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KWS-300B Online Digital Conductivity Sensor – Standard Version

Introduction

Kacise presents a new-generation four-electrode conductivity sensor developed with advanced international four-electrode technology. It features an RS485 digital interface, supports the MODBUS protocol, and adopts an environmentally friendly design. Compared with conventional two-electrode conductivity sensors, it offers higher measurement accuracy, a wider measuring range, and superior long-term stability.

The four-electrode conductivity sensor provides clear technical advantages. It effectively eliminates polarization effects during high-conductivity measurements and significantly reduces measurement errors caused by electrode contamination, ensuring reliable and accurate readings over extended operation.

Features

  • Simultaneous output of conductivity, salinity, TDS, and temperature parameters
  • Corrosion-resistant housing with IP68 waterproof rating for long-term underwater operation
  • Built-in temperature sensor with automatic temperature compensation

Dimensions

(1)KWS-300A Dimension

KWS-300A Digital Conductivity Sensor dimension

(2)KWS-300B Dimension

KWS-300A Digital Conductivity Sensor dimension

Wiring

Red——power supply (VCC)

White——485 data _B (485_B)

Green——485 data _A (485_A)

Black——GND

ModelKWS-300AKWS-300B
Conductivity Range0-200mS/cm (0-2mS/cm, 2-20mS/cm, 20-200mS/cm)
Accuracy±1% or 0.01mS/cm (which is bigger)
Salinity Range0-175ppt
Accuracy±1ppt
TDS Range0-128000mg/L
Response Time<10s
Ip GradeIP68
Max. Pressure6 bar
Sheath MaterialTitanium
Operating Temperature0~50℃(no freezing)
OutputRS485, Modbus
Power Consumption0.2W (Recommended power supply: DC 9–24V, >500mA)
Sensor Dimensionφ22mm*175.5mmφ22mm*165.8mm
AssemblyNPT3/4 male threadConnect with multi-parameter host
Cable Length10 meters (default), customizableNone
Calibrationsupport one point or two-points calibration
Casing MaterialTitanium+PEEK
KWS-300 Digital Conductivity Sensor Calibration Tutorial | 4-Electrode RS485 MODBUS

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