aluminium Test Kit. They enable the continued use of the kit. By simply refilling the kit, the aluminium content in the water can once again be reliably tested.

Reagents in a refill pack for the TESTOVAL Ammonium Colour Comparison Kit, for rapid manual analysis of the ammonium content in water within a concentration range of 0 to 10 mg/l NH4+. The Testoval Ammonium Reagent Refill Pack contains the appropriate reagents for the Testoval Ammonium Test Kit. The existing kit can be easily refilled with these reagents. Refilling reagents – for measuring the ammonium content The refill pack contains the reagents required to carry out the ammonium tests. The reagents react with water to produce a colour, which can then be read off the scale. They are designed to work with the test kit, ensuring that the measurement results remain precise, reliable and comparable.

Testoval Chloride Reagents Refill Pack – precise and fast measurement results This product is a refill pack for the Testoval Chloride test kit from Heyl. The reagents allow for approximately 40 analyses. The Testoval Chloride reagents refill pack is used to replenish existing Testoval Chloride test kits for manual water analysis in the concentration range of 0–100 mg/l Cl. With the included reagents, the chloride content in water can be determined quickly and reliably. During the analysis, the water sample reacts with the reagents and produces a measurable color change. This is then compared with the color scale of the Testoval color comparator, allowing the chloride value to be read easily. The individual values 1 mg/l, 5 mg/l, 10 mg/l, 25 mg/l, 50 mg/l and 100 mg/l can be read by optical color comparison. The refill pack contains a complete set of reagents and enables approximately 40 analyses without the need for a new test kit. Advantages of the refill pack for the chloride test kit from Heyl easy storage and transport suitable for regular routine analyses enables refilling of existing Testoval Chloride test kits Possible application areas environmental analyses and quality controls drinking water monitoring water treatment plants laboratory examination of water samples

Testoval Chlor DPD Reagents Refill Pack – Measure Chlorine Levels Reliably Refill your Testoval Chlor test set for consistent results The Testoval Chlor DPD Reagents Refill Pack is designed for DPD chlorine tests in the concentration range of 0.1–1 mg/l for free and total chlorine. Individual values of 0.1 mg/l, 0.2 mg/l, 0.3 mg/l, 0.5 mg/l, 0.75 mg/l, and 1 mg/l can be read using an optical color comparison. With this refill pack, you can continue to perform accurate chlorine determinations. Fast color changes simplify water analysis. Refill Reagents for Precise DPD Chlorine Analysis in the Low Range The Testoval Chlor DPD Reagents Refill Pack from Heyl is intended for refilling the Testoval Chlor test sets and ensures reliable determination of free and total chlorine in the 0.1–1.0 mg/l range. Using optical color comparison, individual values of 0.1 mg/l, 0.2 mg/l, 0.3 mg/l, 0.5 mg/l, 0.75 mg/l, and 1.0 mg/l can be read accurately. This makes the refill pack ideal for routine water monitoring checks. Advantages of the Testoval Chlor DPD Refill Pack for Water Analysis The refill pack allows existing test sets to be used economically and sustainably. The reagents produce fast and clear color changes, simplifying evaluation and reducing measurement errors. The DPD method is a proven procedure for chlorine determination and is suitable for various applications, such as drinking water monitoring, swimming pools, or technical installations. The refill pack ensures consistent measurement quality and reliable chlorine analysis in daily use. Frequently asked questions How long do Heyl chemicals last? The shelf life is printed on the label of each product. Upon delivery, the guaranteed shelf life is at least 7 months. Can Heyl reagents also be purchased individually? That depends on the specific item to be ordered. For Testoval products, only the complete refill pack can be ordered. The individual small bottles cannot be reordered separately. For the Duroval test kit, the individual components of the refill pack can also be reordered separately. Can the indicator and titration solution be purchased separately? Yes, this is possible for the Duroval product range. Where can I find the safety data sheet? The safety data sheet can be found directly with the product in our shop or separately in the download area under the relevant heading. How can the chemicals 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 chemicals still be used after the expiry date? No, the chemicals can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. How should Heyl chemicals be stored? Section 7 of the safety data sheet contains all relevant information on the storage of chemicals. The recommended storage temperature should be between 15-25°C.

