The Polyamine titration solution K26 + C reagent is a refill pack for the test kit item number 400167. The test kit is used to measure polyamine values in water samples. Polyamine refill pack titration solution K26 + C reagent Why is the refill pack useful? With the test kit, the polyamine values in your water samples can be visibly measured. The refill pack is ideal for providing consumables for repeated polyamine measurements and for continuing to use your test kit in a cost-efficient way. The refill pack consists of the appropriate titration solution as well as the C reagent in ready-to-use bottles with screw caps. Application areas for the Polyamine refill pack titration solution K26 + C reagent well water cooling circuits industrial process water water treatment systems

The refill pack Polyamine Titration Solution A-853R in a set of 10 bottles of 50 ml each is ideal for measuring low to medium polyamine concentrations. Polyamine Titration Solution A-853R (10 bottles á 50ml) The Polyamine Titration Solution A 853R is specially developed for the precise analysis of polyamines in industrial water systems. It serves as a refill solution for the A 853R test kit from Heyl and enables reliable monitoring of the dosing of polyamines and water treatment chemicals. It is suitable for low to medium polyamine concentrations, ideal for circulation and cooling water systems with standardized dosing. Why buy the Polyamine Titration Solution A-853R from Heyl? reliable analysis of polyamines in circulation and cooling water systems fast, reproducible results stable reagent quality for consistent measurements easy application in the laboratory and on site specially matched to the A 853R test kit Possible applications Water treatment Routine monitoring in power plants Pharmaceutical and food industry Laboratory analyses This solution is only compatible with the A 853R test kit and must not be used with other polyamine test kits.

The polyamine titration solution in a pack of 10 bottles of 50 ml each is a refill solution for the CCOH polyamine test kit from Heyl. Polyamine Titration Solution CCOH (10 bottles á 50 ml) Polyamine Titration Solution CCOH – Application and Benefits The polyamine titration solution CCOH is used to accurately analyze polyamine concentrations in water systems. It enables reliable monitoring of chemical dosing. Thanks to its stable composition, it is suitable for both laboratory testing and quick measurements directly on site. The polyamine CCOH solution is highly accurate and is perfect for higher requirements in dosing control. Possible applications of the CCOH test kit from Heyl Evaporative cooling systems and cooling towers Circulating water systems Laboratory analyses and routine checks Power plants and energy facilities Advantages of the titration solution Reliable measurement Ideal for industrial systems Stable reagent quality for consistent results Compatible with polyamine test kits The polyamine titration solution CCOH is intended exclusively for use with the corresponding CCOH test kit and is not compatible with other polyamine test kits. CCOH Polyamine Test Kit – Item number: 400165

The refill solution Polyamine Titration Solution V15/30 is suitable for the Polyamine Test Kit V15/30. It supports the control of polyamine dosing. Polyamine Titration Solution V 15/30 (10 bottles á 50ml) The Polyamine Titration Solution V 15/30 is used for the precise determination of polyamine content in industrial water systems. It is specifically designed for the V 15/30 test kits from Heyl and supports the control of polyamine and water treatment chemical dosing. The solution is suitable for both laboratory analyses and quick measurements directly on site. Ideally suited for small to medium polyamine concentrations. Why the Polyamine Titration Solution? Reliable determination High measurement accuracy Fast and easy application in the laboratory or on site Optimizes water treatment and corrosion protection Compatible with the V 15/30 test kit (#400166) Applications Evaporative cooling systems and cooling towers Metal processing and electroplating facilities Quality assurance in industrial water systems Ideal for mobile on-site measurements by service and maintenance technicians The titration solution V 15/30 is only compatible with the V 15/30 test kit (item number 400166) and must not be used with other polyamine test kits.

