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

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.

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