Testoval Chromate Reagents Refill Pack The refill pack allows additional analyses to be carried out without the need for a completely new test kit. Testoval Chromate reagents enable fast manual analysis of chromate content in water in the concentration range of 0–5 mg/l Cr. The Testoval Chromate reagents refill pack is used to replenish existing Testoval Chromate test kits for manual water analysis. With the included reagents, the chromate content in water samples can be determined reliably. During the analysis, the water sample reacts with the reagents and produces a distinct color change, which is then compared with the corresponding scale using the Testoval color comparator. This allows the chromate concentration to be read easily within 3 minutes. Why buy the Testoval Chromate refill pack from Heyl? compact reagent bottles for storage and transport fast and reliable color development practical refill solution for Testoval Chromate test kits Possible application areas monitoring of industrial and wastewater treatment plants laboratory examination of water samples environmental analysis and water monitoring Technical data 1 set of reagents (1xA, 2xB) Number of analyses: approx. 180 Measurement time: approx. 3 minutes The individual values 0.1 mg/l, 0.25 mg/l, 0.5 mg/l, 1 mg/l, 2.5 mg/l and 5 mg/l can be read by optical color comparison. The scope of delivery includes only the set of reagents. The color comparator or the complete colorimetric test kit are also available in our shop. Also available in our shop: Item number 410532: Complete Set Testoval Chromate Test Kit Item number 410534 Replacement Color Comparator

Refill pack: Testoval Nitrite Reagent for the rapid manual analysis of nitrite levels in water within the concentration range 0–1 mg/l NO₂. With the refill pack for the Testoval Nitrite Test Kit, you can easily continue using your existing kit. The reagents ensure that you can continue to reliably test the nitrite content in the water without having to buy a new test kit. Fresh reagents for accurate nitrite measurements The refill pack contains a complete set of reagents for the Testoval Nitrite Test Kit. The reagents are required to produce a colour reaction in the water sample; only then can the nitrite value be read on the colour comparison device. The reagents are only suitable if you already own a nitrite colour comparison device. They are not suitable for testing without the colour comparison device. Easy refilling of reagents Once the existing chemicals have been used up, they can simply be replaced with this refill pack. The test then works just as usual. The reagents allow for approximately 100 further analyses, each taking around 15 minutes to complete.

Testoval Phosphate Reagents Refill Pack – Accurate Phosphate Measurement Testoval for continuous, precise phosphate analyses – the original from Heyl Testoval Phosphate Reagents Refill Pack for quick and manual analysis of phosphate content in water. Individual values of 0.25 mg/L, 0.5 mg/L, 1 mg/L, 2.5 mg/L, 5 mg/L, and 10 mg/L can be read using optical color comparison. The refill pack provides reproducible results within minutes. By diluting the water sample at a 1:10 ratio with distilled water, the measurement range can be extended up to ten times. Refill reagents for reliable and reproducible phosphate analyses The Testoval Phosphate Reagents Refill Pack is designed to supplement an existing Testoval Phosphate analysis kit and allows for quick and manual determination of phosphate content in water. The refill pack is ideal for routine monitoring in water analysis. Advantages of the Testoval Phosphate Reagents Refill Pack for water analysis The refill reagents provide reproducible results within minutes and allow for simple evaluation without additional measurement equipment. This supports efficient and reliable phosphate analysis in drinking, process, and industrial water. By diluting the water sample at a 1:10 ratio with distilled water, the measurement range can be flexibly extended up to ten times the phosphate concentration. The refill pack therefore offers high operational reliability and an economical solution for regular phosphate measurements. Using the original Heyl test kit together with the corresponding refill pack ensures consistently reliable and accurate test results. Frequently asked questions How long do Heyl chemicals last? The shelf life is printed on the label of each product. Upon delivery, the guaranteed shelf life is at least 7 months. Can Heyl reagents also be purchased individually? That depends on the specific item to be ordered. For Testoval products, only the complete refill pack can be ordered. The individual small bottles cannot be reordered separately. For the Duroval test kit, the individual components of the refill pack can also be reordered separately. Can the indicator and titration solution be purchased separately? Yes, this is possible for the Duroval product range. Where can I find the safety data sheet? The safety data sheet can be found directly with the product in our shop or separately in the download area under the relevant heading. How can the chemicals 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 chemicals still be used after the expiry date? No, the chemicals can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. How should Heyl chemicals be stored? Section 7 of the safety data sheet contains all relevant information on the storage of chemicals. The recommended storage temperature should be between 15-25°C.

