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Home>Fire & Life Safety>Devices>Gas Detectors>Discontinued
http://www.tclifesafety.com/assets/images/productimages/macurco_cm21a.jpg
Macurco/3M CM-21A, 12/24V AC/DC CO Detector and Controller
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The CM-21A is a carbon monoxide detector and controller with dual relays.

Macurco/3M CM-21A, 12/24V AC/DC CO Detector and Controller

Item Id:MA-CM21A
Manufacturer: Macurco
Mfg Part#: CM-21A
Availability: 
Discontinued - Replaced by MA-CM6
Retail Price: $387.53
Your Price: Discontinued
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On November 15, 2011, 3M discontinued model CM-21A. The direct replacement is model CM-6. Click here to view the CM-6 product page

Features

  • CM-21A provides CO detection and automatic exhaust fan control for automotive maintenance facilities, enclosed parking garages, warehouses with forklifts, etc.
  • Selectable fan and alarm relay activation
  • 5 amp SPDT fan relay controls starters of exhaust fans
  • 1/2 amp N.O. or N.C. 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) CMS-FCK calibration kit is available. One screw allows access for calibration.

Description

The CM-21A is a low voltage, dual relay Carbon Monoxide (CO) detector and Automatic ventilation controller. The CM-21A uses a microcomputer controlled, electronic system to measure the concentration of CO and calculates when the relays should be actuated. The CM-21A is low maintenance with no periodic calibration needed and a long life (7 to 10 years) solid-state sensor.

Specifications

Power 3W from 12-24 VAC or VDC
Current 12V - 0.25 A, 24 V - 0.12 A
Size 4 1/2" x 4" x 2 18"
Connections 7 each #20 wires, 6 inches long
Mounting Box (not included) 4 x 4 electric
Fan Relay 5A, 240 VAC, pilot duty, SPDT
Fan relay actuation Selectable at 25ppm, 35ppm (default), 50ppm or 100ppm CO within 5 minutes
Alarm Relay 0.5A 200 V, 10 VA
Alarm relay actuation Selectable at 100ppm CO within 3 hours or 200ppm CO within 10 minutes
Operating Environment 0-125°F, 10 to 90% RH

Accessories designed for use with this product - To add any of these accessories to your order, simply fill in the quantity you want and click the large "Add to Cart" button above

Product Name/Description Price Quantity
Macurco CMS-FCK, CO Field Calibration Kit for Single Point Calibration Macurco CMS-FCK, CO Field Calibration Kit for Single Point Calibration $386.56   
The CMS-FCK Macurco carbon monoxide field calibration kit is used to test or calibrate Macurco Fixed Gas Detectors requiring single point calibration (CM-4, CM-2B, CM-21A, CM-1B and SS102HC)
Macurco CANN50PPM, CO Calibration Gas, 17L, 50 ppm CO/Air Macurco CANN50PPM, CO Calibration Gas, 17L, 50 ppm CO/Air $70.28   
17 liter, 50PPM CO replacement calibration gas cylinder used to field test the Macurco carbon monoxide fixed gas detectors.
Macurco CANN200PPM, CO Calibration Gas, 17L, 200 ppm CO/Air Macurco CANN200PPM, CO Calibration Gas, 17L, 200 ppm CO/Air $70.28   
17 liter, 200PPM CO replacement calibration gas cylinder used to field test the Macurco carbon monoxide fixed gas detectors.
Macurco CANN300PPM, CO Calibration Gas, 17L, 300 ppm CO/Air Macurco CANN300PPM, CO Calibration Gas, 17L, 300 ppm CO/Air $70.28   
17 liter, 300PPM CO replacement calibration gas cylinder used to field test the Macurco carbon monoxide fixed gas detectors.
Macurco CANN400PPM, CO Calibration Gas, 17L, 400 ppm CO/Air Macurco CANN400PPM, CO Calibration Gas, 17L, 400 ppm CO/Air $70.28   
17 liter, 400PPM CO replacement calibration gas cylinder used to field test the Macurco carbon monoxide fixed gas detectors.
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