Carbon Monoxide Detectors

Kidde Carbon Monoxide Detector KN-COB-LP2

First Alert CO605 Plug-In Carbon Monoxide Detector

The middle-tier First Alert plug-in: real outage protection from the battery backup, at a lower cost than the display-and-gas combo unit.

Kidde KN-COPP-B-LPM Battery Carbon Monoxide Detector

A portable, battery-only Kidde detector with LED status indicators and peak-level memory, suited to placement flexibility over a digital readout.

First Alert CO600 Plug-In Carbon Monoxide Alarm

A no-frills plug-in CO alarm that does the core job at a lower price than First Alert's display and battery-backup models.

Kidde KN-COB-LP2 Portable Carbon Monoxide Detector

A dependable, easy-to-move CO alarm backed by consistently positive reviews on reliability and battery life, though it signals with LEDs and an alarm rather than a digital reading.

First Alert CO400 Battery Carbon Monoxide Alarm

A straightforward 2-pack battery alarm for multi-room coverage, without the display or peak-level memory that First Alert's CO615 and CO710 add.

Kidde Hardwired Smoke and Carbon Monoxide Detector

A solid pick for extending an existing hardwired Kidde interconnect system, less useful as a first, standalone alarm in an unwired home.

First Alert CO615 Plug-In Carbon Monoxide Alarm with Display

A dual-power CO alarm that adds a digital display and peak-level memory to the standard plug-in format, with a detachable cord for placement flexibility.

Kidde KN-COB-DP2 Plug-In Carbon Monoxide Detector

A plug-in Kidde CO detector with battery backup and Peak Level Memory, best for a fixed outlet location rather than portable placement.

First Alert CO710 10-Year Battery Carbon Monoxide Alarm

A sealed, 10-year battery CO alarm with a digital display for both temperature and CO level, built around not needing maintenance rather than being repairable.

Kidde Hardwired Carbon Monoxide Detector with Battery Backup

A straightforward wired CO alarm for homes already on a Kidde interconnect network, with a battery that covers power cuts. It senses carbon monoxide only, and the listing gives conflicting warranty lengths.

Kidde C3010D 10-Year CO Detector with Display

A clear, portable CO alarm for anyone who wants to see actual levels, not just a beep. It detects carbon monoxide only, so smoke alarms are still needed.

First Alert CO410 Battery CO Alarm with Display

A battery carbon monoxide alarm with a digital readout and peak memory that works through power outages. It covers CO only, so you still need smoke alarms.

Klein Tools ET110 CO Meter

A handheld CO meter that reads concentration and temperature with low, high and exposure alarms for HVAC work. It is a portable tester, not a wall-mounted home alarm.

Kidde 30CUDR Smoke and CO Detector 18 Pack

A practical bulk pack for landlords or contractors outfitting many rooms with combined smoke and CO protection without running wires. The listing says nothing about linking units together, so plan on standalone alarms.

First Alert GCO1CN Explosive Gas and Carbon Monoxide Alarm

The step-up First Alert plug-in for homes running gas or propane, since it reads three hazards instead of one and keeps monitoring on battery through an outage.

Kidde COP Plug-In Carbon Monoxide Detector

A straightforward plug-in CO detector with battery backup and a rotating plug, backed by UL 2034 5th edition testing and a 10-year warranty.

First Alert SMICO100-AC Hardwire Smoke and CO Alarm

A practical replacement unit if a hardwired alarm harness is already in place, since the Quick Connect Plug turns the swap into an unscrew-and-reconnect job.

TOPTES CT-580 Portable Carbon Monoxide Detector

Useful as a portable, professional-grade CO meter for spot checks and troubleshooting, not a substitute for a permanently mounted household alarm.

Kidde COPD Plug-In Carbon Monoxide Detector

A straightforward plug-in option for anyone who wants a numeric CO reading instead of a single warning light, with battery backup covering outages.

First Alert CO5120BN Hardwired CO Alarm 2 Pack

A two pack of hardwired carbon monoxide alarms with battery backup for homes with existing alarm wiring. The listing gives almost no detail on voltage, interconnect or warranty.

Sensorcon Inspector CO Monitor INS-CO-01

Kidde COPDLG Carbon Monoxide and Explosive Gas Alarm

Worth the step up from a standard CO-only alarm for a household that wants gas detection and an earlier low-level CO warning in the same plug-in unit.

Kidde COBDL10 10-Year Carbon Monoxide Detector

A sensible CO alarm for households with vulnerable people, adding low-level warnings and a sealed long-life battery. It detects carbon monoxide only and is replaced as a whole unit at end of life.