Color comparator, cuvettes and additional accessories are not included in the refill pack The Testoval pH range 5.5 to 8 reagents refill pack from Heyl is used to replenish an existing Testoval pH test kit. It enables continued fast and reliable manual determination of the pH value in water. The reagents are specially developed for colorimetric analysis. After being added to the water sample, a characteristic color change occurs, which is visually evaluated using the color comparator of the test kit. This allows the pH value to be determined easily without electronic measuring devices. The refill pack ensures that the existing test kit can continue to be used for further routine analyses and is particularly suitable for regular monitoring in water treatment, industry, or laboratories. Advantages of the refill pack It is a practical refill solution for the Testoval pH test kit and is ideal for regular routine and control measurements. The optical color comparison allows pH values to be checked quickly and reliably. No electronic measuring devices are required for the measurement. Application areas of the Testoval pH test kit from Heyl The refill pack, together with the test kit, can be used in many areas such as monitoring the pH value in drinking and process water, supervising water treatment and dosing systems, and routine analyses in laboratories and technical facilities. Technical data of the Testoval pH refill pack from Heyl Measurement parameter: pH value Measuring range: pH 5.5 – 8 Readable reference values: 5.5 / 6 / 6.5 / 7 / 7.5 / 8 Number of analyses: approx. 250 Measurement time: approx. 1 minute Measurement principle: colorimetric color comparison Also available in our online shop: Item number: 410610 Complete test kit Testoval pH 5.5–8 Item number: 410612 Replacement color comparator pH 5.5–8

Testoval pH Range 8 to 12 Reagents Refill Pack This refill pack allows continued use of the Testoval pH range 8 to 12 test kit from Heyl without purchasing a new one. It is perfect for regular measurements and provides reliable, fast results. The Testoval pH range 8 to 12 reagents refill pack is the ideal addition to existing Testoval pH test kits in the alkaline measuring range. It enables continued reliable and simple determination of pH value without additional measuring devices. The specially coordinated reagents produce a distinct color change after being added to the water sample. This is visually evaluated using the color comparison system of the test kit, allowing the pH value to be determined quickly and accurately. Your advantages with our refill pack from Heyl for pH measurement The refill pack is ideal for regular measurements and ensures that existing test kits can continue to be used long-term. It is perfect for routine and control measurements and delivers reliable results through the visual color comparison method. The individual values pH 8 mg/l, 8.5 mg/l, 9 mg/l, 10 mg/l, 11 mg/l and 12 mg/l can be read by optical color comparison. The scope of delivery includes only the reagents for simple concentration determination. 1 set of reagents Measurement time: approx. 1 minute Analyses: approx. 250 Possible application areas The reagents are suitable for various water analysis applications such as monitoring alkaline process and wastewater, routine analyses in laboratories and industry, as well as quality and environmental controls and the monitoring of technical systems and cooling circuits. This product is only a reagents refill pack; the color comparator, cuvettes, and additional accessories are not included. Matching products available in our online shop: Item number 410616: Testoval pH range 8 to 12 test kit – complete set for pH analysis Item number 410618: Replacement color comparator pH 8–12 – device for optical evaluation

Testoval Silicate Reagents Refill Pack If the existing test kit is used regularly, the Testoval Silicate reagents refill pack ensures that measurements can continue to be carried out reliably. It is specifically designed for the Testoval silicate system and enables continuous determination of dissolved silicate in water. The included reagents react with the sample and produce a measurable color change. This is then evaluated using the color comparator, allowing the silicate concentration to be determined quickly and transparently – without additional measuring technology. The measuring range is 0–10 mg/l SiO₂ and can be extended by diluting the sample if required. Your advantages with the reagent refill pack from Heyl for silicate measurement The refill pack is a perfectly matched addition for existing Testoval silicate test kits and enables continuous use of the test kit without the need for a new purchase. Thanks to the visual evaluation, no electronic devices are required. Please note that the color comparator and accessories are not included in the refill pack. Also available in our online shop Item number: 410622 Testoval Silicate Test Kit – complete set for analysis Item number: 410624 Replacement Color Comparator

