Series CMT200 Carbon Monoxide Transmitter

Current/Voltage Selectable Output, 200 PPM Range

The Series CMT200 Carbon Monoxide Transmitter provides a field selectable current or voltage output that is proportional to the gas concentration in underground parking garages, vehicle maintenance facilities, or mechanical rooms. A field replaceable, electrochemical sensor provides accurate readings for up to 4 years with proper calibration. Field calibration can be done by using Model GCK-200CO-2000CO2 calibration gas, Model A-507A calibration adapter, and the on board span and zero potentiometers.

Product Applications

  • Garage ventilation
  • Mechanical room monitoring

Models & Ordering

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Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

COVID-19 Update: Due to high customer demand, lead time on some products may be up to two weeks. While this is a developing health situation, we are working continuously to take the necessary measures to ensure that the products you need are available with minimal interruption.

Model Description Usually Ships* Price Order
Ships: Same Day
Price: $131.00
Carbon Monoxide Transmitter, 0 to 200 PPM CO, 4 to 20 mA/2 to 10 VDC outputs. Same Day* $131.00 Order
Ships: Same Day
Price: $136.00
Carbon Monoxide Transmitter, 0 to 200 PPM CO, 4 to 20 mA/2 to 10 VDC outputs, rectangular enclosure Same Day* $136.00 Order


Field replaceable electrochemical, 4 year typical lifespan.
0 to 200 ppm.
Coverage Area:
5000 to 7000 sq. ft. typical.
±2% FS at the time of calibration.
Output Drift:
<5% per year in air.
Temperature Limits:
-4 to 122°F (-20 to 50°C).
Storage Temperature:
For best sensor life, 32 to 68°F (0 to 20°C).
Humidity Limits:
15 to 90% RH constant; 0 to 99% RH intermittent.
Response Time:
<45 s. to 90% of final value.
15 turn span and zero adjustment potentiometers.
UV resistant polycarbonate.
Jumper selectable 4 to 20 mA (loop powered) or 2 to 10 V (load must be >50 kΩ).
Power Requirements:
Current Output: 18 to 28 VDC;
Voltage Output: 18 to 28 VDC/VAC, reverse polarity protected.
Electrical Connection:
Removable terminal block, includes two PG11 and one PG 16 knockouts for conduit fitting.
0.28 lb (0.11 kg).
Agency Approvals:


  • Field selectable current or voltage outputs
  • Replaceable sensor
  • Field calibration kits


Model Number Description Usually Ships* Price Order
Gas Calibration Kit <br><b>(GROUND SHIPMENTS ONLY)</b> GCK-200CO-2000CO2 Gas Calibration Kit
Same Day $389.00 Order
Replacement Carbon Monoxide Sensor for the GSTA & GSTC Series, Model CMT200 A-505 Replacement Carbon Monoxide Sensor for the GSTA & GSTC Series, Model CMT200 2-3 Weeks $53.50 Order
Calibration adaptor. A-507A Calibration adaptor. Less Than 1 Week $37.00 Order
Security enclosure. A-GSTA-SE Security enclosure. Same Day $15.50 Order


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