TESTOVAL colour comparison kit pH 8-12 for quick manual analysis of the pH value in water in the range pH 8 to 12. The individual values 8 mg/l, 8.5 mg/l, 9 mg/l, 10 mg/l, 11 mg/l and 12 mg/l can be read by visual colour comparison. In addition to the reagents, the scope of delivery includes a colour comparison device for easy concentration determination. Number of analyses: approx. 250 Measuring time: approx. 1 minute Also available in the shop: 1 set of reagents for approx. 250 analyses: Order no. 410611 Replacement colour comparison device: Order no. 410612

Heyl Testoval Phosphate Test Kit – Measure Phosphate Quickly by Hand Colorimetric test kit for easy determination of phosphate (P₂O₅) in water The Heyl Testoval Phosphate Test Kit allows simple and reliable determination of phosphate content (P₂O₅) in water samples. Measurement is performed colorimetrically via a visual color comparison and covers a range of 0 to 10 mg/L. The kit is a practical color comparison set for manual analysis of phosphate in water samples. The color develops within minutes after adding the reagents. By diluting the water sample 1:10 with distilled water, the measurement range can be extended tenfold. The kit allows for approximately 180 analyses in total. Fast Phosphate Analysis in Water Using Color Comparison The colorimetric method enables rapid determination of phosphate without complex equipment. After adding the reagents, the resulting color intensity is compared with a reference scale, allowing direct reading of the phosphate level. Due to its simplicity, the kit is ideal for routine checks, spot measurements, and applications where fast and reliable results are required. Typical Applications of the Phosphate Test Kit Manual phosphate determination is important in many areas of water analysis, particularly where nutrient levels must be monitored. Breweries Environmental monitoring Advantages of Phosphate Measurement with a Heyl Test Kit The Heyl Test Kit provides a simple, fast, and cost-effective way to measure phosphate content in water samples without the need for electronic devices or laboratory infrastructure. The colorimetric method delivers meaningful results within minutes. The main advantage: immediate results, allowing on-site assessment of whether phosphate levels are within acceptable limits, enabling quick response when needed. This is particularly useful for routine checks, spot measurements, or emergency testing. Easy handling: No special training or equipment required Mobility: Ideal for field measurements and decentralized applications Low cost: No purchase or maintenance of electronic devices needed Reliability: Proven method for reproducible results Flexibility: Can be used where no electricity or lab is available Why Phosphate Measurement Is Essential Phosphate is a key nutrient in water, but high concentrations can cause significant ecological and technical problems. Even small excesses can lead to algae growth, oxygen depletion, and deteriorating water quality. Regular phosphate monitoring is critical for: Environmental monitoring: Protect water bodies from over-fertilization Water treatment: Ensure compliance with legal limits Industry & breweries: Maintain stable process and product quality Wastewater management: Monitor the performance of treatment plants The Heyl Phosphate Test Kit enables fast, reliable, and lab-independent monitoring on site, allowing early trend detection and targeted interventions.

Testoval Silicate Test Kit – Color Comparison for Rapid Analysis Reliable manual determination of dissolved silicate in water The Testoval Silicate Test Kit is designed for rapid, manual analysis of silicate content in water in the concentration range of 0–10 mg/l SiO₂. 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 a visual color comparison. When reagents are added to the water sample, a characteristic color develops. The provided comparison scale allows easy reading of the concentration levels. By diluting the sample 1:10, the measurable range can be extended by a factor of 10. The kit allows for approximately 100 individual analyses, with each measurement taking about 19 minutes. Manual determination of dissolved silicate in water up to 10 mg/l The Testoval Silicate Test Kit enables reliable, manual analysis of dissolved silicate (SiO₂) in water. After adding the reagents, a characteristic color reaction occurs, which is evaluated using the included comparison scale. Diluting the water sample 1:10 allows flexible extension of the measurement range by a factor of 10. Why monitoring silicate in water is important Dissolved silicates play a crucial role in industrial water treatment, particularly in boiler feed water, cooling water, and reverse osmosis systems. Excessive silicate concentrations can lead to the formation of stubborn deposits (silicate scale), which are difficult to remove and significantly impair heat transfer and system efficiency. In membrane processes, silicate can also cause irreversible damage and significantly shorten membrane lifespan. Regular silicate monitoring allows early detection of limit exceedances, targeted process control, and prevention of costly system damage. The Testoval Silicate Test Kit thus supports safe process management and long-term operational reliability. 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 the concentration range 0-20 mg/l SO32-. Individual values ... 0.5 mg/l 1 mg/l 2.5 mg/l 5 mg/l 10 mg/l 20 mg/l ... can be read by visual color comparison.  In addition to the two reagents a color comparison device for easy determination of concentration is included in the supply. Analyses: approx. 150 Measuring time: approx. 3 minutes Also available in the shop: 1 set of reagents for approx. 150 analyses: Order no. 410635 Replacement sulphite colour comparison device: Order no. 410636

