IoT product and technology solution provider

Smart Online Water Quality Sensor, LoRaWAN Sensor


Online Water quality sensors play an important role in detecting and evaluating the water quality and health status of drinking water, aquaculture, rivers, lakes, oceans, and industrial discharge water.ZONEWU's water quality sensors can mainly monitor water PH, EC, DO, Turbidity, Residual Chlorine, COD, Chlorophyll, Blue Green Alga, Ammonia Nitrogen, Suspended Solids, ORP, Ionic Class concentrations, etc., with High Stability, Measurement is quick, Strong adaptability. With the help of our water quality sensors and advanced technology, you can provide you with accurate and real-time data, so that you can take quick action to maintain or improve water quality.

  • RS485 Turbidity Sensor
    RS485 Turbidity Sensor 0-1000 NTU for Raw Wastewater
    The ZW-TB-PR integrated online turbidity sensor adopts the scattered light detection principle. During operation, a incident light beam penetrates the water sample. Turbidity particles within the sample scatter the light beam. The sensor measures the intensity of light scattered at 90 degrees to the incident path. By correlating the measured data with the built-in calibration standard, the system derives the true turbidity value. Post-processing includes linearization algorithm implementation, ensuring the final output is accurate, stable, and ready for system integration.


    Model No.:LW105D-TB(RS485)

    Use: Measure Turbidity of water
    Power Supply Mode: Battery or External DC
    LoRaWAN Mode: OTAA Class A/C
    Certificates: CE,ROHS,FCC,ISO and 11 patents certifications
    Customized support: OEM, ODM
    Warranty: 1 Year
  • OEM RS485 residual chlorine sensor
    RS485 Residual Chlorine Sensor No Reagent Low Maintenance
    This product is specially designed for the continuous online monitoring of residual chlorine in aqueous solutions. It is widely applied in drinking water treatment plants, canning factories, water distribution networks, swimming pools, cooling circulating water systems, and various water treatment projects, ensuring stable and reliable water quality detection.


    Model:ZW-YL-PR

    Use: Measure Chlorine of water
    Power Supply: 12-24VDC
    Output Signal: RS485/4-20mA
    Certificates: Measurement Certification
    Customized support: OEM, ODM
    Warranty: 1 Year
  • ZONEWU ORP Water Quality Sensor
    RS485 Output Online ORP Water Quality Sensor, IP68 Waterproof
    ZW-ORP-PR industrial-grade online ORP water quality sensor is specially designed for industrial scenarios. It has a measurement range of -1500~+1500mV and an accuracy of ±20mV. It supports RS485 (Modbus/RTU) communication and can seamlessly connect to industrial control equipment such as PLC and DCS. The product is equipped with a patented ORP electrode, whose service life is twice that of conventional electrodes. It has an IP68 high protection rating and a 3/4 NPT thread design, which is suitable for various installation methods. With strong anti-interference ability and fast response, it is widely used in online ORP detection in scenarios such as environmental water quality monitoring, chemical reactions, and industrial production.
    Model No.:ZW-ORP-PR(RS485)
    Use: Monitor Oxidation-Reduction Potential
    Power Supply Mode: DC12/24V
    Measuring Accuracy : ±20 mV
    Certificates: CE,ROHS,FCC,ISO and 11 patents certifications
    Customized support: OEM, ODM
    Warranty: 1 Year
  • Digital pH sensor
    RS485 Modbus pH Sensor IP68 Water Quality Probe
    Here’s a polished, professional, and SEO-friendly enriched version for your product description: This product is specially designed for environmental water quality monitoring, the detection of acid, alkali and salt solutions, real-time tracking of chemical reaction processes, and precise monitoring of **industrial production procedures. It delivers stable and reliable performance, enabling accurate online pH measurement to meet the demanding requirements of most industrial applications. With its high adaptability and durability, it effectively supports process control, quality assurance, and environmental compliance across a wide range of industrial scenarios.


