Carbon dating accuracy to within

Great Product - 05/04/2015 Reviewer: James Ferace seems to be working good.

Remote mute silences nuisance alarms by pressing any button on a standard household remote control (remote not included). Carbon monoxide detector utilizes electrochemical sensor for increased accuracy. NOTE: If you mount the Alarm high on a wall, make sure it is at least 4 inches (102 mm) down from the ceiling. So that told me that it had seen its useful LIFE TIME. Very useful safety device - 09/25/2017 Reviewer: Vic Monzon I wanted a device that would give me a level of threat for CO detection. I give it a TEN :- Totally electrric - 02/11/2017 Reviewer: Scott Waterman After placing the order, within days the requested alarm was at our home and within minutes up and operating.Mine have always been zero if I saw anything else, I would look for furnace, water heater, stove, or other appliance malfunctions. But they are available as a PDF on the First Alert web site, easily readable.Some people have complained that it does not display the reading constantly, without pressing a button I suspect this would drain the batteries more quickly in case of a power outage. You can plug in the unit at ground level and install it much higher, so you can read it easily, and also have the unit sense readings higher off the ground. I bought two of these carbon monoxide detectors from Amazon two years ago, in April, 2010, and I wanted to buy a third this year.To avoid purchasing very old stock, I bought the third unit directly from First Alert, and I received a product only one year old. Easy to test, easy to see, easy to install, easy to comply with the new law.

I wish there were some safe way of testing a carbon monoxide alarm, aside from pushing the test button - something equivalent to lighting a candle under a smoke detector. I love the light up display that tracks CO levels in the home. I love the backup battery - NEVER HAVE TO REPLACE EXPENSIVE BATTERIES AGAIN.... This monitor is a winner and I highly recommend it!

I recently attended a New York City Fire Department presentation, which advised that CO detectors should be replaced no later than 7 years after their date of manufacture.