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  Macurco CM-21A CO detector and fan controller

Macurco CM-21A CO detector and fan controller


Our Price : $334.88

UPC Code: 783748814206

Product Code: MACCM21A

Discontinued Use CM6


Macurco CM-21A CO detector and fan controller

CM-21A CO detector and fan controller, individual or use with control systems. Mounts in 4x4 box, meets OSHA standards, fan and alarm relays, 12-24 VAC or VDC operation.

CM21A Carbon Monoxide Detector and Controller

  • Low maintenance, no periodic calibration needed
  • SPDT fan relay switches 5 amps
  • Automatic ventilation controller
  • Dual relays: fan (SPDT) & alarm (N.O.)
  • Lights reflect system status
  • Micro computer controlled
  • Long life (7 to 10 years) Solid state sensor
    CM-21A is very specific to carbon monoxide (CO), avoids nuisance alarms.
    CM-21A provides CO detection and automatic exhaust fan control for automotive maintenance facilities, enclosed parking garages, warehouses with forklifts, etc.
    CM-21A meets the requirements of the Uniform Building Code for enclosed garages.
    CM-21A Meets or exceeds UL 2034 standard and OSHA standards for CO exposure.
    Fan relay activates at 35 ppm of CO averaged over 5 minutes. 25 ppm is selectable.
    Alarm relay activates at 100 ppm of CO after 30 minutes or 200 ppm after 10 minutes.
    5 amp SPDT fan relay controls starters of exhaust fans.
    1/2 amp N.O. alarm relay connects to warning devices or control panels.
    CM-21A mounts on a standard 4x4 electrical box and becomes cover for the box.
    Supervised system: any internal detector problem will cause the fan relay to activate.
    Optional calibration kit is available. One screw allows access for calibration.

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