Water Hardness Meter

1. Water Hardness Meter Product Introduction

Water Hardness Meter converts the hardness value into an electrical output by measuring the concentration of calcium and magnesium ions in the water.The S2Water Hardness Meter is made of calcium-magnesium selective electrodes based on PVC membranes and is used to test the total hardness of water (measured in CaCO3) with temperature compensation to ensure that the test is fast, simple, accurate and economical. This user manual details the technical parameters, use, maintenance and communication protocols of the total hardness sensor.

Signal output: RS-485 bus, ModbusRTU protocol, convenient for connection to third-party devices such as PLC, DCS, industrial control computers, general controllers, paperless recording instruments or touch screens.

Patented calcium and magnesium ion electrodes, the internal reference solution seeps out of the microporous salt bridge very slowly under a pressure of at least 100KPa (1Bar). Such a reference system is very stable, and the electrode life is longer than that of ordinary industrial electrodes.

Easy to install: 3/4NPT pipe thread, easy to install in pipelines and tanks.

IP68 protection grade.

2. Water Hardness Meter Technical Parameters

3. Water Hardness Meter Maintenance and Care

1. Use and maintenance

Before testing, the electrode should be immersed in tap water for 48 hours. After activation, it should be cleaned in deionized water. If the electrode is not used for a long time (more than two weeks), it should be stored dry, and the sensing element of the electrode should be put into the protective cap.

Check whether the terminal is dry. If there is any stain, wipe it with anhydrous alcohol and use it after drying. Avoid long-term immersion in distilled water or protein solution, and prevent contact with silicone grease. The PVC film of the electrode that has been used for a long time may become translucent or have sediment. In this case, it can be rinsed with distilled water (or deionized water). If the electrode has been used for a long time and measurement errors occur, it must be calibrated.

If the electrode cannot be calibrated and measured after being maintained and serviced in the above manner, it means that the electrode has failed. Please replace the electrode.

2. Sensor Calibration

Note: The sensor has been calibrated before leaving the factory. Do not calibrate it unless the measurement error is exceeded.

a) Zero point calibration

Place the sensor in the zero point standard solution, wait for 10 minutes, and after the value stabilizes, check whether the displayed value is within the error range. If not, zero point calibration is required. Refer to the appendix for calibration instructions.

b) Slope calibration

Place the sensor in the slope standard solution, wait for 10 minutes, and after the value stabilizes, check whether the displayed value is within the error range. If not, slope calibration is required. For calibration instructions, refer to the appendix.