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CX105 Loop-Powered 4-20mA Conductivity Transmitter

CX105 Loop-Powered 4-20mA Conductivity Transmitter

Our CX105 conductivity transmitter is an isolated output 4-20mA industrial transmitter for reading contacting conductivity sensors. The CX105 transmitter also measures Resistivity and TDS. Easily power the unit with available two-wire power supply loop. This transmitter is ideal for connecting to a PLC for advanced control systems. The CX105 has versatile mounting options for wall or panel mount. With a dual display LCD, monitoring both the measuring value and the temperature is simple.

  • Dual display shows the measuring value and temperature

  • Compatible with a wide variety of contacting conductivity, resistivity, and TDS sensors

  • One year limited warranty

  • CE certified – compliant with European Community Standards

Product Specifications


  • LCD: 128*65 dot matrix, figure or alphabet: 12×8, 28×15, 32×18, etc.

  • Update rate: 1 second

  • Contrast: User selected, 5 levels


  • Conductivity: 0.05 to 500,000 µS/c

  • Resistivity: 1KO•cm to 18.3MO•c

  • TDS: 0.023 to 200,000 pp

  • Accuracy: ± 0.5% of readin

  • Repeatability*: ± 0.05% of span

  • Temperature Drift*: Zero and Span: ± 0.02% of span per ºC

*These performance specifications are typical at 25°C


  • Power: 19 -48VDC, regulated, 30mA maximum

Current Output:

  • Isolated 4-20 mA output with 0.004 mA (12-bit) resolution

  • Update Rate: 1 second

  • Maximum Loop Impedance: 250O@24V; 600O@31V; 1500O@48V


  • Non-volatile: All user settings are retained indefinitely without battery backup

Open-Collector Output:

  • Isolated, 40 VDC max. pull-up voltage

The OC output can be configured to be one of three modes below:

High mode, Low mode, Proportional pulses

Ambient Conditions:

  • Operation: -10 °C to 70 °C (14 °F to 158 °F); 0-95% relative humidity, non-condensing

  • Transport/storage: -15°C to 80°C(5°F to 176°F); 0-95% relative humidity, non-condensing

Standards and Approvals

  • CE: Certified Compliant to European Community Standards.

CX105 Conductivity Transmitters


About Us

Metex Corporation Limited has been providing superior products and services to the process control, chemical treatment, waste water, industrial and manufacturing industries for over 25 years. It is our goal to continually provide our customers with the best possible equipment, technology, and service.


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