Testoval Sulfite Reagents Refill Pack – precise sulfite measurement Refill reagents for reliable determination of sulfite in water The reagents refill pack contains replacement liquids for the Testoval sulfite test kit. With these replacement reagents, you can continue using your test kit without purchasing a new one. For regular sulfite measurements in water, the Testoval sulfite reagents refill pack provides a practical way to keep existing test sets in use efficiently. The reagents are precisely matched to the Testoval system and support reliable determination of sulfite concentration via visual color comparison. After being added to the sample, a measurable color change occurs, which is compared with the reference values of the color comparator. This allows the sulfite content to be quickly determined – without electronic measuring devices or additional technical effort. Refill and determine precise sulfite values in water The refill pack for sulfite tests in the concentration range of 0–20 mg/l SO₃²⁻ is sufficient for approx. 150 analyses. The typical application range is 0–20 mg/l SO₃²⁻, making the refill pack suitable for many water monitoring applications. The refill pack represents an economical solution for regular sulfite measurements. Advantages of the Testoval sulfite refill reagents for water analysis With the refill pack, you extend the service life of your existing Testoval sulfite test kit without having to purchase a complete new analysis set. The included reagents enable reliable and reproducible measurement results with a measurement time of approx. 19 minutes per analysis. Regular monitoring of sulfite is important to safely control chemical processes, manage dosing, and maintain consistent water quality. The refill reagents support efficient and economical routine analysis. Accurate sulfite dosing plays a particularly important role in corrosion prevention. The color comparator, cuvettes, and accessories are not included in the scope of delivery. Additional products are available in our online shop Item number: 410634 Testoval sulfite test kit – complete set for analysis Item number: 410636 Replacement color comparator sulfite – for optical evaluation Frequently asked questions How long do Heyl chemicals last? The shelf life is printed on the label of each product. Upon delivery, the guaranteed shelf life is at least 7 months. Can Heyl reagents also be purchased individually? That depends on the specific item to be ordered. For Testoval products, only the complete refill pack can be ordered. The individual small bottles cannot be reordered separately. For the Duroval test kit, the individual components of the refill pack can also be reordered separately. Can the indicator and titration solution be purchased separately? Yes, this is possible for the Duroval product range. Where can I find the safety data sheet? The safety data sheet can be found directly with the product in our shop or separately in the download area under the relevant heading. How can the chemicals 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 chemicals still be used after the expiry date? No, the chemicals can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. How should Heyl chemicals be stored? Section 7 of the safety data sheet contains all relevant information on the storage of chemicals. The recommended storage temperature should be between 15-25°C.

Testoval Copper Reagents Refill Pack The Testoval Copper reagents refill pack is a practical addition to your existing Testoval Copper analysis kit. With this refill pack, you can continue using your test kit without having to purchase a completely new set. The refill pack contains a complete set of reagents for the fast manual determination of copper content in water in the range of 0–2 mg/l Cu, based on the proven color comparison method from Heyl. With this refill pack, you can continue using your test kit without having to purchase the entire set again – an economical and sustainable solution for repeated measurements. The reagents are specifically designed for use with the Testoval color comparator from Heyl and provide reproducible results within just a few minutes. The scope of delivery includes only the reagents. The complete Testoval Copper test kit or a replacement color comparator are available separately. Your advantages at a glance The suitable refill pack for the Testoval Copper test kit includes one set of copper reagents for approximately 100 analyses and delivers fast visual measurements in just 2 minutes. It enables precise determination of copper values in the range of 0 to 2 mg/l. Ideal for many application areas The test kit can be used in the laboratory, for monitoring boiler and feed water, in water treatment plants, or for regular service and maintenance operations. With this refill pack, you can continue your copper analyses quickly, reliably, and easily. With this refill pack, you can continue using your test kit without having to purchase the entire set again. It is an economical and sustainable solution for repeated measurements. Item number: 410562 Testoval Copper Test Kit Item number: 410564 Replacement Color Comparator

