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First Alert GCO1 Combination Carbon Monoxide and Explosive Gas Alarm
$50.45
Final price set by Amazon · may vary
EDITORIAL REVIEW — First Alert GCO1 Combination Carbon Monoxide and Explosive Gas Alarm Assessed on the standards the product is actually certified to and on how the format fits a working shift, by Steven Eaton, WC S...
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Built for Industrial BuyersResearch written for safety managers, procurement teams, and field supervisors.
EDITORIAL REVIEW — First Alert GCO1 Combination Carbon Monoxide and Explosive Gas Alarm
Assessed on the standards the product is actually certified to and on how the format fits a working shift, by Steven Eaton, WC Safety editor.
The First Alert GCO1 Combination Carbon Monoxide and Explosive Gas Alarm provides dual protection against two invisible household dangers: carbon monoxide poisoning and combustible gas leaks. This plug-in detector continuously monitors for CO as well as propane, natural gas, and methane, sounding an 85dB alarm before dangerous levels build up.
- Detects both carbon monoxide AND combustible gases (propane, natural gas, methane)
- Plug-in with 9-volt battery backup ensures protection during power outages
- Backlit digital display shows current CO levels at a glance
- Loud 85dB alarm horn alerts the whole household
- 5-year limited warranty
- Dimensions: 5.6" x 3.1" x 1.8"
Meets UL 2075 standard for gas and carbon monoxide alarms. Ideal for homes with gas appliances, fireplaces, or attached garages.
first alert gco1 combination carbon monoxide and explosive — what the listing actually specifies
What to check before you buy
A portable extinguisher is for an incipient fire only. OSHA 29 CFR 1910.157 and NFPA 10 both scope portable units to a fire still small enough to be approached safely with an escape route at your back. If it has spread beyond that, the correct action is to evacuate and call the fire service.
- UL 2034 listing
- Residential CO alarms in the US are listed to UL 2034. Industrial CO monitoring is a different class of instrument with different alarm thresholds.
- Alarms expire
- CO sensors have a finite life - commonly 7 to 10 years from manufacture. Many units now sound an end-of-life chirp and cannot be reset.
- Placement
- CO mixes with air rather than layering at the ceiling like smoke, so alarms go on every level and outside sleeping areas. Keep them away from fuel-burning appliances and vents to reduce nuisance alarms.
- Digital display
- A display showing parts per million lets you distinguish a low-level chronic leak from a spike, which matters when talking to responders.
How it compares to other carbon monoxide alarms we review
| Product |
|---|
| First Alert GCO1 Combination Carbon Monoxide and Explosive Gas Alarm (this page) |
| Kidde COB Battery-Powered Carbon Monoxide Alarm |
| Kidde COP Plug-In Carbon Monoxide Alarm with Battery Backup |
| Kidde COBD Carbon Monoxide Alarm, Portable AA with Digital Display |
| Kidde COPD plug-in carbon monoxide alarm |
| Kidde COB10 Carbon Monoxide Alarm, 10-Year Battery, LED Alarm-Only |
| Kidde COBD10 Carbon Monoxide Alarm, 10-Year Battery with Digital Display |
List prices recorded when this page was last updated; Amazon pricing moves frequently, so check the live listing. Browse the full carbon monoxide alarms range.
More from our Carbon Monoxide Alarm reviews
- Kidde COBDL10 10-Year Battery CO Alarm with Low-Level Alerts
- Kidde Nighthawk KN-COB-DP-LS Plug-In Carbon Monoxide Alarm with Digital Display
What separates the models in this category is set out in 10 year sealed vs replaceable battery smoke alarms, best battery smoke detector 2026, best carbon monoxide detector 2026, best economical smoke detector 2026, best fire extinguisher for home.
Directly comparable options are grouped in abc dry chemical extinguishers, carbon monoxide gas monitors, combo smoke co alarms.
Written by Steven Eaton, WC Safety editor. WC Safety is an independent PPE review site, holds no inventory and sells nothing directly; Amazon links are affiliate links that earn a commission at no cost to you and never affect the assessment. This page is not medical, legal or regulatory advice.
Related standards and selection guidance: best fire extinguishers 2026, best first alert smoke detector 2026, best hardwired smoke detector 2026, best kidde smoke detector 2026.
The rest of the range sits in extinguisher cabinets, fire escape hoods.
Brand / Vendor
First Alert
Model / SKU
GCO1CN
Product Type
Carbon Monoxide Alarm
Price
$50.45 (Amazon)
Availability
Check current availability on Amazon
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Coverage focuses on equipment built for professional use in manufacturing, construction, and industrial environments.
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Product information is compiled from manufacturer specifications, published standards information, compatibility data, and other cited sources.
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