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    Picture of Water Quality ORP Sensor, -1500mV~+1500mV Picture of Water Quality ORP Sensor, -1500mV~+1500mV Picture of Water Quality ORP Sensor, -1500mV~+1500mV

    Water Quality ORP Sensor, -1500mV~+1500mV

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    SKU: SUCH-WQS-406C
    $650.79
    ● -1500mV~+1500mV ● 1 mV resolution ● RS485/ 4-20mA ● Platinum electrode method
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    🚚 Free shipping
    🕒 Delivery date: 6-12 days
    🔁 30-day Returns
    Overview

    High-performance water quality ORP sensor equipped with platinum electrode measurement principle, wide measurement range from -1500 ~ +1500mV, high resolution of 1mV and accuracy of ±20mV, enabling rapid capture of redox changes. The water quality sensor offers optional RS485 (Modbus/RTU) and 4-20mA outputs. It supports 3/4 NPT submersible installation, operates on 12–24VDC power supply, and incorporates an ultra-low power consumption design.

    Feature

    ORP sensor feature

    • SUCH ORP sensors are used for environmental water quality monitoring, acid/alkali/salt solutions, chemical reaction processes, and industrial production processes, meeting the requirements for online ORP measurement in most industrial applications.
    • Signal Output: RS-485 (Modbus/RTU protocol). Conveniently connects to third-party devices such as PLCs, DCS systems, industrial control computers, or touchscreens. Dual high-impedance differential amplifiers provide strong anti-interference capability and fast response speed.
    • Professional ORP Electrode: Internal reference solution permeates extremely slowly through a microporous salt bridge under at least 100 kPa (1 bar) pressure. This forward permeation persists for over 20 months, ensuring exceptional stability in the reference system of water quality ORP sensors and significantly extending electrode lifespan compared to standard industrial electrodes.
    • Easy Installation: Equipped with a 3/4 NPT pipe thread for convenient submersible installation or mounting on pipes and tanks. IP68 protection rating ensures reliable operation in demanding environments.

    Dimension (unit: mm)

    ORP sensor dimension

    Wiring Instruction

    ORP sensor wiring instruction

    Wiring Instructions:

    • Carefully verify the wiring sequence before energizing to prevent unnecessary damage from incorrect connections.
    • Considering cables may be submerged in water (including seawater) or exposed to air for extended periods, all wiring connections require waterproofing. User cables should possess adequate corrosion resistance.

    Usage Scenarios

    ORP sensor usage scenarios

    Specs
    Measurement Range -1500 to +1500 mV
    Measurement Principle Platinum electrode method
    Resolution 1mV
    Accuracy ±20mV
    Response Time T90 < 30s
    Calibration Method Single-point calibration
    Cleaning Method /
    Temperature Compensation /
    Output Method RS-485 (Modbus/RTU)/4-20mA
    Storage Temperature -5 to 65°C
    Operating Conditions 0 to 50°C, <0.2 MPa
    Mounting Method Submersible installation, 3/4 NPT pipe thread
    Power Consumption 0.2W @12V
    Power Supply 12 to 24VDC
    Protection Rating IP68
    Cable Length 5 meters, other lengths customizable
    Housing Material ABS
    Application

    ORP sensor for wastewater treatment

    Wastewater Treatment

    ORP sensor for drinking water chlorinationDrinking Water Chlorination

    ORP sensor for swimming pool water qualitySwimming Pool Water Quality

    FAQ
    ❯

    An ORP (Oxidation-Reduction Potential) sensor measures the overall reactivity of oxidizing or reducing substances in water, expressed in millivolts (mV). It indicates whether water possesses bactericidal properties and whether it exists in a reducing or oxidizing environment. ORP sensors are commonly used in wastewater treatment, tap water monitoring, swimming pools, aquaculture, and industrial processes. Higher ORP values typically indicate stronger oxidizing power and more effective disinfection, while lower values suggest a more reducing environment in the water.

    ❯

    ORP is inherently less affected by temperature than pH, which necessitates temperature compensation. However, changes in water temperature can indirectly influence chemical reaction rates, causing slight fluctuations in ORP readings. Some sensors incorporate built-in Pt1000 temperature sensors for data logging and stability enhancement.

    ❯

    ORP electrodes require regular cleaning to maintain sensitivity. Gently rinse the electrode surface with pure water. For oil, algae, or sediment buildup, briefly soak the electrode in cleaning solution. Keep electrodes moist during prolonged storage to prevent performance degradation from drying. Avoid prolonged immersion in strong acids or alkalis.

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