Carbon Dioxide Transmitters for Demanding Industrial Applications



  • Incorporates Vaisala CARBOCAP® - the silicon based NDIR sensor
  • IP65 protected against dust and spray water
  • Several measurement ranges
  • Easy installation
  • Standard analog outputs and two configurable relays available

Applications include:

  • Horticulture and fruit storage
  • Greenhouses and mushroom farming
  • Safety alarming and leakage monitoring
  • Demand controlled ventilation in harsh environments

The Vaisala CARBOCAP® Carbon Dioxide Transmitter Series GMT220 is designed to measure carbon dioxide in harsh and humid environments. The housing is dust- and waterproof to IP65 standards.

The GMT220 series transmitters incorporate the advanced Vaisala CARBOCAP® Sensor. The patented sensor has unique reference measurement capabilities. Its critical parts are made of silicon; this gives the sensor outstanding stability over both time and temperature. By lengthening the calibration intervals, the user saves both time and money.

Interchangeable Probes

The user has a choice of measurement ranges up to 20% of CO2. The GMT221 is for higher concentrations of CO2 and the GMT222 for lower concentrations of CO2. The GMT220 probes are interchangeable. They can be removed and reattached or replaced at any time – without the need for calibration and adjustment. The probes can be attached directly to the transmitter body or, when used with a cable, installed remotely into hard-to-reach places or areas with dangerously high levels of CO2.

The interchangeability of the GMT220 transmitter’s probes truly facilitates field maintenance. The end user can carry out field maintenance without any additional equipment or heavy and expensive calibration gas bottles by simply replacing a probe. Probes that have been replaced can be sent to Vaisala for recalibration.


Types Of Carbon Dioxide Products - Fixed Installations

  • GM20

  • GMP343

  • GMT220

  • GMW115

  • GMW116

  • GMW90

  • GMW80