Controlling the residual hardness of water is a crucial aspect of clinical water treatment, as it has a major influence on the function and service life of water-bearing systems and medical devices. Residual hardness, expressed in degrees of German hardness (°dH), describes the amount of dissolved calcium and magnesium ions in the water. These ions are the main cause of limescale deposits, which can lead to blockages and loss of efficiency in pipes and equipment.
In hospitals and clinics, monitoring residual hardness is particularly important, as hard water can impair the function of equipment such as autoclaves, steam generators and other medical systems. Limescale deposits not only increase the need for maintenance, but can also jeopardise hygiene, as microorganisms can multiply in the deposits. Targeted monitoring and regulation of residual hardness ensures that water-bearing systems function smoothly and that high hygiene standards are maintained.
Controlling residual hardness helps to minimise limescale deposits, maximise the efficiency of equipment and reduce operating costs. By regularly checking and adjusting the residual hardness, clinics and hospitals can ensure that their water-bearing systems remain in optimum condition at all times and do not compromise on water quality.
LIMIT VALUE TEST KIT Liquid special indicator in dropper bottle for the monitoring of softened water, set for the limit values of 0.5 and 0.25 °dH (8,9 and 4,47 ppm). Description Complete with measuring tube and stopper Analyses: approx. 250 Measuring time: approx. ½ minute
Duroval TI Test Kit 0-30 °dH from Heyl – Industrial Water Hardness Analysis Titration test kit for determining total water hardness The Duroval TI Test Kit 0-30 °dH is an analysis set for precise determination of total water hardness in water samples via complexometric titration. The TI test kit provides fast and reliable results in the range of 0 to 30 °dH. In approximately 2 minutes, users receive meaningful measurements with an accuracy of 0.5 °dH. Contents of the test kit: Measuring tube Indicator Calibrated dosing pipette 0–30 °dH 30 ml titration solution Reliable Total Hardness Determination via Complexometric Titration The Duroval TI Test Kit 0–30 °dH is a professional analysis set from Heyl for precise determination of total water hardness in industrial and commercial applications. The proven complexometric titration method ensures accurate analysis of raw, process, and operational water across a wide measurement range. The test kit delivers fast and reproducible results. Within approximately 2 minutes, users obtain meaningful measurements with an accuracy of 0.5 °dH, making it ideal for routine checks and commissioning. Advantages of the Duroval TI Test Kit for Industrial Applications The Duroval TI Test Kit stands out due to its simple handling and high measurement reliability. The calibrated dosing pipette ensures precise addition of the titration solution, while the clear color change of the indicator enables accurate evaluation. The compact set is especially suitable for mobile measurements, service tasks, and regular checks in industrial water treatment. It provides a precise manual alternative to automated measurement systems and supports efficient quality and process monitoring. 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.