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Wall/Duct mounted CO2 transmitter


The duct mounted Vaisala CARBOCAP Carbon Dioxide Transmitter Series GMD20 and wall mounted Vaisala CARBOCAP Carbon Dioxide Transmitter Series GMW20 are specially designed for Demand Controlled Ventilation (DCV). They are easy to install and require almost no maintenance. The recommended calibration interval is five years.

Its main attractions are:
  • Vaisala CABOCAP technology
  • Versatile transmitters
  • Improve indoor air quality with minimum energy cost
  • Temperature options

  • Technical Specs

    Model GMD20
    GMD20D
    GMW21
    GMW22
    GMW21D
    GMW22D
    GMM20W
    Measurement Range 0...2000ppm
    (Nominal; can be calibrated for other ranges;0...5000ppm, 0...10,000ppm, 0...20,000ppm)
    Sensor Semiconductor IC
    Accuracy at 25ºC(77ºF) against certified factory references <±[30ppm + 2.0% of reading]
    Power supply Nominal 24VDC/vac
    18...30VDC
    Output 0...10V
    Remarks GM121: Display and relay option for GMD/W121/22
    GMR20: erlay output option
    GML20: LonWorks module with CO2 signal (Not available when display option is added)
    GML20T: LonWorks module with both CO2 signal and temperature signals (not available when display module is added)
    19222GM: Calibration software kit (disk and serial COM adapter)
    GMA20T: Analog temperature module for GMW21 (not available when display module is added)
    GM70 w/pump option hand-held CO2 meter for field verification.

    Data sheet

    Catalogue



    See also
    Ecological CO2 transmitter
    The Vaisala CARBOCAP Carbon Dioxide Probe GMP343 is an accurate and rugged probe-type instrument for ecological measurements. Example applications include:
  • CO2 soil respiration
    .....
  • Wall/Duct mounted CO2 transmitter
    The duct mounted Vaisala CARBOCAP Carbon Dioxide Transmitter Series GMD20 and wall mounted Vaisala CARBOCAP Carbon Dioxide Transmitter Series GMW20 are specially designed for Demand Controlled Ventila.....
    CO2 transmitter
    The Vaisala CARBOCAP Carbon Dioxide Transmitter Series GMT220 is designed to measure carbon dioxide in harsh and humid environments. The housing is dust and waterproof to IP65 (NEMA 4) standard. The m.....


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