The Polyamine Titration Solution CCOH + C Reagent Refill Pack contains replacement chemicals for polyamine titration measurements. Replacement reagent for polyamine titration – simply top up This refill pack contains Reagent C (1 x 50 ml C reagent) and the titration solution (1 x 50 ml CCOH). These reagents are required for the titration measurement of polyamines. Simply refill and carry on working Replacing the old solution with the fresh reagent is straightforward and takes just a few steps Compatible with all relevant polyamine titration kits Continues to enable reliable and comparable measurements Convenient for users who frequently need to perform titrations

Polyamine NI Reagents A + B Refill Pack The refill pack contains replacement chemicals for compatible polyamine test kits. Reagents for Your Polyamine Test – Easy Refilling When the reagents in your polyamine test kit are used up, there is no need to replace the entire set. The refill pack includes both required reagents, A and B, which are necessary for the color reaction during measurement. Simply replace the old chemicals with the new ones. The reagents are specifically matched to polyamine test kits, ensuring your measurements remain clear, consistent, and comparable. Cost-Effective and Sustainable The refill pack is particularly suitable for users who regularly use their test kit. There is no need to purchase a new set; simply replace the consumed reagents. Using the correct chemicals ensures that measurement results remain reliable and comparable over time. Note: The Polyamine NI refill pack (Reagents A + B) is universally compatible with all polyamine test kits.

The refill pack of polyamine titration solution contains 10 bottles of 50 ml each. It is compatible with the Polyamine Test Kit B42/C71. Refill Pack Polyamine Titration Solution B42/C71 (10 bottles á 50ml) The titration solution is specially designed for the B42/C71 test kit and enables reliable control of polyamine dosing. The Polyamine Titration Solution B42/C71 is used for the precise determination of polyamine content in technical water systems. It is suitable for both laboratory analyses and quick on-site measurements. Ideal for the medium measuring range and precise dosing control. Why buy the Polyamine Titration Solution B42/C71 from Heyl? fast and reproducible results easy handling for routine checks practical for service and maintenance operations suitable for laboratory analyses and on-site measurements specially matched to the B42/C71 test kit (#400168) Examples of applications Circulating water systems in industrial plants Water treatment systems Pharmaceutical and food industry for process water Routine analyses in the laboratory or directly at the plant This titration solution is intended exclusively for the B42/C71 test kit (item number 400168) and is not compatible with other polyamine test kits.

This polyamine refill pack contains the titration solution B42/C71 and two C reagents. It is the refill packaging for the polyamine test kit B42/C71 (item no. 400168). Refill pack Polyamine titration solution B42/C71 + reagent C Why buy the refill pack instead of a new test kit? The refill pack contains the titration solution B42/C71 and two C reagents, which are also included in the test kit. The refill pack is ideal for providing consumables for repeated polyamine measurements and for continuing to use your test kit in a cost-efficient way. Application examples laboratory water and wastewater analysis food and beverage control biotechnology & pharmaceuticals

This set contains the titration solution V 15/30 as well as two refill packs of the C reagent for the Polyamine test kit V 15/30 (item number: 400166). Ideal for precise and reliable measurement of polyamines in laboratory samples and other application areas. Refill pack Polyamine titration solution V 15/30 + C reagent Why the refill pack makes sense? The refill pack for the Polyamine test kit V 15/30 is ideal for determining measurement values between 15 mg/l and 30 mg/l. It is used to measure and determine whether the polyamine value is within a defined range. In terms of sustainability and cost efficiency, purchasing a refill pack saves you from having to buy a completely new test kit. Various application areas for the Polyamine test kit V 15/30 refill set well water cooling circuits process water or industrial applications

The refill pack for the Polyamine A-853R test kit (400192) contains one A-853R titration solution as well as two C reagents. Refill pack Polyamine titration solution A-853R + reagent C Why buy the refill pack online? This refill pack contains the A 853R titration solution as well as reagent C for your polyamine test kit. Ideal for continuous and precise measurement of polyamines without the need to purchase a new test kit. Application areas laboratory analyses water and wastewater analysis biotechnology & pharmaceuticals

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