Replacement colour comparison kit (without cuvette), for rapid manual analysis of the aluminium content in water in the concentration range 0 to 1.5 mg/l Al. The Testoval Aluminium Colour Comparison Device is an analytical instrument that allows the aluminium content in water to be determined directly by colour comparison. To do this, place a water sample in a measuring tube and add the reagents. Then pour the liquid into a cuvette and insert it into the colour comparison device. After about six minutes, the water sample changes colour, which is then compared with the device’s colour scale. The individual values of 0 mg/l, 0.1 mg/l, 0.2 mg/l, 0.5 mg/l, 1 mg/l and 1.5 mg/l can be read off the colour comparison device by visual comparison. How does the colour comparison device work? The colour comparison device is part of the Testoval system. You take a defined water sample, add the appropriate reagents and observe the colour reaction. You then compare the resulting colour with the scale in the device to read the aluminium value. This method allows for quick and direct monitoring without the need for other measuring instruments. Features and benefits at a glance Used for simple manual determination of the aluminium content in water Supplied with an integrated colour scale that allows direct reading Practical for mobile testing and ad hoc checks Can be equipped with appropriate reagents as required

Spare color comparator without cuvette, TESTOVAL Chloride for fast manual analysis of the chloride content in water in the concentration range 0-100 mg/l Cl.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. Only a color comparator for simple concentration determination is included in the scope of delivery.A set of reagents for approx. 40 analyses or a complete set can be ordered separately.Number of analyses: approx. 40 Measuring time: approx. 3 minutesAlso in our assortment: Refill kit: 1 set of TESTOVAL Chloride reagents for approx. 40 analyses: Order no. 410527 Complete set of color comparison kit TESTOVAL Chloride: Order No. 410526

Testoval Nitrite Colour Comparison Kit or Replacement Colour Comparison Kit (without cuvette), for rapid manual analysis of the nitrite content in water within the concentration range 0–1 mg/l NO₂. The Testoval Nitrite Colour Comparison Device is the ideal measuring instrument for nitrite tests using reagents. It allows water samples to be analysed quickly and clearly by comparing the resulting colour directly with a scale. Precise analysis of the nitrite test The nitrite colour comparison device is designed to reliably read the colour reaction of a water sample. Once the water has been mixed with the reagents, a specific colour appears, and it is precisely this colour that can be compared with the integrated scale. This allows the nitrite content in the water to be reliably determined. Suitable for Testoval reagents and test kits The colour comparison device is specifically designed for the Testoval system and only works in conjunction with the appropriate reagents and test kits. It is an essential part of the measurement process, helping to ensure the results are read correctly.

Replacement color comparator without cuvette, for fast manual analysis of the pH value in water in the range pH 8 to 12.The individual values 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. Only the color comparator for simple concentration determination is included in the scope of delivery.Measuring time: approx. 1 minuteAlso in our assortment: 1 set of Testoval pH 8-12 reagents for approx. 250 analyses: order no. 410617 Complete test set Testoval pH 8-12: Order no. 410616

Water Hardness DUO Titration Kit – Flexible Hardness Analysis For precise measurement of water hardness The Water Hardness DUO Titration Kit is designed to measure water hardness in raw water (30–80 °dH) and treated water (0–2 °dH). With the DUO kit, you can reliably determine the hardness of both raw and treated water. The set includes all necessary reagents and accessories for immediate use. Precise Determination of Water Hardness in Raw and Treated Water The Water Hardness DUO Titration Kit provides a flexible and reliable analysis of water hardness for both raw and treated water. It covers a wide measurement range from 30–80 °dH in raw water and 0–2 °dH in treated water, making it ideal for various applications in water treatment. The kit is designed for users who require fast and accurate hardness measurements, whether for untreated raw water or softened water. Advantages of the Water Hardness DUO Titration Kit With the DUO titration kit, two measurement ranges can be covered with a single set. This reduces the need for separate measurement systems and allows efficient monitoring of water hardness before and after treatment. The set includes all necessary reagents and accessories for immediate use. The manual titration method delivers precise and reproducible results and is particularly suitable for control measurements, commissioning, or mobile applications in 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.