Replacement color comparator without cuvette, for the TESTOVAL Chlorine DPD color comparison set for the concentration range 0.1-1 mg/l free and total chlorine. 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. The three reagents are not included in the scope of delivery and can be ordered separately or also as a complete set. Analyses: approx. 70 Measuring time: approx. 1 minuteAlso in the assortment:1 set of reagents for approx. 70 analyses: Order no. 410521Complete set Testoval Chlorine DPD Method 0.1-1 mg/l: Order no. 410520

Colour comparison kit for the concentration range 0.1-1 mg/l Cl2 (free and total)   Individual values ... 0.1 mg/l 0.2 mg/l 0.3 mg/l 0.5 mg/l 0.75 mg/l 1 mg/l ... can be read by visual color comparison.    In addition to the three reagents a color comparison device for easy determination of concentration is included in the supply.   Analyses: approx. 70 Measuring time: approx. 1 minute   Refill packs: 1 set of reagents for approx. 70 analyses: Order no. 410521 Replacement colour comparison device: Order no. 410522

Color comparison kit for the rapid manual analysis of chlorine content in water in the concentration range 0.5-4 mg/l free and total chlorine. The individual values ... 0.5 mg/l 1 mg/l 1.5 mg/l 2 mg/l 3 mg/l 4 mg/l ... can be read by visual color comparison.  By diluting the water sample in a ratio of 1:10 with distilled water, the measuring range can be extended to 10 times the concentration. In addition to the two reagents a color comparison device for easy determination of concentration is included in the supply. Number of analysis: approx. 70 Measuring time: approx. 1 minutes Also in the range: 1 set of reagents for approx. 70 analyses: Order no. 410521 Replacement colour comparison device TESTOVAL Chlorine 0.5-4 mg/l: Order no. 410523

Color comparison kit for the rapid manual analysis of hexavalent chromium content in water in the concentration range 0-5 mg/l Cr. The individual values ... 0.1 mg/l, 0.25 mg/l 0.5 mg/l 1 mg/l 2.5 mg/l 5 mg/l ... can be read by visual color comparison.  By diluting the water sample in a ratio of 1:10 with distilled water, the measuring range can be extended to 10 times the concentration. In addition to the two reagents a color comparison device for easy determination of concentration is included in the supply. Number of analysis: approx. 180 Measuring time: approx. 3 minutes Also available from us: 1 set of reagents for approx. 70 analyses: Order no. 410533 Replacement colour comparison device: 410534

Spare color comparator TESTOVAL Iron for the concentration range 0-1 mg/l Fe.The individual values 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 by optical color comparison. By diluting the water sample 1:10 with distilled water, the measuring range can be extended to 10 times the concentration. Only a color comparator for simple concentration determination is included in the scope of delivery.Reagents or the complete colorimetric test kit are also available in the store. Analyses: approx. 100 Measuring time: approx. 7 minutesAlso in our assortment: 1 set of reagents for approx. 100 analyses: Order no.: 410548 Complete Testoval test kit Iron (II) + (III) dissolved 0-1 mg/l: Order no. 410547

Replacement color comparator without cuvette, for the concentration range 0-20 mg/l SO32-.The individual values 0.5 mg/l, 1 mg/l, 2.5 mg/l, 5 mg/l, 10 mg/l and 20 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. 19 minutesäAlso in our assortment: 1 set of reagents for approx. 150 analyses: Order No. 410635 Complete test kit TESTOVAL Sulfite: order no. 410634

Testoval Phosphate Color Comparison Device – Manual Measurement Replacement color comparison device for quick and easy determination of phosphate in water The Testoval Phosphate Color Comparison Device is designed for fast visual determination of phosphate content in water. Measurement is performed manually via color comparison. Without the use of additional electronic equipment, concentrations from 0.25 mg/L to 10 mg/L P₂O₅ can be read directly using the color scale. The Heyl Testoval is suitable for both routine checks and simple documentation of results. Fast Phosphate Measurement via Color Comparison Without Equipment The Heyl color comparison device is specifically designed for applications requiring fast results and ease of use. By diluting the water sample 1:10 with distilled water, the measurement range can be extended tenfold. With the Testoval Phosphate Color Comparison Device, approximately 180 analyses can be performed, making it an economical solution for routine monitoring. Typical Applications of the Phosphate Color Comparison Device Manual phosphate determination is a proven method in many areas of water analysis, particularly where electronic measurement devices are unavailable or unnecessary. Environmental monitoring Water and wastewater analysis Laboratory applications Advantages of Phosphate Measurement with the Heyl Testoval Kit The Heyl Testoval Phosphate Test Kit offers a reliable, fast, and user-friendly way to determine phosphate content (P₂O₅) in water samples—completely without electronic devices or lab infrastructure. Fast on-site results: The colorimetric measurement provides usable results within minutes, ideal for routine checks, spot measurements, and immediate decisions. Easy handling without equipment: No electronic devices, power supply, or software are needed. Results are read visually via a color scale, making the device robust, error-tolerant, and easy to use. High practicality and mobility: Compact design allows mobile use—in the field, at measurement points, or in operational settings. Perfect where laboratory analysis would be too complex or time-delayed. Accuracy for monitoring and control: Provides practical accuracy for environmental monitoring, water and wastewater analysis, and brewing, allowing limits to be checked and trends detected early. Economical and efficient: With around 180 analyses per kit, the Heyl Testoval offers a cost-effective solution for regular measurements without maintenance, calibration, or follow-up costs for equipment. Extendable measurement range: Simple sample dilution (1:10) allows flexible expansion of the measurement range, increasing usability for higher phosphate concentrations.

