Walmart has
First Alert SCO2 Combination Smoke & Carbon Monoxide Alarm w/ 9V Battery (1039935) for
$12. Shipping is free w/ Walmart+ (
free trial available) or on orders $35+, otherwise select locations have stock for store pickup.
Thanks to Deal Hunter
niki4h for finding this deal.
About this item:
- Electrochemical Carbon Monoxide Sensor - the most accurate sensor available as compared to other sensing technologies
- Two Latching features: Alarm latch to easily identify initiating alarm after alarm condition has subsided. Low battery latch: to visually identify which unit is in low battery condition.
- Two Silence Features: Alarm Silence to temporarily silence nuisance alarms. Low Battery Silence to silence low battery chirp for up to 8 hours.
- Intelligent Sensing Technology helps reduce the number of nuisance alarms
- Includes mounting anchors and screws.
- End of Life Signal provides audible notification alarms needs to be replaced
- 10-Year Limited Warranty
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Basically the type detectors require a large amount of dense smoke in a short amount of time to block the ionizing sensor and set the alarm off. Which is why it has so many false alarms for the kitchen and why it's deadly for detecting fires in the bedroom because by the time the smoke is dense enough to set it off in the bedroom it's likely to late to escape. On the other hand type sensors use cameras to detect smoke and are highly sensitive to small amounts of smoke yet at the same time are able to identify cooking smoke via algorithms so it doesn't give as many false alarms in the kitchen, while also giving life saving early alarms in the bedroom.
I had no idea different types of smoke alarms existed until I came across that video. But look it up for yourself and you will find fire chief after fire chief from all over the country saying to buy over or at the very least make sure you have in the bedroom.
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This also list 10-year warranty, implying life span is 10-year, but apparently lifespan is 5-7 years:
https://www.firstalert.
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