Vaisala GMW80 Series CO2, Humidity & Temperature Transmitter


  • Cost-efficient, affordable
  • Reliable and maintenance-free operation for up to 15 years
  • Superior stability due to 2nd generation proprietary CARBOCAP technology
  • Improved accuracy due to low self-heating of microglow light source
  • Easy to install, easy to use
  • The internal reference in the CO2 sensor guarantees the best stability and operation even in buildings occupied 24/7
  • Ideal for demand-controlled ventilation

Dpstar is a leading supplier of environmental measurement sensors for temperature, relative humidity, pressure, dew point, CO2, and other environmental condition monitoring for industrial process application and research. Since the ’90s, we earned a reputation as a trusted partner to our clients through our commitment and dedication. We are an authorized distributor and supplier of measuring sensors solutions from renowned manufacturers Vaisala. Vaisala is a global leader in environmental and industrial measurement. Building on 80 years of experience, Vaisala provides observations for a better world. Vaisala is a reliable partner for customers around the world, offering a comprehensive range of innovative observation and measurement products and services.

Measuring CO2 is the most economical way to monitor both indoor air quality (IAQ) and human presence with one sensor. Inadequate ventilation results in elevated CO2 levels, causing drowsiness and decreased productivity. Good indoor air quality can be achieved based on occupancy levels. Energy is saved by minimizing the use of unconditioned outside air. A 5-year warranty is valid for instruments purchased in 2021 and beyond. For accurate and stable HVAC measurements, the wall-mounted Vaisala CARBOCAP Carbon Dioxide and Temperature Transmitter Series GMW80 provide the best stability and reliability on the market, up to 15 years. These indoor air quality sensors are designed for standard, demand-controlled ventilation applications. The GMW80 is ideal for buildings occupied 24/7. The CO2 measurement of the GMW80 series is based on a second-generation CARBOCAP sensor, which uses a novel, microglow light source instead of an incandescent light bulb for a longer trouble-free lifetime. The internal reference in the CO2 sensor guarantees the best stability and operation also in constantly occupied buildings without frequent readjustments. The CARBOCAP sensors give correct CO2 measurements immediately when powered on as they have a built-in reference measurement. Proper operation can be verified immediately after snapping on the device cover.

The following product models are available:

  • GMW83RP
  • GMW83DRP
  • GMW83
  • GMW83A
  • GMW83D
  • GMW84
  • GMW84S
  • GMW87
  • GMW88


Key Benefits


Choose from eight transmitter options to measure CO2, temperature, and/or humidity, with or without a display or LED indicator or current outputs.


The GMW80 series transmitters include a number of subtle design features allowing for quick and easy installation and commissioning, which saves installation time and money. They are ready for use immediately – the transmitters will show correct CO2 readings right after installation without any adjustment period.

Easy installation

With modern buildings often having hundreds of sensors, installation time per unit can be a significant cost factor. Returning to the building site to check sensor operation adds further costs. The GMW80 series transmitters include a number of subtle design features that have been introduced to make installation and commissioning quick and easy. The pull-out tab makes opening the transmitter faster than before, while also doubling as a quality check slip and holder for the anti-tamper screw. The backplate can be twisted onto premounted screws, and the wiring can be done easily on the clearly marked backplate. The electronics can be snapped on later when the building automation system is commissioned. For measurements in more demanding conditions (for example, dusty or humid installation locations), the GMW87 and GMW88 models provide an IP64-rated enclosure with a cable gland.

Reliable operation

The GMW80 series transmitters are optimized for low maintenance. The unique, low-power CARBOCAP technology enables a longer lifetime and better stability than ever before. As the power consumption is low, the heat generated by the electronics does not distort the temperature inside the sensor. The internal reference in the CO2 sensor guarantees superior stability and flawless operation even in constantly occupied buildings, without the need for frequent readjustments. The reliable operation and accurate measurement values of the GMW80 series transmitters contribute to the significant cost savings brought by demand-controlled ventilation.


Vaisala GMW80 Series CO2 Humidity & Temperature Transmitter_DpstarGroup


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