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    Picture of Water Quality Hardness Sensor, 0~1000 mg/L Picture of Water Quality Hardness Sensor, 0~1000 mg/L Picture of Water Quality Hardness Sensor, 0~1000 mg/L

    Water Quality Hardness Sensor, 0~1000 mg/L

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    SKU: SUCH-WQS-TH406
    $1,411.76
    ● 0~1000mg/L ● 0.1 mg/L resolution ● RS485/ 4-20mA ● Two-point calibration
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    🚚 Free shipping
    🕒 Delivery date: 6-12 days
    🔁 30-day Returns
    Overview

    High quality water hardness sensors for industrial online water quality monitoring are for sale. With a measurement range of 0–1000 mg/L and a resolution as high as 0.1 mg/L, they accurately reflect changes in calcium and magnesium ions in water. The water quality sensor incorporates built-in Pt1000 automatic temperature compensation, ensuring stable and reliable data across varying water temperatures. Supports RS485 (Modbus RTU) output with optional 4–20 mA signal. Housing options include POM+ABS or POM+316L, adaptable to diverse water quality environments.

    Feature

    Water hardness sensor feature

    • Signal Output: Water quality sensors offer optional RS485/4-20mA output configurations for seamless integration with third-party equipment such as PLCs, DCS systems, and industrial control computers.
    • Stable Reference System: The internal reference solution within the calcium-magnesium ion electrode permeates extremely slowly through the microporous salt bridge at a minimum pressure of 100 kPa (1 bar).
    • Easy Installation: The SUCH water hardness sensor features an IP68 protection rating and a 3/4 NPT pipe thread, facilitating submersible installation or mounting on pipes and tanks.

    Dimension (unit: mm)

    Water hardness sensor dimension

    Installation Method

    Water hardness sensor installation method

    Note: When installing the sensor, it must not be inverted or mounted horizontally; it must be installed at an angle of at least 15 degrees.

    Wiring Diagram

    Function Line Color Specifications
    Power Supply Red Wire Power Supply Positive Terminal (12–24VDC)
    Black Wire Power Supply Negative Terminal (GND)
    Communication Blue Wire 485A
    White Wire 485B
    Output Yellow Wire Current Output (optional—leave floating if not used)
    Note Before energizing, carefully inspect the wiring sequence to prevent unnecessary damage caused by incorrect connections.
    Explanation Considering that cables may be submerged in water (including seawater) or exposed to air for extended periods, all wiring connections must be waterproofed. User cables should possess adequate corrosion resistance.
    Specs
    Measuring Range 0~1000 mg/L
    Resolution 0.1 mg/L, 0.1°C
    Accuracy ±10% of reading, ±0.3°C
    Response Time T90 < 60s
    Minimum Detection Limit 0.1
    Calibration Method Two-point calibration
    Cleaning Method /
    Temperature Compensation Automatic temperature compensation (Pt1000)
    Output Method RS485 (Modbus RTU), 4–20 mA (optional)
    Storage Temperature −5 to 40°C
    Operating Conditions 0 to 40°C, ≤0.2 MPa, pH 4 to 10
    Mounting Method Submersible installation, 3/4 NPT
    Power Consumption 0.2 W @ 12 V
    Power Supply 12 to 24 VDC
    Housing Material POM and ABS, POM and 316L (optional)
    Protection Rating IP68
    Cable Length 5m, other lengths customizable
    Application

    Water hardness sensor for wastewater treatment

    Wastewater Treatment

    Chemical and pharmaceutical manufacturing

    Chemical & Pharmaceutical

    Water hardness sensor for aquaculture

    Aquaculture

    FAQ
    ❯

    Water hardness sensors detect calcium and magnesium ion concentrations in water, calculating hardness values through conductivity or optical methods. They are commonly used in drinking water, industrial water, and water treatment systems.

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    The water quality hardness sensors are widely used in tap water monitoring, boiler systems, reverse osmosis equipment, cooling circulation water, and industrial water quality online monitoring to help prevent scaling and equipment damage.

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    Avoid bubble interference, ensure stable water flow, and connect power and signal wiring according to specifications to guarantee accurate and reliable measurement data.

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