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Latest added news blog
MSR175 Shock Transportation Data Logger
Kenny Laidlaw
Oct 01,2018
The MSR175 shock transportation data logger is the newest miniature logger from MSR.  The MSR175 more >
GS-CO2 Carbon Dioxide, RH & Temperature Sensors

GS-CO2 Carbon Dioxide, RH & Temperature Sensors

Quick Overview

The GS-CO2 is a non-dispersive infrared sensor for measuring CO2 concentrations in controlled spaces. The sensor utilises microprocessor based electronics and a unique self calibration algorithm to improve long term stability and accuracy. It is ideal to ensure adequate ventilation while maximizing energy savings by ventilating at the optimum level. Units are also available with integrated temperature and relative humidity sensors to provide additional parameters. These units are ideal for monitoring CO2 levels, temperature and RH in commercial buildings, industrial plants, laboratories and public spaces. Units can provide either a 4-20mA or 0-10V output but options for RS485 Modbus communications, LED indicators, LCD display and override button relay output are available on some units.



  • Available for wall and duct mount applications
  • Real time measurement of Carbon Dioxide levels
  • Accurate and reliable measurement using NDIR infrared technology
  • Temperature & Humidity option available
  • Option for 3 colour ‘traffic light’ status indication LED indicators or LCD display
  • RS485 Modbus connectivity available
  • Override button with relay output option available.


Power Supply: 24vDC (max 67mA)
Output: 4-20mA, 0-10vDC (jumper selectable)
RS485 Modbus (Optional)
Housing: Flame retardant ABS
Protection: Duct Type : IP54
Wall Type: IP30
Ambient Range: 0 to 50°C, 95% non-condensing

LED Indicator Guide (optional feature)

  1st Green LED <600ppm
  1st & 2nd Green LED 600 to 800ppm
  1st Yellow LED 800 to 1,200ppm
  1st & 2nd Yellow LED 1,200 to 1,400ppm
  1st Red LED 1,400 to 1,600ppm
  1st & 2nd Red LED >1,600ppm

LCD Display Guide (RHT units only)

Availability: Stock Item