Color comparison kit for the rapid manual analysis of nitrite content in water in the concentration range 0-1 mg/l N02-. The individual values ... 0.05 mg/l 0.1 mg/l 0.2 mg/l 0.3 mg/l 0.5 mg/l 1 mg/l ... can be read by visual color comparison.  By diluting the water sample in a ratio of 1:10 with distilled water, the measuring range can be extended to 10 times the concentration.  In addition to the two reagents a color comparison device for easy determination of concentration is included in the supply. Number of analysis: approx. 100 Measuring time: approx. 15 minutes Also available in the shop: 1 set of reagents for approx. 100 analyses: Order no. 410581 Replacement colour comparison device: Order no.: 410582

Testoval® pH Chlor DPD Test Kit – Color Comparison for pH and Chlorine Quick and reliable determination of pH value and free and total chlorine in water The Testoval pH-Chlor DPD Test Kit is designed for rapid manual analysis of pH and chlorine. The pH measurement range is 6.8–8.0, while the chlorine content is measured in the range of 0–1 mg/L. The values pH 6.8, 7.4, and 8.0 as well as 0.1 mg/L, 0.5 mg/L, and 1.0 mg/L chlorine can be read safely using optical color comparison. Original Heyl Test Kit for Rapid Determination of pH and Chlorine The Testoval® pH-Chlor DPD Test Kit from Heyl is an original color comparison kit for rapid manual analysis of pH and both free and combined (total) chlorine in water. It was specifically developed for the requirements of swimming pool water monitoring. Advantages of the Original Testoval® pH-Chlor DPD Test Kit The Testoval® pH-Chlor DPD Test Kit combines two important water parameters in one set (pH and chlorine), enabling particularly efficient water analysis. With a measurement time of approximately 3 minutes per test, around 70 measurements can be performed – ideal for routine monitoring during operation. As an original Heyl product, the test kit ensures high measurement reliability, reproducible results, and maximum reagent compatibility. It helps operators maintain stable water quality, control disinfection processes, and reliably meet hygienic standards.

TESTOVAL colour comparison kit pH 5.5-8 for quick manual analysis of the pH value in water in the range pH 5.5 to 8. The individual values 5.5 mg/l, 6 mg/l, 6.5 mg/l, 7 mg/l, 7.5 mg/l and 8 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

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.

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

Spare color comparator without cuvette, for rapid manual analysis of aluminum content in water in the concentration range 0-1.5 mg/l Al. The individual values can be read by optical color comparison. By diluting the water sample in a ratio of 1:10 with distilled water, the measuring range can be extended to 10 times the concentration. The 2 reagents required for the simple concentration determination are not included in the scope of delivery of this color comparator.Refill packs:1 set of reagents for approx. 130 analyses: Order no. 410651Complete color comparison set incl. reagents and accessories: Order No.: 410650

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

Replacement color comparator without cuvette for rapid manual analysis of the nitrite content in water in the concentration range 0-1 mg/l N02.The individual values 0.05 mg/l, 0.1 mg/l, 0.2 mg/l, 0.3 mg/l, 0.5 mg/l and 1 mg/l can be read by optical color comparison. By diluting the water sample 1:10 with distilled water, the measuring range can be extended to 10 times the concentration. Only the color comparison device is included in the scope of delivery.  Measuring time: approx. 15 minutesAlso in our assortment: 1 set of reagents for approx. 100 analyses: order no. 410581 Complete colorimetric test kit nitrite: Order no.: 410580

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

The 500 ml bottles of the original Titromat TC2150 Reagent A can be used immediately without cumbersome decanting into the Titromat KH.

The 500 ml-bottles of original Titromat® TC 2010 Reagent A can be used immediately in the Titromat M1 without cumbersome filling and refilling. Measuring range: Carbonate hardness: 0.89 - 17.9 ppm CaC03 0.09 - 1.8 °f (resolution: 2 °f)

The 500 ml-bottles of original Titromat® TC 2010 Reagent B can be used immediately in the Titromat M1 without cumbersome filling and refilling.   Measuring range: Carbonate hardness: 0.89 - 17.9 ppm CaC03 0.09 - 1.8 °f (resolution: 2 °f)

The 500 ml-bottles of original Titromat® TC 2020 Reagent A can be used immediately in the Titromat M2 without cumbersome filling and refilling. Measuring range: Carbonate hardness: 0.89 - 35.8 ppm CaC03 (resolution: 0.89 ppm CaC03) 0.09 - 3.6 °f (resolution: 0.09 °f)

The 500 ml-bottles of original Titromat® TC 2020 Reagent B can be used immediately in the Titromat M2 without cumbersome filling and refilling.   Measuring range: Carbonate hardness: 0.89 - 35.8 ppm CaC03 (resolution: 0.89 ppm CaC03) 0.09 - 3.6 °f (resolution: 0.09 °f)

The 500 ml-bottle of original Titromat® TC 2060 Reagent A can be used immediately in the Titromat® KH without cumbersome filling and refilling. resolution: 2 °dH Measuring range: Carbonate hardness: 89,5 - 2685 ppm (resolution: 8,9 ppm) 35,8 - 1074 ppm (resolution: 35,8 ppm)