The Testoval chlorine dioxide reagents from Heyl are ideal for use with the portable PPM150 photometer. They are suitable for low to medium concentrations of disinfectants in water. Testoval Chlorine Dioxide Reagents – perfect for use with PPM150 The Testoval chlorine dioxide reagents are suitable for the determination of chlorine dioxide (ClO₂) in water. They are used in colorimetric analyses, where a water sample reacts with the reagents to produce a measurable color change. The chlorine dioxide content can then be reliably determined by comparison or photometric evaluation. Suitable for low to medium concentrations of disinfectants in water. In combination with the PPM150 Portable Photometer, a measuring range of 0 to 2.8 mg/l chlorine dioxide can be achieved. Advantages precise determination of chlorine dioxide compatible with photometer measuring systems such as the PPM150 fast chemical reaction ideal for regular water analyses and routine checks Possible applications Monitoring of disinfectants Control of chlorine dioxide dosing systems Water treatment and water technology Quality control of process and operating water (Use with #880115 PPM150 Portable Photometer, Neomeris)

Testoval Copper Test Kit – manual analysis of copper content The evaluation of the Testoval Copper test kit from Heyl is carried out visually via the color scale, allowing a direct concentration comparison. The test kit includes all necessary components required for the analysis. The Testoval Copper test kit is a colorimetric color comparison test kit for the fast manual analysis of copper (Cu) in water samples. A distinct color change is produced through a chemical reaction of the reagents, which can then be reliably read using the included color comparator. Advantages of the Copper Test Kit from Heyl at a glance The complete test kit with reagents and color comparator provides fast, visual, and precise measurement results when determining hydrazine content. Without the need for an electronic measuring device, the test kit is compact and portable, making it ideal for regular inspections and service applications. Possible application areas of the Testoval Copper Test Kit Thanks to its compact design, the test kit is ideal for mobile use as well as for routine checks directly on-site or in the laboratory. The test kit can be used in water treatment, in technical systems, or for regular quality control. Technical Data Measuring range: 0–3 mg/l Cu Readable values: 0, 0.1, 0.2, 0.5, 1, 2, 3 mg/l Number of analyses: approx. 100 Measurement time: approx. 2 minutes Refill option without purchasing a new test kit With the Testoval Copper reagents refill pack, the reagents can be replaced without purchasing the complete test kit again – an economical and sustainable solution for repeated measurements. Item number 410563 Refill pack Testoval Copper Reagents Item number 410564 Replacement Color Comparator

Testoval Hydrazine Test Kit – manual analysis of hydrazine content Testoval Hydrazine color comparison test kit for fast manual analysis of hydrazine content in water in the concentration range of 0–1 mg/l N2H4. The scope of delivery includes reagents as well as a color comparator for simple concentration determination. The Testoval Hydrazine test kit is used for the fast manual determination of hydrazine (N₂H₄) in water samples. The analysis is carried out via a chemical reaction with reagents that produce a visible color change. The hydrazine concentration can then be reliably determined through optical comparison in the comparator. In addition to the reagents, the scope of delivery also includes a color comparator for concentration determination, a measuring tube, and a measuring spoon. Advantages of the Hydrazine Test Kit from Heyl The complete test kit with reagents and color comparator is ideal for mobile use thanks to its compact design. Hydrazine can be determined quickly and easily via optical color comparison. No electronic measuring device is required. Possible application areas of the test kit The hydrazine test kit can be used in various fields. It is primarily used for determining hydrazine in water samples but can also be used for simple gold analyses due to the chemical reaction. Technical data of the Testoval Hydrazine Test Kit from Heyl Number of analyses: approx. 100 Measurement time: approx. 2 minutes Measuring range: 0–1 mg/l N₂H₄ Readable values: 0 mg/l, 0.05 mg/l, 0.1 mg/l, 0.25 mg/l, 0.5 mg/l and 1 mg/l Order the Testoval Hydrazine Reagents Refill Pack conveniently online As an alternative to the complete test kit, you can also order the Testoval Hydrazine reagents refill pack. This saves costs, as you do not need to purchase the entire test kit again. The refill pack contains 2 bottles of reagents with 52 ml each. Item number: 410557 Testoval Hydrazine Reagents Refill Pack Item number: 410558 Replacement Color Comparator TESTOVAL Hydrazine

