Residual hardness °dH
Residual hardness monitoring in water treatment
Residual hardness monitoring for process water is an essential part of water treatment in hospitals. It enables continuous control of the water hardness during the entire treatment process. Water hardness, which measures the magnesium and calcium content in water and is determined in German degrees of hardness (°dH), is a decisive factor here.
In hospitals, it is particularly important to ensure optimum water hardness in order to guarantee the functionality and longevity of medical equipment. Excessive water hardness can cause limescale deposits in complex medical devices, which impairs their efficiency and reliability. Conversely, too little water hardness (soft water) can lead to faster wear of metallic components and make the water more corrosive, which can also reduce the service life of the devices.
Our Testomat® EVO TH, which ensures extremely precise residual hardness monitoring, is particularly noteworthy. Alternatively, we offer the Testomat® 808, which also ensures reliable residual hardness monitoring. These devices guarantee that water treatment in clinics always meets the highest standards and that medical equipment is optimally protected.
The Testomat® EVO TH impresses with new functionalities:
- Optical water detection when filling the measuring chamber
- Import and export of settings
- Basic programming with selectable file name
- Logging of measurement data and messages/alarms using an integrated SD or optional SDHC card (2 GByte)
- Firmware update via SD card
- LCD graphic display
- Multilingual menu navigation with simple switchover (internal programming is retained)
- Integrated self-test with continuous monitoring
- External clear/acknowledge input
- Integrated self-test with continuous monitoring
- External clear/acknowledge input /acknowledgement input
- Automatic venting of the dosing hoses
- Doors can be changed individually
- Limit value monitoring (falling below limit value 1 / exceeding limit value 2)
- Free programmable number of low water pressure times (for systems with temporarily low water pressure)
Proven performance profile:
- High-precision titration by dosing pump (by means of piston dosing pump)
- Reliable and low-maintenance operation
- Minimal indicator and water consumption
- Analogue output: 0/4-20 mA for measurement results and RS 232 for measurement data and messages/alarms
- Programmable hardness unit in °dH, °f, ppm CaCo3, mmol/l
- 2 independent limit values with adjustable switching functions as well as switching option after adjustable number of bad analyses
- Analysis triggering:
- Quantity-dependent via contact water meter
- Automatic interval operation (0-99 minutes)
- Indicator quantities: 100 and 500 ml bottles
Other advantages at a glance:
- Certified actual value analyser in accordance with WHÜ and UL
- Certified for 72 hours BOB (WHÜ)
- The most cost-effective stand-alone actual value analyser
- Additional indicator type TH2050 available
- SD card for data & measured value recording is standard on site
- Control of e.g. e.g. coolers via AUX relay, 4-20 mA measured value transmission
- Advanced language selection for menu navigation
- External analysis triggering (START/STOP relay)
- Soltware upgrade for integrated calibration function (Testomat® EVO TH Cal)
Filter products
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.
