2-wire Contacting Conductivity Transmitter

The C600 is a microprocessor controlled, loop powered isolated conductivity transmitter with all power being supplied from the two wire current loop connection. Isolation enables the contacting probe to be at a potential relative to ground without affecting the integrity of the conductivity measurement. The two wire connection eliminates the requirement of a separate supply in addition to the loop supply voltage.


  • Temperature-compensated conductivity measurement

  • Two-wire field mounted transmitter – suitable for multiple-loop installations with a central controller 

  • Local display of conductivity and temperature – suitable for use as a stand-alone conductivity monitor

  • Isolated 4-20mA signal. Simple pushbutton operation

  • Tough IP65 die-cast Aluminium enclosure

  • Plug and socket connectors for easy installation and maintenance 

  • Tool-free operation – no dip-switches or potentiometers. (Suitable for masthead mounting, as pictured, or wall mounting) 

The C600 two-wire field mounted transmitters, with the appropriate sensors, are designed to continuously measure the conductivity in industrial processes. The C600 transmitters include all the circuitry necessary for the measurement and transmission of an isolated 4-20mA linear signal. All the transmitter’s functions are accessible through the pushbutton interface – there are no potentiometers or dip-switches. Calibration of the signal is accomplished using the standard calibration routine. The C600 can also temperature compensate conductivity readings using a 100 ohm TC element.

Tecnical Specifications:

Conductivity Resolution

Range 1 (0 to 19.99µS) 0.01µS/cm

Range 2 (0 to 199.9µS) 0.1µS/cm

Range 3 (0 to 1999µS) 1µS/cm

Range 4 (0 to 10.00mS) 0.01mS/cm

Range 5 (0 to 19.99mS) 0.01mS/cm

Range 6 (0 to 199.9mS) 0.1mS/cm


Range 0 - 100°C

Resolution 0.1°C

Accuracy ±0.5°C

Temperature Compensation Auto (Pt100) / Manual (0° to 100°)

Temperature Coefficient 0 to 10%

Normalisation Temperature Setting 25.0°C or 20.0°C


Number of Calibration Points 1

Output 4.0 - 20.0mA

Under-range Current Output 3.8mA/4mA (selectable)

Over-range Current Output 3.8mA/20mA (selectable)

Hold Current Output 22mA/Last Value (selectable)

Display Custom LCD

Averaging/Stability (READY indicator) Yes

Power Requirements 12V to 24V dc

Load Resistance 600 ohm Max

Ordering Information:

500/0025 - C600 in Sighted Aluminium Box

500/0024 - C600 in Blind Aluminium Box

For use with:

500/9012 - k=0.1 contacting probe on a 400mm wand

500/9150 - 

500/9187 - 


500/0023 SENSOLUTION C600 2-Wire Conductivity Transmitter 

Pipe mount brackets

m12 connector

Part of the SDI group

Astles Control Systems Ltd

B3 Regent Park, Summerlys Road,

Princes Risborough, Bucks, HP27 9LE

t: 01844 273301


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