Stay alert to dangerous gases with this First Alert carbon monoxide alarm. Sensors in this alarm detect CO in the air, setting off a loud 85dB siren to wake up your home's occupants and alert them to danger. Silence false alarms, and test this First Alert carbon monoxide alarm with just a touch of a button.
Q: 1. Is co readout continuous? 2. What is the alarm set point? 2. Is alarm set point adjustable
A: Hi George, thank you for your questions. Underwriters Laboratories Inc. Standard UL2034 requires residential CO alarms to sound when exposed to levels of CO and exposure times as described next. They are measured in parts per million (ppm) of CO over time (in minutes). • If the alarm is exposed to 400 ppm of CO, IT MUST ALARM BETWEEN 4 and 15 MINUTES. • If the alarm is exposed to 150 ppm of CO, IT MUST ALARM BETWEEN 10 and 50 MINUTES. • If the alarm is exposed to 70 ppm if CO, IT MUST ALARM BETWEEN 60 and 240 MINUTES. * Approximately 10% COHb exposure at levels of 10% to 95% Relative Humidity (RH). The unit is designed not to alarm when exposed to a constant level of 30 ppm for 30 days. - Maria
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Stay alert to dangerous gases with this First Alert carbon monoxide alarm. Sensors in this alarm detect CO in the air, setting off a loud 85dB siren to wake up your home's occupants and alert them to danger. Silence false alarms, and test this First Alert carbon monoxide alarm with just a touch of a button.

Detect dangerous CO levels in your home with this First Alert CO615 carbon monoxide alarm. The plug-in design makes installation easy and lets you move the unit from room to room as needed. Battery backup on this First Alert carbon monoxide alarm keeps it working even during a power outage for added peace of mind and security.

Protect yourself from explosive gas and carbon monoxide with this First Alert alarm. It lets you know if propane, natural gas, methane or carbon monoxide are present in your home. This First Alert alarm plugs into any standard outlet, and it has a backup battery for uninterrupted protection during power failures.