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GE SafeAir Carbon Monoxide Detector
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GE SafeAir Carbon Monoxide Detector

GE Security Part Number: 250-CO
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Product Description

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The GE SafeAirTM 250-CO carbon monoxide (CO) detector is an accurate and reliable means of alerting building occupants of potentially dangerous levels of CO in the protected area. The internal electrochemical sensor communicates with a sophisticated on-board microprocessor that accurately tracks CO levels over time.

This commercial-grade detection technology results in quick response, reliable sensing, fast reset time, and superior false alarm immunity. Its small size allows the 250-CO to blend inconspicuously with any decor, and its smooth contoured design is compatible with both residential and commercial environments.

Unaffected by normal indoor temperature variations, the GE 250-CO actually self-adjusts for environmental changes and operates reliably under a wide variety of conditions. It also monitors its own performance and automatically compensates for sensitivity drift throughout the course of its service life.

Like all CO detectors, the 250-CO has a limited service life. When it reaches this point, the 250-COs six-year end-of-life timer automatically triggers a warning, locally, at the control panel, and optionally, at a central monitoring station, indicating that the device should be serviced.

An integrated temporal four-horn provides local signaling capability for the 250-CO, and it easily interfaces with any Listed intrusion or fire alarm system by means of its 150mA output relay, which may be connected to the auxiliary input on the control panel. Its low current draw results in little additional demand on the system power supply.

The 250-CO fully complies with the latest UL 2075 requirements which allows for installation in a wide range of residential and commercial settings.


  • Uses highly reliable, commercial-grade, electro-chemical sensing technology
  • Self-diagnostics keep the device operating optimally throughout its service life
  • Sensor is unaffected by fluctuations in normal indoor temperature
  • Built-in trouble/power supervision relay
  • 12 or 24VDC operation and 150mA relay contact configurable for normally open or normally closed operation
  • Long-life six-year sensor
  • Transmits sensor end-of-life to the control panel and central station if the system is monitored
  • Fully listed to the latest UL 2075 CO standard for residential or commercial occupancies
  • Large terminals ease wiring installation 14 to 22 AWG
  • One-touch TEST/HUSH button simplifies local operation
  • Integrated 85 dBa temporal 4-sounder for local notification
  • On-board LED provides local alarm and trouble indication
  • Inconspicuous footprint and attractively contoured design
  • Adapter plate makes replacing GE 240-COe CO detector simple


Input voltage 12 or 24 VDC supplied by control panel or resettable auxiliary power supply
Normal current consumption 20 mA
Alarm current consumption 40 mA (75 mA in test)
Alarm relay current consumption 150mA at 12 or 24 VDC
Alarm relay type Form C
Alarm relay UL rating Zone
Common trouble relay current consumption 150mA at 12 or 24 VDC
Common trouble relay type Normally opened held closed with power applied
Common trouble relay UL rating Common
CO alarm level 70 ppm/60 to 240 minutes
Sounder 85 dB
Compatible control panel Listed to UL 985 or 864 standard
Compatible electrical box North American 2 in. (64 mm) deep 1-gang
Wire size 14 to 22 AWG (0.25 to 2.0 mm)
Detector dimensions (W x L x D) 3.1 x 4.6 x 1.3 in. (7.8 x 11.7 x 3.2 cm)
Adapter plate dimensions (W x L x D) 4.5 x 6.5 x 0.2 in. (11.4 x 16.5 x 0.5 cm)
Detector weight 4.7 oz. (133 g)
Adapter plate weight 1.6 oz (46 g)
Color White
Operating temperature 32 to 104F (0 to 40C)
Relative humidity 0 to 90%, noncondensing
Altitude Less than 6,000 ft. above sea level
UL rating Regulated 12 or 24 VDC
North American standards UL 2075, UL 2034

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