    Model No.: LW102D-PH(RS485)

    Use: Water PH monitoring
    Measuring Range: 0~14.00PH
    Power Supply Mode: Battery or External DC
    LoRaWAN Mode: OTAA Class A/C
    Certificates: CE,ROHS,FCC,ISO and 11 patents certifications
    Customized support: OEM, ODM
    Warranty: 1 Year
  • ZONEWU DO Sensor
    High Precision RS485 Output Water Quality DO Dissolved Oxygen Sensor
    The ZW-DO-PR is a high-precision dissolved oxygen (DO) sensor designed for industrial water quality monitoring. Utilizing the reliable fluorescence method, it delivers accurate measurements from 0 to 20.00 mg/L (0–200% saturation at 25°C) with ±2% accuracy and automatic temperature compensation (Pt1000). Featuring RS485 (Modbus RTU) output, this submersible sensor is built with durable POM, ABS, PC alloy, and 316L stainless steel, ensuring IP68 protection for reliable operation in harsh environments. With a response time of
    Model No.:ZW-DO-PR(RS485)
    Use: Monitor dissolved oxygen
    Power Supply Mode: DC12/24V
    Measuring Accuracy : ±2%, ±0.3℃
    Certificates: CE,ROHS,FCC,ISO and 11 patents certifications
    Customized support: OEM, ODM
    Warranty: 1 Year
  • EC water quality sensor
    Industrial EC Water Transmitter RS485 4–20mA Optional
    This product is suitable for drinking water, various water supply systems and recirculating aquaculture water. It adopts RS-485 (Modbus RTU protocol) signal output, which can be easily connected with PLC, DCS, industrial control computers, general controllers, paperless recorders, touch screens and other third-party equipment. It adopts 3/4 NPT thread design for submerged installation, which is convenient for installation in pipelines, water tanks and other occasions, with IP68 protection level, and can output conductivity and TDS at the same time.


    Model No.:LW100D-EC(RS485)

    Use: Measure EC of water
    Power Supply Mode: Battery or External DC
    LoRaWAN Mode: OTAA Class A/C
    Certificates: CE,ROHS,FCC,ISO and 11 patents certifications
    Customized support: OEM, ODM
    Warranty: 1 Year
  • ZONEWU Total Hardness Sensor
    RS485/ 4-20 mA Total Hardness Sensor for Water Quality Monitoring
    ZW-TH-PR split-type online total hardness sensor uses patented PVC film Ca-Mg ion electrodes to measure water total hardness (as CaCO3) with 0~1000.0mg/L range and 0.1mg/L resolution, ±10% reading accuracy. Equipped with Pt1000 automatic temperature compensation, T90<60s, IP68 protection and 3/4NPT multi-installation mode. It supports RS485/ModbusRTU (optional 4-20mA) output, low power consumption, easy connection to PLC/DCS, and two-point calibration. The stable reference system extends electrode life, ideal for industrial water quality monitoring.
    Model No.:ZW-TH-PR(RS485)
    Use: Monitor Total hardness of water bodies
    Power Supply Mode: DC12/24V
    Measuring Accuracy : ± 10% of the reading; ±0.3℃
    Certificates: CE,ROHS,FCC,ISO and 11 patents certifications
    Customized support: OEM, ODM
    Warranty: 1 Year
  • ZONEWU Multi-Parameter Water Quality Sensor
    Professional Self-Cleaning RS485/Modbus Multi-Parameter Water Quality Sensor
    This professional self-cleaning RS485/Modbus multi-parameter water quality sensor features an integrated industrial-grade design. It supports simultaneous measurement of 8 water quality parameters (e.g., DO, COD, pH) with customizable configurations. Equipped with an automatic cleaning system, it effectively prevents microbial adhesion and cuts maintenance costs significantly. Adopting RS485 bus and Modbus/RTU protocol, it transmits data directly to collection platforms. With IP68 waterproof rating, POM+316L materials and easy submersible installation, it enables long-term accurate online monitoring for various water quality scenarios.
    Model No.:ZW-MPS(RS485)
    Use: Monitor Various Water Qualities
    Power Supply Mode: DC12V
    Certificates: CE,ROHS,FCC,ISO and 11 patents certifications
    Customized support: OEM, ODM
    Warranty: 1 Year
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