Testoval Iron 0-1 mg/L Test Kit ||/||| - Precise Iron Analysis Rapid iron determination with clear color reaction The Testoval Iron 0-1 mg/L color comparison kit is used to determine the iron content in water within a concentration range of 0-1 mg/L Fe. Individual values of 0.05 mg/L, 0.1 mg/L, 0.25 mg/L, 0.5 mg/L, 0.75 mg/L, and 1 mg/L can be read using an optical color comparison. The kit includes two reagents and a color comparison device for simple concentration determination. The color comparison kit enables reliable detection of low iron concentrations in water. By diluting the water sample at a 1:10 ratio with distilled water, the measurement range can be extended up to ten times. Fast and reliable determination of low iron concentrations in water The test kit is ideal for applications where low iron levels need to be reliably monitored, such as drinking water monitoring, water treatment, or technical installations. Advantages of the Testoval Iron 0-1 mg/L Test Kit The color comparison kit allows for a simple and rapid manual analysis of iron content with a clearly visible color reaction. The included color comparison device supports accurate evaluation and reduces user errors. By diluting the water sample at a 1:10 ratio with distilled water, the measurement range can be flexibly extended up to 10 mg/L Fe. This makes the test kit highly versatile and suitable for both routine checks and extended analyses. Frequently asked questions How long do Heyl chemicals last? The shelf life is printed on the label of each product. Upon delivery, the guaranteed shelf life is at least 7 months. Can Heyl reagents also be purchased individually? That depends on the specific item to be ordered. For Testoval products, only the complete refill pack can be ordered. The individual small bottles cannot be reordered separately. For the Duroval test kit, the individual components of the refill pack can also be reordered separately. Can the indicator and titration solution be purchased separately? Yes, this is possible for the Duroval product range. Where can I find the safety data sheet? The safety data sheet can be found directly with the product in our shop or separately in the download area under the relevant heading. How can the chemicals 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 chemicals still be used after the expiry date? No, the chemicals can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. How should Heyl chemicals be stored? Section 7 of the safety data sheet contains all relevant information on the storage of chemicals. The recommended storage temperature should be between 15-25°C.

Testoval Iron 0–10 mg/l II/III Test Kit – Efficient Iron Analysis Measurement of iron concentration with the Heyl Testoval Iron kit The Testoval Iron 0–10 mg/l II/III Test Kit is used to determine higher iron concentrations in water. Individual values of 0.25 mg/l, 0.5 mg/l, 1 mg/l, 2.5 mg/l, 5 mg/l, and 10 mg/l can be read using an optical color comparison. The kit allows reliable and rapid determination of iron concentration up to 10 mg/l. In addition to the three reagents, a color comparison device for easy concentration determination is included. Approximately 60 analyses can be performed, with a measurement time of about 7 minutes each. Reliable Determination of Higher Iron Concentrations in Water The Testoval Iron 0–10 mg/l II/III Test Kit enables precise measurement of iron concentrations in water samples over an extended range. Using optical color comparison, individual values of 0.25 mg/l, 0.5 mg/l, 1 mg/l, 2.5 mg/l, 5 mg/l, and 10 mg/l can be read accurately. The kit is especially suitable for applications where elevated iron levels need to be monitored, e.g., in drinking water treatment, industry, or process and operational water analysis. Advantages of the Testoval Iron Test Kit for Water Analysis The Testoval Iron Test Kit allows fast and reliable iron determination with a measurement time of approximately 7 minutes per analysis. The included color comparison device simplifies evaluation and ensures reproducible results. With the three reagents provided, around 60 analyses can be performed, making the kit an economical solution for routine checks. It helps users detect iron contamination early and take appropriate measures to maintain water quality. Frequently asked questions How long do Heyl chemicals last? The shelf life is printed on the label of each product. Upon delivery, the guaranteed shelf life is at least 7 months. Can Heyl reagents also be purchased individually? That depends on the specific item to be ordered. For Testoval products, only the complete refill pack can be ordered. The individual small bottles cannot be reordered separately. For the Duroval test kit, the individual components of the refill pack can also be reordered separately. Can the indicator and titration solution be purchased separately? Yes, this is possible for the Duroval product range. Where can I find the safety data sheet? The safety data sheet can be found directly with the product in our shop or separately in the download area under the relevant heading. How can the chemicals 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 chemicals still be used after the expiry date? No, the chemicals can no longer be used after the expiry date. After the expiry date, accurate measurement results can no longer be guaranteed. How should Heyl chemicals be stored? Section 7 of the safety data sheet contains all relevant information on the storage of chemicals. The recommended storage temperature should be between 15-25°C.

