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These CO2 transmitters use the new silicon based CARBOCAP® sensor.
The simple structure and reference measurement capabilities make
this Single-Beam Dual-Wavelength NDIR sensor extremely stable and
reliable. The measurement accuracy of the sensor is not affected
by dust, water vapor or most chemicals. |
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The new Vaisala GMD/W20 transmitters are easy to install and require
almost no maintenance (the recommended calibration interval is five
years). They are specially designed for Demand Controlled Ventilation
and related applications. The use of the GMD/W20 transmitters results
in considerable savings in installation, operation, maintenance and
recalibration costs as well as ensures the best possible control of
air quality. The GMW20 series transmitters can be used independently or they can be incorporated into building energy management systems. The wall mount GMW series transmitters are available in two sizes (GMW21 and GMW22). The GMD20 is a duct mountable transmitter. Optional LonMark® approved interface modules are available for digital communication between the transmitters and a LonWorks network. An analog temperature option is available for the GMW21. The GMA20T offers active temperature measurement using a semiconductor sensor IC. The measurement module has a voltage output of 0...10 V, corresponding to a measurement range of 0...50 ºC. The accuracy of the module is 0.5 ºC. For more information, see our section on carbon
dioxide measurement. |
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