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

Test kit Polyamine A-853 R – Determination of polyamine content The Polyamine A-853 R test kit from Heyl contains all necessary reagents for determining the polyamine content, enabling easy handling without complex laboratory equipment. The Polyamine A-853 R test kit is a complete analytical system for the fast and reliable determination of polyamine content in industrial water treatment systems. It has been specifically developed for monitoring recirculating and cooling water systems in which polyamines are used as corrosion inhibitors or conditioning agents. The set allows for simple analysis directly on-site or in the laboratory. Thanks to the coordinated reagent composition, the test kit delivers reproducible results with high measurement reliability. The typical measuring range is particularly suitable for applications with standardized dosing in technical water circuits. An analysis takes only about 3 minutes and offers a resolution of 1 mg/l, enabling fast process control. With an average concentration of 30 mg/l, approximately 100 analyses can be performed with one complete set. Scope of delivery of the Polyamine Test Kit A-853 R from Heyl 1× Reagent A 1× Reagent B 2× Reagent C 1× Titration solution A-853 Technical data at a glance Measurement principle: Titration for determination of polyamines Measurement time: approx. 3 minutes Resolution: 1 mg/l Number of analyses: approx. 100 analyses at an average concentration of 30 mg/l Advantages of the test kit from Heyl fast analysis in approx. 3 minutes easy application in the laboratory and on-site high reproducibility of results suitable for recirculating and cooling water systems precise resolution of 1 mg/l approx. 100 analyses per set possible optimized for industrial water treatment reliable process monitoring Typical application areas water treatment in industrial plants cooling and recirculating systems power plants (routine monitoring) process water in industry laboratory analysis pharmaceutical and food industry water monitoring Refill system Suitable refill components are available for the test kit, including in particular the Polyamine titration solution A-853R as well as supplementary reagents, enabling continuous use and regular analyses. Item number: 400179 Refill pack Polyamine titration solution A-853R + Reagent C Item number: 400192 Polyamine titration solution A-853R

The Polyamine Test Kit B42-C71 is a manual analysis set for determining polyamines in water. Application: Test kit for measuring the polyamine content in circulating water. Visibly determine polyamines in water The polyamine test kit is a titration set. With this test kit, you can directly check the polyamine content in water samples. All polyamine kits work with a pipette calibrated from 0 – 60 mg/l (resolution 1 mg/l). Test procedure Part 1 Pull the glass tube from the kit and fill it up to the graduation mark with the water sample. Add reagent C until the bottom is well covered (approx. 25 drops). Add 2 drops of reagent A and 2 drops of reagent B. Seal the glass tube with the screw cap and shake vigorously. Then wait until the solution in the glass tube separates into 2 layers. Bottom layer colorless: no polyamines present Bottom layer blue: polyamines present Part 2 (if the bottom layer is blue) Please read the instructions included with the test kit. Applications of the test kit Test kit for analyzing the polyamine content in circulating water.

The CCOH Polyamine Test Kit is used to determine the polyamine concentration in circulating water. This polyamine test kit is a titration set. The CCOH Polyamine Test Kit is a set for determining polyamines in water. The test kit for polyamine determination works according to the principle of titration. All polyamine test kits use a pipette calibrated in the range of 0 to 60 mg/l (resolution: 1 mg/l). If needed, a second pipette filling can be added, extending the measurement range up to 120 mg/l (K26). Visible measurement of polyamines in water A water sample is taken with the test kit, the appropriate reagents are added, and the color change is observed. Approximately 100 analyses can be performed at an average concentration of 30 mg/l, with a measurement time of about 3 minutes. Please read the enclosed instructions carefully. Features at a glance Manual determination of polyamine content without electronic devices Color change for simple and direct reading Fast results within a short time Compact all-in-one solution with reagents Analyses: approx. 100 (at an average content of 30 mg/l) Measurement time: approx. 3 minutes Resolution: 1 mg/l

