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First Alert GCO1CN Combination Explosive Gas and Carbon Monoxide Alarm - 120V AC Plug-In with 9V Battery Backup and Digital Display

$ 58.99 $ 52.99
Availability: In Stock

Protection 3-in-1: CO + Natural Gas + Propane
Certification UL 1484 + UL 2034 Listed
Power 120V AC Plug-In + 9V Battery Backup
Display EZ View Backlit Digital Display
Audio Alarm 85 dB at 10 ft

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SKU: FA-GCO1CN
Combination Gas and CO Alarm
BRK
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Description

Product Description

First Alert GCO1CN - 3-in-1 Combination Carbon Monoxide and Explosive Gas Alarm for Residential and Institutional Applications

Protect against three household hazards in one alarm: carbon monoxide, propane, and natural/methane gas. The First Alert GCO1CN is UL 1484 and UL 2034 Listed and compatible with NYC Local Law 157 and 102 of 2025 (Jan 1, 2027 natural gas alarm deadline). An electrochemical CO sensor and a metal oxide gas sensor deliver early warning on an EZ View backlit digital display with peak level memory. Plugs into any 120V AC outlet with 9V battery backup during power outages. Dual compliance for NYC gas and CO in a single unit - ideal for co-ops, condos, multifamily buildings, hotels, and dormitories.

Top Features

  • 3-Way Protection in a Single Alarm: Three sensors detect carbon monoxide, propane gas, and natural/methane gas - one unit replaces separate CO and gas alarms, reducing install points and maintenance overhead.
  • Electrochemical CO Sensor: The most accurate CO sensing technology available for residential alarms, with conservative thresholds (70 PPM for 60-240 min, 150 PPM for 10-50 min, 400 PPM for 4-15 min) and no false-alarm response below 30 PPM.
  • EZ View Backlit Digital Display: Clear real-time readout of CO levels in parts per million (PPM), active hazard type (Gas or CO), and battery status - with peak level memory to recall the highest CO reading since the last reset.
  • 120V AC Plug-In with 9V Battery Backup: Continuous protection even during power outages via the included 9V alkaline battery backup; swing-up battery cover allows 9V replacement without removing the unit from the outlet.
  • Two Silence Features Plus End-of-Life Warning: Silence the low-battery chirp for up to 8 hours or silence a nuisance alarm for several minutes with one button; End-of-Life feature signals when the unit needs replacement.
Specification Value
Product Information
Model Number GCO1CN (Catalog Reference GCO1B)
Brand First Alert
Manufacturer BRK Brands, Inc. (a Jarden Corporation Company)
UPC 029054000453
Detection and Sensors
Detector Type 3-in-1 Combination: Carbon Monoxide + Explosive Gas (Propane + Natural/Methane)
CO Sensor Electrochemical
Gas Sensor Thick film metal oxide
CO Alarm Thresholds 70 PPM between 60-240 min / 150 PPM between 10-50 min / 400 PPM between 4-15 min
CO Detection Floor Will not alarm below 30 PPM (no response to constant 30 PPM for 30 days)
Audio Alarm 85 dB at 10 ft (solid state piezo horn)
Gas Alarm Pattern Continuous beeps + rapidly flashing green light
CO Alarm Pattern 4 beeps, pause, 4 beeps + rapidly flashing green light
Display EZ View backlit digital display - shows hazard type (Gas or CO), battery level, and CO levels in PPM
Peak Level Memory Yes - press Display Button to recall highest CO level recorded
Alarm Reset Automatic when explosive gas and/or CO clears
Power and Operation
Operating Voltage 120V AC, 60 Hz Plug-In
Battery Backup 9V alkaline battery (not stated as included in PDF - verify at receipt)
Battery Access Swing-up cover allows battery replacement while mounted or plugged in
AC Power Indicator Constant green light
DC Power Indicator Intermittent green light
Test / Silence Button Single button - electronically simulates both gas and CO alarm conditions
Low Battery Silence Up to 8 hours
Alarm Silence Several minutes (nuisance alarms)
End-of-Life Feature Yes
Physical and Environmental
Dimensions 3.1 in H x 5.7 in L x 2.5 in D
Weight 9.6 oz (272 g)
Operating Temperature 40 degrees F to 100 degrees F (4 degrees C to 38 degrees C)
Operating Humidity 10 to 95 percent relative humidity
Compliance and Certification
Safety Listings UL 1484 (explosive gas) and UL 2034 (carbon monoxide)
Standards Compliance NFPA 720, ICC, NFPA 101 (applicable multifamily dwelling standards)
Shipping and Packaging
Individual Carton Dimensions 5.813 in L x 2.938 in W x 3.438 in H
Individual Carton Weight 0.69 lbs
Master Pack 6 units per case
Master Carton Dimensions 9.125 in L x 7.125 in W x 6.313 in H
Master Carton Weight 4.35 lbs
Master Carton GTIN-14 60029054000455 (I2 of 5 code: 600 29054 00045 5)


First Alert is a registered trademark of the First Alert Trust. The GCO1CN is manufactured by BRK Brands, Inc. (a Jarden Corporation Company, NYSE: JAH), headquartered at 3901 Liberty Street Road, Aurora, IL 60504-8122. Installation of this alarm must conform to NFPA 720 and all applicable local building codes - always check local codes before installation and follow all placement instructions in the user manual. The GCO1CN is designed for residential and institutional applications including sleeping rooms of hospitals, hotels, motels, dormitories, and other multifamily dwellings as defined in NFPA 101. This combination alarm does not replace smoke alarms - each dwelling unit still requires a UL 217 listed smoke alarm in addition to this gas/CO alarm. The alarm contains mounting hardware and is listed for wall mounting. Battery not stated as included in the spec sheet - verify battery inclusion at receipt.

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