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Carbon Dioxide, Temperature, and Humidity Transmitters

The wall-mounted Vaisala GMW90 Series CARBOCAP® Carbon Dioxide, Temperature and Humidity Transmitters are intended for demand controlled ventilation applications. They measure carbon dioxide and temperature and have an option for an additional humidity measurement.

Vaisala GMW90 in brief:

-A flexible CO2 transmitter family with a variety of options and features

-Both analog and digital output models available

-Comes with a calibration certificate

-Easy installation due to well-designed features such as snap-on electronics, dip switches, and display

-Convenient calibration: Choose either a field exchangeable measurement module or calibrate using a hand-held meter or a reference gas bottle.

Vaisala GMW90 family includes the following models:

-GMW93(D) CO2+T, voltage output (with display)
-GMW93R(D) CO2+T+RH, voltage output (with display)
-GMW93RA CO2+T+RH , voltage output with CO2 indicator LED and display
-GMW94(D) CO2+T, current output (with display)
-GMW94R(D) CO2+T+RH, current output (with display)
-GMW95(D) CO2+T, digital model (with display)
-GMW95R(D) CO2+T+RH, digital model (with display)

Technical Specs

Model Carbon Dioxide, Temperature, and Humidity Transmitters
Fixed / Portable Fixed
Measurement Range Carbon dioxide: 0 … 5000 ppm; Temperature: -5 ... +55 °C (+23 ... +131 °F); Humidity: 0 ... 95 %RH
Output Screw terminals, max. wire size 2 mm2
Remarks Measured parameters: carbon dioxide, temperature, and humidity (optional)

▪ Superior long-term stability with the next generation Vaisala CARBOCAP® sensor

▪ Accurate temperature and humidity measurements in a three-parameter instrument due to the low-power microglow infrared source

▪ Quick and easy installation and maintenance

▪ Calibrated, user-exchangeable modules for carbon dioxide, temperature and humidity

▪ 3-point traceable CO2 calibration (certification included)

▪ Both analog and digital commu-nication (BACnet/Modbus)

Data sheet


See also
Humidity and Temperature Transmitters for Building Automation Applications
​Vaisala INTERCAP® Humidity and Temperature Transmitter Series HMDW80 measure relative humidity and temperature in various building automation applications. Transmitters combine easy installatio.....
Humidity transmitter - Advanced
Vaisala HMT330 series are easy-to-use transmitters for demanding industrial and air conditioning applications. The transmitters measure relative humidity and temperature and from these calculate dew p.....
Humidity and Temperature Transmitters For Harsh Outdoor Measurements In Building Automation Applications
Vaisala HUMICAP® Humidity and Temperature Transmitter Series HMS110 are designed for demanding outdoor measurements in building automation applications. These ±2% transmitters include an integrated ra.....


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