Colour comparison kit for rapid manual analysis of aluminium content in water within a concentration range of 0–2.0 mg/l Al. The Testoval Aluminium Test Kit is a colour comparison kit for the manual analysis of aluminium content in water within a range of 0 to 2.0 mg/l aluminium. The kit allows the aluminium concentration to be read directly using a colour scale. Simple aluminium testing in water A slight colour change in the colour comparison device reveals the aluminium content. A water sample is placed in the supplied device, the reagents are added, and the colour intensity is then compared with a scale to read the value. Values from 0 to 2.0 mg/l can be read. By diluting the sample with distilled water in a ratio of 1:10, the measuring range can be extended to 10 times the concentration if required. When diluted with distilled water in a ratio of 1:10, the range is 0–20 mg/l (hand test) and 0–10 mg/l (PPM 150). Advantages and areas of application The test kit: Enables rapid manual determination of the aluminium content in water Works without electricity or a photometer; requires only colour comparison and reagents Provides results in approx. 6 minutes and is sufficient for approx. 130 analyses A wider measurement range can be covered by diluting the sample Such colour comparison tests are well suited for rapid checks in water treatment, swimming pools, industrial facilities or environmental measurements.

Colour comparison kit for the rapid manual analysis of the ammonium content in water within a concentration range of 0 to 10 mg/l NH4+. The Testoval Ammonium Test Kit is a colour comparison kit that allows the ammonium content in water to be determined visually by comparing colours. This enables you to quickly determine how much ammonium is present in the water without the need for electronic measuring devices. How does the Ammonium Test Kit work? The test kit operates on the colour comparison principle. A defined amount of water is placed in a measuring tube, and the appropriate reagents are added. You then pour this mixture into a cuvette. Insert the cuvette into the ammonium colour comparison device. After a measurement time of approximately four minutes, a colour develops which is compared with the scale on the device. The more intense the colour, the higher the ammonium content. Individual values of 0.1 mg/l, 0.5 mg/l, 1 mg/l, 2.5 mg/l, 5 mg/l and 10 mg/l can be read directly from the visual colour comparison. Why is the test kit practical? The Testoval Ammonium Test Kit makes checking the ammonium content in water quick and easy. Everything needed for testing is included in the kit. The measurements provide reliable results within a few minutes and are suitable for regular quick checks in swimming pools, wells or water treatment plants. The kit allows you to carry out approximately 70 analyses.

Testoval Chloride Test Kit – Manual Analysis of Chloride Content Color comparison test kit from Heyl for fast manual analysis of the chloride content in water in the concentration range of 0–100 mg/l Cl. The Testoval Chloride Test Kit is a color comparison analysis device for the fast manual determination of chloride content in water. The measurement is carried out by a chemical reaction with reagents that produces a color change. The sample is then compared with a scale in the color comparison device, allowing the chloride value to be read easily. In addition to the two reagents, the scope of delivery includes a color comparison device for simple concentration determination. Technical Data for the Chloride Test Kit from Heyl The individual values 1 mg/l, 5 mg/l, 10 mg/l, 25 mg/l, 50 mg/l and 100 mg/l can be read by optical color comparison. Number of possible analyses: approx. 40 Measurement time: approx. 3 minutes Advantages of the Color Comparison Test Kit from Heyl no electronic measuring devices required suitable for routine checks of water samples provides clear and easy-to-read results complete test set with reagents and color comparison device Possible Application Areas of the Testoval Chloride Test Kit laboratory analyses and quality controls water treatment plants drinking water monitoring environmental and water analysis Also Available in Our Shop: Item number: 410527 Testoval Chloride Reagents Refill Pack Item number: 410528 Chloride color comparison device Testoval