Vaisala Carbocap® Carbon Dioxide Transmitter Series Gmd20/gmw20 - Silicon-based Ndir Sensor, Excellent Long-term Stability, Versatile Duct And Wall Mount Options

Features/Benefits
a cVersatile transmitters
a cDuct and wall mount models
a cIncorporates Vaisala CARBOCAPAR Sensor - the silicon-based NDIR sensor
a cExcellent long-term stability
a cNegligible temperature dependence
a cEase of installation
The duct mounted Vaisala CARBOCAPAR Carbon Dioxide Transmitter Series GMD20 and wall mounted GMW20 are specially designed for Demand Controlled Ventilation (DCV). They are easy to install and require no maintenance. The recommended calibration interval is five years.
Vaisala CARBOCAPAR technology
The GMD/W20 Series Transmitters use the silicon-based Vaisala CARBOCAPAR Sensor. The simple structure and reference measurement capabilities make this Single-Beam, Dual- Wavelength NDIR sensor extremely stable and reliable.
The temperature and flow dependences of the sensor are negligible. In addition, the measurement accuracy is not affected by dust, water vapor and most chemicals.

Versatile transmitters
The GMD/W20 series transmitters can be used independently, or incorporated into building energy management systems. The series consists of duct mount units GMD20/D and wall mount units GMW21/D and GMW22/D. Version D has a display. The two sizes in the wall-mount series make them easy to install for most standard junction boxes.