The Polyamine Test Kit K 26 is a manual test set for determining polyamines in water. This polyamine test kit is a titration set. Color comparison for polyamines – simple and direct The test kit for polyamine determination works according to the principle of titration. With this test kit, you can visibly measure the polyamine levels in your water samples. All polyamine test kits use a pipette with a measurement range of 0–60 mg/l and a resolution of 1 mg/l. A second pipette filling can be added if needed, which corresponds to a measurement range of up to 120 mg/l for K26. Test procedure – Part 1 Remove the glass tube from the test kit and fill it with the water sample up to the graduation mark. Add reagent C until the bottom of the tube is completely covered (approx. 25 drops). Then add 2 drops of reagent A and 2 drops of reagent B. Seal the glass tube with the screw cap and shake vigorously. Then wait until the solution in the glass tube separates into two layers. Evaluation: Bottom layer colorless: no polyamines present Bottom layer blue: polyamines present Part 2 (if the bottom layer is blue) Please read the instructions included with the test kit. Properties and benefits Application: Test kit for measuring the polyamine content in circulating water Allows visible determination of polyamine content in water Fast and reliable results Analyses: approx. 100 (at an average content of 30 mg/l) Measurement time: approx. 3 minutes Resolution: 1 mg/l

The Polyamine Test Kit V 15/30 is a manual analysis set for determining polyamines in water. The polyamine test kit is based on a titration method. Visible results through color change Test kit for measuring the polyamine content in circulating water. A defined water sample is taken, reagents are added, and then the color reaction is observed. Please refer to the included instructions for how to perform the test. Various applications The set is particularly suitable for determining the polyamine content in circulating water (cooling circuits, process water, or industrial applications), where it is regularly necessary to check whether the polyamine level is within a defined range. Contents: 1x Polyamine Reagent A 1x Polyamine Reagent B 2x Polyamine Reagent C 1x Polyamine Titration Solution V15/V30 1x Glass tube with graduation mark and screw cap 1x Pipette All polyamine test kits use a pipette calibrated from 0–60 mg/l with a resolution of 1 mg/l.

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

Replacement color comparator without cuvette, for the Testoval Chlorine DPD color comparison kit for the concentration range 0.1–1 mg/l free and total chlorine. The three reagents are not included in the scope of delivery and can be ordered separately or as part of a complete set. Chlorine DPD 0.1–1 mg/l - Color Comparator Testoval – Values by color comparison The Testoval color comparator for Chlorine DPD (0.1–1 mg/l) is a replacement color comparator for the Testoval chlorine test kit from Heyl. It is used to determine free and total chlorine in water by means of an optical color comparison. The device is specifically designed for the measuring range of 0.1 to 1 mg/l chlorine and serves as a replacement part for the corresponding Testoval test kit. The reagents are not included in the scope of delivery and must be ordered separately. Technical data: Analyses: approx. 70 Measurement time: approx. 1 minute The individual values 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 by optical color comparison. Possible applications Drinking water and process water analyses Monitoring of disinfection processes Routine analyses in laboratories Service and maintenance operations in water systems Why should you order the color comparator from Heyl? Fast determination of chlorine content through optical color comparison Specifically designed for Testoval Chlorine DPD 0.1–1 mg/l test kits Clear color scale for quick concentration determination You can also order the test kit complete or as a refill pack: Item number: 410521 Testoval Chlorine DPD reagent refill pack Item number: 410520 Testoval Chlorine DPD 0.1 - 1 mg/l test kit

With the Testoval Chlorine DPD from Heyl, it is possible to obtain visual measurement results within a few minutes. The kit is perfectly suited for water samples in the range of 0.1 to 1 mg/l. Both low-dosed and slightly higher chlorine values within this range can be determined directly. Testoval Chlorine DPD 0.1 - 1 mg/l Test Kit – suitable for fast chlorine measurement The Testoval Chlorine DPD 0.1 1 mg/l test kit is a color comparison analysis set that allows you to visually determine the content of free and total chlorine in water. It covers a measuring range from 0.1 mg/l to 1 mg/l and is suitable for fast, manual water analyses. With this test kit, the amount of chlorine in the water is determined through an optical color comparison. Accordingly, this test kit is ideal for detecting chlorine concentration within a few minutes. Technical details and contents of the test kit Complete color comparison kit Color comparator Reagents A, B and C Measuring spoon Measuring tube Cuvette Approx. 70 measurements possible with the included reagents Measurement time – approx. 1 minute per analysis Why buy the Testoval Chlorine DPD from Heyl? Intuitive measurement via color comparison instead of a digital device Fast results in only ~1 minute Ideal for free and total chlorine in drinking and process water Compact equipment for mobile and fast measurement Possible applications Environment, industry and maintenance Disinfection systems Control of disinfection and cleaning processes Testing chlorine levels in drinking water or process water Refill packs: 1 set of reagents for approx. 70 analyses: Order no. 410521 Replacement color comparator: Order no. 410522