Project Description

Industrial Online Conductivity/TDS/Salinity Sensor

Smart conductivity sensor, using RS485 communication interface and standard Modbus protocol. Provides measurements applicable to low, medium, and high range electrical conductivity, the electrode constant is from 0.1 to 10 cm-1, electrode materials are graphite, platinum, stainless steel,it can Measure conductivity, TDS, salinity. Corrosion resistant shell,built – in PT1000 temperature sensor and compensation algorithm,applicable to all kinds of harsh working environment. Included with data analysis software,with calibration, recording, analysis, diagnosis and other functions. The electrode has the advantages of good accuracy, good linearity and stable electrode constant.

W520-A Four-Electrode Type Conductivity Sensor

  • Digital RS-485 output, support MODBUS

  • 0~50 ℃;IP68 rating

  • Range: 1 uS/cm to 2000 mS/cm, precision: 1%

  • No polarization effect, low maintenance

  • Automatic temperature compensation

  • Wide range and excellent interference rejection

  • PEEK sensor body and Nickel electrodes

  • Pressure: 0-5 bar

Online Conductivity Sensor Features

  • The electrode design is precise,high accuracy, linearity and wide measuring range

  • Electrode constant is very stable,not affected by polarization

  • Automatic compensation for surface contact resistance, free from contamination

  • PT1000 temperature compensation,accuracy can reach to ±0.1℃

  • Corrosion resistant shell,waterproof grade IP68,can work underwater for a long time

  • RS485 communication interface,standard Modbus protocol,easy to be integrated

  • Data analysis software,with calibration, recording, analysis, diagnosis functions.

Widely used in surface water monitoring, industrial wastewater and municipal wastewater monitoring, water treatment industry, boiler backwater monitoring, deionization process monitoring, reverse osmosis monitoring, sea water, brine, aquaculture water monitoring, etc.

Temperature: 0-60 ℃ ;pressure: 0-5 bar

Conductivity is a measure of dielectric conductivity, the unit is usually expressed in μS/cm or mS/cm,the conductivity of pure water is less than 0.05 S/cm at room temperature,the conductivity of natural water or surface water is 100-1000 S/cm, the conductivity of acid base solution is up to 1000mS/cm.
Two coaxial electrodes are placed in the sample solution, a sine wave voltage is applied between the electrodes and the current value is measured, calculate the conductivity value G or the resistance value R based on the Ohm’s law, the conductivity is determined by the electrode constant K associated with the structure.

Technical Parameters

Range 1uS/cm~2000 mS/cm
Response Time 10 sec
Housing IP Rating IP68
Accuracy 1%
Working Temperature Range 0-60℃
Interface Support RS-485, MODBUS protocols
Construction M22x1.5
Power Requirements DC 5~12V  +/-5%, current <50mA
Temperature Sensor Type NTC
Sensor OD 22mm
Sensor Length 146.5 mm
Cable Length 10m standard; 5m, 15m, and 30m optional
Calibration Support one point and two-points calibration
Body Materials POM and PEEK

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