Our Top Choice
Nest Protect Smoke & Carbon Monoxide Alarm
Nest goes beyond safety with these convenient features: the Protect Smoke+CO Alarm feature wifi sync and pre-alarm warnings.
Wifi Sync. Battery life indicator. App connectivity. Split-spectrum sensor for emergency information. Heads-up alerts.
A bit more expensive than basic models.
5.3" x 1.5" x 5.3", 1 lb.
Displays through smartphone
2-year limited warranty
First Alert Digital Carbon Monoxide Detector
First Alert is one of America’s most trusted brands in home safety. Their Dual-powered CO Detector offers protection for your family or business as well as peace of mind.
Front-access batteries. Dual-power design. No mounting required. Simple test and silence button.
May not last as long as more expensive models.
8.4" x 6.9" x 3", 12 oz.
Plug-in with Battery Back-up
7-year Limited Warranty
6-foot power cord
Sensorcon Portable CO Inspector
Sensorcon creates durable USA-made inspection tools like this portable CO detector for reliable, long-lasting safety.
Durable, waterproof construction. 2-year battery life. Large, simple LCD display. Handheld. Certified intrinsically safe. Good for industrial use.
Not meant for wall-mounting like the others on this list.
3.2" x 2.2" x 0.9", 4 oz.
Kidde Smoke & Carbon Monoxide Detector
Kidde improves safety at home and at work with alarms like the Hardwired CO & Smoke Alarm with battery back-up power.
Connects with up to 24 other alarms. Battery back-up. Front-loading batteries. Hush feature. Detects fast-burning fires.
No display, but instead uses flashing lights and sound to indicate different situations.
2" x 6" x 6", 1.2 lbs.
Connects with other Alarms
Universal Security Instruments Carbon Monoxide Detector.
Universal Security Instruments uses smart technology and superior design to maximize security like in this CO Detector.
10-year sealed battery. Smart microprocessors to reduce nuisance alarms. Can be mounted or left standing on a tabletop.
A few users received defective units and had to get their alarms replaced.
2.2" x 5" x 5", 6.4 oz.
10-Year Limited Warranty