Testomat 808: Continuous Hardness Limit Monitoring Online measurement of residual water hardness with automatic color change Measurement Principle and Technical Features Modern indicator pump system supporting an automated process with minimal reagent and water consumption. Internal and external flushing options, manual safety check for up to 72 hours of unattended operation (BOB operation), and interfaces for 4–20 mA signals and RS232 firmware updates. Purchase Benefits 3% shop discount when purchasing a Testomat 808 Free of charge: original Heyl indicator for hardness measurement
The Testomat® 808 is a compact analyser for online measurement of water hardness according to the principle of "limit value monitoring with colour change" in the measuring range 0.02 - 5 ° dH (0.4 - 89 ppm). Applications of the continuous residual hardness monitoring are e.g.: Reverse osmosis systems, boiler feed water supply Soft water for commercial purposes, ultrapure water systems. In view of the fact that the Testomat® 808 is suitable for use in multi-parameter systems due to its 4-20mA signal output, we hereby offer you the Testomat® 808 in conjunction with the NeoTecMaster® Multicontroller, which was specially developed by our company, as a package solution at a preferential price. The 4-channel NeoTecMaster® Multicontroller included in this package enables the processing of up to four measurement signals. Via the 4-20mA NeoTec slave input module connected to the NeoTecMaster®, the data is transmitted to the NeoTecMaster® and used to display the measured value, the trend and the status messages on the 5-inch screen. In addition, the NeoTecMaster® has an RS232 interface as well as a Modbus RTU input, which you can use freely after brief technical consultation with us. (Pre-check whether your existing measurement technology to be integrated requires adjustments). The NeoTecMaster® can be systematically supplemented with further optional NeoTec modules (function / signal converter modules) as required. This allows the future realisation of further control concepts in a flexible way. Two modules which fundamentally extend the range of functions and are already included in the scope of delivery are our NeoTec slave relay module and the 4x 4-20mA input module. This allows you to add potential-free relay contacts to the overall system and to integrate and visualise further system technology such as sensors via the 4x 4-20mA input module. You can freely assign the relay contacts to the incoming measurement signals and thus, for example, implement simple limit value-related control concepts as well as output measurement value-related messages. Further advantages of the NeoTecMaster: Simple operation Integration of the Testomat® device world, here in connection with the Testomat® 808 Integration into the existing control cabinet, alternatively we offer our NeoTecMaster® enclosure Modular range of functions can be extended by NeoTec slave and signal converter modules (measurement, control, regulation) Available as built-in or surface-mounted variant Structured continuous data recording on the integrated SD card or optionally available SDHC card (2Gbyte) as a file in CSV format In addition, there are the proven functionalities of the Testomat® 808: Indication of limit value undershoot or overshoot: green / red LED Modern indicator pump system Automatic measuring sequence with low water consumption Direct error and indicator quantity display Internal and external flushing of the measuring chamber by manual control Control of an external flush valve Three potential-free relays for: External flush valve control Limit value evaluation External control and / or alarm processing Safety check for 72-hour operation without supervision Indicator quantities: 100 and 500 ml bottles 4 - 20 mA interface for defined status and error messages RS 232 interface for firmware updates General information Water connection and operating pressure: Depending on unit version: 0.3 - 1 bar / 0.3 x 105 to 4 x 105 Pa 1 - 4 bar / 1 x 105 to 4 x 105 Pa (from 4 to 8 bar, a pressure reducer must be used (special accessory)) Water inlet: opaque hose with 6 mm outer diameter/4 mm inner diameter Water outlet: hose with 6 mm outer diameter/4 mm inner diameter Water temperature: 10 to 40 °C From 4 bar, a separately available pressure reducer must be used. Please use only the indicators approved for Testomat® 808! Optional accessories: NeoTecMaster unit hood
Precise Water Hardness Analysis for Automated Process and System Monitoring with the Testomat EVO TH Fully automatic water hardness determination via titration The Testomat EVO automatically detects the water level when filling the measuring chamber and can also operate for extended periods in BOB mode without constant supervision. With an integrated SD card or optionally an SDHC card (2 GB), measurement data and messages/alarms can be recorded. The menu is available in multiple languages, and firmware updates can be conveniently applied via the SD card. Analog outputs and serial interfaces allow external processing of measurement data. Certified and Cost-Effective Standalone Water Hardness Meter With the Testomat EVO, you benefit from stable, low-maintenance continuous operation, minimal consumption of indicator solution and water, as well as versatile data communication via RS232 or 0/4–20 mA signals. Certification according to relevant safety and TÜV standards (WÜH certification for boiler houses) and the compact design make the EVO a robust and efficient solution for demanding measurement tasks. Applications for the Testomat EVO Water treatment Drinking water systems Industrial boilers Process water monitoring When purchasing the Testomat EVO online, you receive, in addition to a 3 % online discount on Heyl devices, a free indicator of your choice.