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High-Precision China ORP Meter Water Quality Sensor - Digital Electrode Probe from Reliable Suppliers & Factory

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The LMS-ORP100 ORP Sensor is a highly precise digital electrode probe designed for accurate oxidation-reduction potential (ORP) measurement in various water quality applications. This sensor, manufactured in China, utilizes an ionic electrode method to provide a wide measurement range of ±1000.0 mV with an impressive accuracy of 0.1 mV. Built with durable polymer plastic and a compact, flat-structure design, it is resistant to breakage and easy to clean, making it ideal for continuous use in diverse environments. The LMS-ORP100 supports both automatic and manual temperature compensation, along with RS485 communication using the Modbus RTU protocol. As a factory direct product, it is perfect for applications in environmental monitoring, industrial processes, aquaculture, and laboratory research, providing reliable performance for suppliers and researchers alike.

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    Product Parameters

    Product Name

    ORP sensor

    Model

    LMS-ORP100

    Measurement method

    Ionic electrode

    Range

    ±1000.0 mV

    Accuracy

    0.1 mV

    Power

    9–24 VDC (Recommend 12 VDC)

    Voltage

    8–24 VDC (55mA / 12V)

    Material

    Polymer Plastic

    Size

    31mm × 140mm

    Output

    RS-485, MODBUS protocol

    Product Features
    High-Accuracy ORP Measurement

    Employs an advanced ionic electrode method to deliver precise and stable ORP readings up to ±1000.0 mV with a resolution of 0.1 mV.

    Robust and Compact Design

    Constructed with polymer plastic and a flat bubble structure, the sensor is durable, easy to clean, and resistant to damage.

    Temperature Compensation Support

    Allows both automatic and manual temperature compensation for improved accuracy under varying environmental conditions.

    Modbus RTU Communication

    Integrated RS485 interface supports the Modbus RTU protocol, enabling seamless integration with data loggers and control systems.

    Anti-Interference and Stable Performance

    Features an isolated power supply design that ensures data stability and strong anti-interference capability in noisy electrical environments.

    X2X6
    Applications
    application
    Industrial Wastewater Treatment

    In chemical, electroplating, or printing and dyeing industries, the sensor monitors ORP during wastewater oxidation/reduction processes (e.g., removing heavy metals or organic pollutants). It helps operators confirm whether the reaction is complete (e.g., sufficient oxidant dosage) and ensures treated wastewater meets discharge standards, reducing environmental pollution.

    Aquaculture Water Quality Management

    In fish, shrimp, or shellfish farms (especially recirculating aquaculture systems), ORP reflects the level of organic matter and dissolved oxygen in water. Low ORP often indicates poor water quality and high disease risk. The sensor provides real-time data, allowing farmers to adjust aeration or add microbial agents timely, maintaining a healthy aquatic environment and improving breeding survival rates.

    Environmental Water Quality Monitoring

    For surface water (rivers, lakes, reservoirs) and groundwater, the sensor measures ORP to assess ecological health and pollution status. For example, abnormal ORP fluctuations may indicate sewage inflow; long-term data tracking can also evaluate the effectiveness of ecological restoration projects (e.g., lake eutrophication control), providing support for environmental protection departments.

    Drinking Water Safety Supervision

    In water treatment plants, the sensor is used in raw water pretreatment, disinfection (chlorine or ozone disinfection), and finished water storage. It ensures disinfection is thorough (sufficient oxidation to inactivate pathogens) while avoiding excessive disinfectant residues (which affect taste or produce harmful by-products). It also supports real-time monitoring of tap water pipelines, safeguarding end-user drinking water safety.

    Laboratory Scientific Research

    In environmental science, aquatic ecology, or water chemistry laboratories, the sensor provides high-precision ORP data for experiments. For example, it can analyze the oxidation behavior of pollutants, study the relationship between temperature/pH and ORP, or verify new water treatment technologies—supporting the development of scientific theories and practical applications.

    Swimming Pool & Recreational Water Maintenance

    In public swimming pools, water parks, or spas, ORP (typically 650–750 mV) is a key indicator of disinfection effectiveness. The sensor monitors ORP continuously, enabling automatic adjustment of chlorine dosage. This reduces manual monitoring efforts and prevents bacterial growth (e.g., Legionella), ensuring a safe and hygienic water environment for users.

