Kidde Carbon Monoxide Detector Propane Natural Methane Explosive Gas Alarm Plug-In Wall with 9-Volt Battery Backup Digital LED

We recently switched from an electric oven to gas, so I got the Kidde Nighthawk to keep our kitchen safe. It reliably detects carbon monoxide, propane, natural, and explosive gases. The AC plug-in with battery backup gives extra peace of mind during power outages, and the digital display is easy to read. Setup was simple and it’s been working flawlessly since installation. Highly recommend for anyone using gas appliances. Read more

Easy set up, nice to have, comes with a battery, peace of mind… I purchased another one Read more

I'm about to wax poetic about the "Safety Siren Pro Series 1000" (or whatever demonic device this is). Let's be clear, this thing detects carbon monoxide like a bloodhound sniffs out a dropped hotdog at a picnic. No complaints there. If there's a rogue molecule of CO within a five-mile radius, this thing will know. It's like having a tiny, hyper-vigilant, gas-detecting chihuahua with a PhD in atmospheric chemistry. But, and this is a BIG but, when those batteries start to wane, oh. sweet merciful heavens... it's like a tiny, metal-clad demon has taken up residence in my home. The beeping... the BEEPING... isn't your standard, "Oh, batteries are low, please replace me" chirp. No, this is a sustained, high-pitched, soul-rending wail that sounds like a chorus of dying smoke detectors harmonizing with a dentist's drill. It starts subtly, a little "beep" here, a little "beep" there. You think, "Oh, I'll change them tomorrow." WRONG. You've just signed a pact with auditory torment. Within hours, it evolves into a relentless, rhythmic pulse of pure, unadulterated annoyance. My cat now hides under the sofa, my plants have visibly wilted, and I've started having flashbacks to that scene in Reefer Madness where the guy leaps out the window, convinced he's being chased by jazz demons. I swear, this thing is less a safety device and more a psychological warfare instrument. It's so effective at alerting you to low batteries that you'll replace them out of sheer, unbridled terror. You'll be sprinting to the store, batteries clutched in your trembling hands, like you're carrying the antidote to the apocalypse. Five stars for gas detection, minus a million for auditory assault. If you value your sanity, buy this thing, but keep a fresh pack of batteries on standby, and maybe invest in some industrial-grade earplugs. You've been warned. Read more

Year old, with a bad battery. I ordered and received the unit the same day. It was new old stock (NOS) made late 2024. Not idea. AND even worse, as soon as I plugged it in, the unit alarm started sounding with what looked like an "L6" error display. Turns out that was actually a "L" as in "Low" and "b" as in "battery". So I checked and indeed the shipped bat was low. I replaced it, after calming my family down about false alert, and the unit is now working properly. I'm ordering two more and will update this review if those two are newer and/or have good batteries. Read more

I was a little apprehensive buying this, as there were some "don't work" reviews, and, well, I NEED this to work. Oddly enough, we had a situation just a week later: We already had an older, ceiling-mounted CO detector (First Alert), and set this one up in a different part of the basement. We got 9+ inches of rain in a day and a half, and the storm sewers were backing up. Got home early in the evening. We had some water in the basement (not too much), but BOTH alarms went off!! In 41 years in this house, we'd never had our CO alarm go off. Being both went off, we knew it was real. The reading was 47 in the basement, but nothing upstairs. It showed a historical (that day) high of 145!! The numbers kept slowly decreasing, until, about 2 hours later, it was gone. Our FirstAlert is an audio alarm only, with no readout. Having the actual CO numbers is HUGELY beneficial!!! Can't comment on the gas detector yet (knock on wood). No buyer's remorse here! Read more

Great quality product, test it every so often and works well every time. I would buy this same one and this brand, again if needed in the future. We use this in our basement. Read more

Good: The perfect alarm for a detached garage. Detects smoke, CO, natural gas AND propane, with a display on the front that shows levels of same even when they're too low to trigger the alarm. Alarm is loud enough to hear in the house, eight feet away. Plugs directly into an outlet, or you can detach the power supply and mount the alarm away from the outlet. Pricey, but you get a lot for that price. Bad: Not the most stylish unit. But, in the garage, who cares? At this price point, would have preferred a 10-year lithium backup battery in place of a 9-volt. Bottom line: This is the second unit of this type I've owned, the first reaching end of life after 10 years (CO alarms wear out eventually) and cheeping nonstop to announce same. I tested this one, briefly, with my lawn mower running in a closed garage (with me outside a cracked side door, just in case.) It did indeed start reporting CO levels at around 40 ppm, which steadily climbed until the alarm sounded at about 100 ppm. (Whereupon I held my breath, quickly went in, shut down the mower, opened the big door, went back out and waited until the CO level became too low to measure.) The only additional function I wish it had is a remote link, wifi or whatever, to notify me when I'm unable to hear the alarm. No complaints otherwise. Five stars. Read more