Our best selling 4-wire conductivity, salinity and temperature on-line transmitter/controller.

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Conductivity/salinity analyzer, 1/4 DIN panel mount single parameter analyzer with an IP65 case, and 4-wire cells. Has programmable reference temperature and coefficients. The 4 to 20 mA output is fully programmable, reversible and isolated. There are 2 programmable relays for conductivity/salinity and one relay for temperature and an RS-485 (modbus) interface. Password & ID protected. Graphical display. 115/230 V AC.

  • RS-485 (modbus) output
  • Programmable relays for conductivity/salinity
  • Reversible and isolated 4 to 20 mA output
  • Programmable relay for temperature
  • Conductivity/salinity/temp. measurement & control
  • Simultaneous analysis and display for measurement and controls
  • User programmable reference temperature temperature coefficient
  • 4-wire cells for long cable length & wide measurement range


Conductivity Range
0 uS/cm to 200.0 mS/cm
Conductivity Resolution
1 μS/cm, 0.01 mS/cm, 0.1 mS/cm
Conductivity Accuracy
±0.5% F.S. ± 1 digit
Salinity Range
0.0 to 70.0 ppt
Salinity Resolution
0.1 ppt
Salinity Accuracy
±0.5% F.S. ± 1 digit
Temperature Range
-10.0 to 120°C
Temperature Resolution
0.1 °C
Temperature Accuracy
±0.3 °C
Reference Temperature
10 °C to 29 °C
Temperature Coefficient
0.00 % to 4.99%
Basic Cell Constant
Cell Constant Range
±30% of basic cell constant
Output Relays Numbers
Two programmable high or low relays for conductivity, One programmable high or low relays for Temp.
Control Type
Relay Output
5 amps at 115 VAC, 2.5 amps at 230 VAC
Relay Set Point Hysteresis
User programmable
Current Output
Isolated 4 to 20 mA
Isolated Voltage
500 V DC
Maximum Load
500 ohm
ATC Sensor
Thermistor 10k ohms at 25 °C
Security Protection
4digit password
Audio feedback
Digital output
RS485 (modbus)
Graphic LCD w/backlight
115 V AC or 230 V AC 50/60 Hz
1/4 DIN, depth 148 mm
950 g

Documentation and Supports