    X9X8
    Digital RS485 Water Quality Sensors Technical Data
    Digital RS485 Water Quality Sensors Technical Data
    No. Picture Product Name Model Range Accuracy Resolution
    1 Digital RS4851 DO sensor LMS-DO10B 0–20 mg/L, 0–60℃ ±0.1–0.3 mg/L 0.01 mg/L
    2 Digital RS4852 DO sensor LMS-DO10C 0–20 mg/L, 0–60℃ ±0.3 mg/L 0.01 mg/L
    3 Digital RS4853 Trace DO sensor LMS-TDO100 0–2000 ppb, 0–50℃ ±1 ppb 1 ppb
    4 Digital RS4854 PH sensor LMS-PH100 0–14 pH ±0.02 pH 0.01 pH
    5 Digital RS4854 ORP sensor LMS-ORP100 ±1000.0 mV ±0.2 mV 0.1 mV
    6 Digital RS4856 EC/TDS sensor LMS-TDS102 CT: 0–9999 uS/cm; 0–100 mS/cm; TDS: 0–10000 ppm ±2.5% FS 1 uS/cm, 0.01 mS/cm, 1 ppm
    7 Digital RS4857 Salinity/EC/TDS sensor LMS-SAL104 Conductivity: 0.1–500 mS/cm; TDS: 0–60000 ppm; Salinity: 0–500.00 ppt ±1.5% FS 1 uS/cm, 0.01 mS/cm, 1 ppm, 0.01 ppt
    8 Digital RS4858 COD sensor LMS-COD100 COD: 0.1–1500 mg/L; TOC: 0.1–750 mg/L; BOD: 0.1–900 mg/L; Turbidity: 0.1–4000 NTU; Temp: 0–50℃ ±5% equiv.KHP; Temp: ±0.5℃ 0.01 mg/L equiv.KHP
    9 Digital RS4859 TSS sensor LMS-TSS100 0–50000 mg/L / 0–120000 mg/L ±10% FS or 10 mg/L 0.1 mg/L or 1 mg/L
    10 Digital RS48510 Turbidity sensor LMS-TUR10L 0–100 NTU ±10% FS or 0.3 NTU 0.01 NTU
    11 Digital RS48510 Turbidity sensor LMS-TUR10H 0–3000 NTU ±10% FS or 0.3 NTU 0.01 NTU
    12 Digital RS48512 CO2 sensor LMS-CO2100 2000 PPM / 10000 PPM / 50000 PPM ±5% FS 1 ppm
    13 Digital RS48513 Ammonia Nitrogen sensor LMS-NH4100 0–1000 mg/L ±5% FS
    14 Digital RS48513 Ion Selective sensor LMS-ION100 0–1000 mg/L ±5% FS
    15 Digital RS48510 Oil in Water sensor LMS-OIL100 0–50 mg/L; 0–5 mg/L ±3% FS 0.01 ppm
    16 Digital RS48510 Chlorophyll sensor LMS-CHL100 0–500 ug/L ±3% FS 0.1 ug/L
    17 Digital RS48510 Blue-Green Algae sensor LMS-BGA100 0–2,000,000 cells/ml ±3% FS
    18 Digital RS48518 Residual Chlorine sensor LMS-HCLO100 0–20.00 ppm ±5% FS 0.001 / 0.01 ppm
    19 Digital RS48519 Marine Current sensor LMS-Current100 Temp: −3℃–45℃; Velocity: 0–500 cm/s; Direction: 0–359.9° ±0.05℃; ±1 cm/s or ±2%; ±2° Temp: 0.001℃; Velocity: 0.1 cm/s; Direction: 0.1°
    Water Quality Analyzer Equipment
    No. Picture Product Name Model Size Power Display Output
    20 Digital RS48520 Portable DO Analyzer LMS-PA100 100mm × 204mm <0.5 W; Power supply 7.5V, 5 batteries LCD display screen
    21 Digital RS48521 Multi-parameter Portable Water Analyzer LMS-PA100P 220mm × 120mm × 100mm Rechargeable lithium battery with 220V DC charging adapter LCD display screen
    22 Digital RS48522 Multi-parameter Touch-screen Online Analyzer LMS-OA200T 180mm × 230mm × 100mm AC power supply: 220 VAC 7-inch touch screen
    Frequently Asked Questions (FAQ)
    Q What is the measurement range and accuracy of the LMS-ORP100 ORP sensor?
    The LMS-ORP100 ORP sensor has a measurement range of ±1000.0 mV with a resolution of 0.1 mV. It uses an ionic electrode method to ensure precise and stable readings in various water quality monitoring applications.
    Q What communication protocol does the LMS-ORP100 support?
    The LMS-ORP100 features an RS-485 output interface with Modbus RTU protocol support. This allows seamless integration with PLCs, data loggers, SCADA systems, and other industrial control equipment.
    Q Does the ORP sensor support temperature compensation?
    Yes. The LMS-ORP100 supports both automatic and manual temperature compensation, ensuring measurement accuracy is maintained even when the water temperature fluctuates significantly during operation.
    Q What are the typical applications of the LMS-ORP100 ORP sensor?
    The LMS-ORP100 is widely used in industrial wastewater treatment, aquaculture water quality management, environmental water quality monitoring, drinking water safety supervision, laboratory scientific research, and swimming pool or recreational water maintenance.
    Q What power supply is required for the LMS-ORP100 sensor?
    The sensor operates on a power supply of 9–24 VDC, with 12 VDC recommended for optimal performance. The working voltage range is 8–24 VDC with a current consumption of approximately 55 mA at 12V.
    Q How does the isolated power supply design benefit the ORP sensor's performance?
    The isolated power supply design effectively eliminates electrical interference from surrounding equipment, ensuring stable and reliable data output in complex industrial or outdoor environments. This makes the sensor particularly suitable for deployment in electrically noisy settings such as factories or water treatment plants.

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