Vaisala GMD20 Manuals

GMD20 CO2 transmitter uses a new CARBOCAP sensor technology with superior stability and repeatability. The transmitter can be directly installed in the duct and can optionally be equipped with an electromagnetic valve output and LonWorks interface.

This document introduces the basic information of Vaisala's GMD20 CO2 sensor, including product features, models, installation methods, electrical connections, etc.

This document introduces the features and characteristics of the GMD20/D CO2 sensor, including the working principle, installation method, and electrical connection.

The GMD20 is a new CO2 sensor from Vaisala. It uses a CARBOCAP silicon-based microsystem sensor, which guarantees excellent stability and reliability. The sensor requires almost no maintenance, and the recommended calibration interval is five years. The sensor can be equipped with a relay output or a LonWorks interface as an additional option. These features make the GMD20 a very attractive choice for various ventilation and air conditioning applications.