✓ UL 2034 Certified — Strictest CO detector standards in North America
✓ Professional-Grade Sensors — Same technology used by fire departments
✓ ETL Listed — Independently tested for safety and accuracy
Like having a fire station in your hallway — watching the air so you don't have to.
Over 500,000+ Homes upgraded already
My Son Asked Me What The Numbers Mean. Best Question He Ever Asked.-
"I was showing my 4 year old how it works and he pointed at the screen and asked what the numbers meant. I told him it means our air is safe tonight. He smiled and said good. I cried a little. This device gave me something I did not even know I needed. Not just protection. Proof. Every morning I look at it and I know my kids are breathing clean air. That is worth everything to me."-Ashley K.
My Husband Said I Was Overreacting. He Installed Three More The Next Day. - "I ordered FirstWatch after my neighbor told me about a CO scare in her building. My husband rolled his eyes and said I worried too much. I plugged it in anyway. That evening it showed a reading neither of us expected. He went on the website that same night and ordered the six pack. He has not said a word about me overreacting since. This device does not argue with you. It just shows you the truth."-Donna R.
Plugs In. Reads Immediately. Never Stops Watching. - "I did not think something this small could do what it does. Plugged it in next to my furnace and within seconds it was showing me the exact CO level in parts per million. My old detector just had a light. Green meant safe. That was all the information I got. FirstWatch shows me the actual number every single minute of every single day. There is no going back to blind trust after you have seen the real number."-Robert M.
Carbon monoxide is the #1 cause of accidental poisoning deaths in America.
Every year, over 400 Americans die from CO poisoning most of them while sleeping. The tragedy? Almost every victim had a "working" detector on their wall. Green light glowing. Silent. CO comes from furnaces, water heaters, garages, stoves. You can't smell it. You can't see it.
You just don't wake up.
Most detectors only show a green light which stays on even when the sensor is dead. They don't alarm until 70 PPM, which is AFTER 1-4 hours of exposure. First Watch shows you real-time levels from 0 PPM on a digital display. You see the truth, not a light that lies.
No. First Watch uses professional-grade electrochemical sensors the same type used in industrial settings. They detect real threats, not toast or shower steam.
First Watch is a 4-in-1 detector. It monitors carbon monoxide, natural gas, AND propane, plus temperature and humidity. This is a critical distinction. Most cheap detectors from the hardware store only detect CO. If your stove leaks natural gas, your furnace has a propane leak, or your water heater line is compromised, those detectors stay completely silent. First Watch catches all three gas threats in real-time, with PPM readings on the display starting at 0. One unit. Complete protection. No gaps.
First Watch plugs into any standard wall outlet, no ladder, no tools, no electrician. 30 seconds and you're protected. For placement, focus on two priorities: near gas appliances (furnaces, stoves, water heaters) and in hallways outside bedrooms where your family sleeps. First Watch's sensors are calibrated to detect all three regardless of outlet height. Most families start with one near the furnace/water heater, one in the kitchen near the stove, and one in the hallway outside bedrooms. The 4-Pack covers most homes completely.
7-12 business days typically.
No. Plug it into any eye-level outlet. That's it. Takes 30 seconds. No ladder, no tools, no electrician.
One per floor + near bedrooms + near gas appliances (furnace, water heater, garage). Most homes need 4. Apartments typically need 2.
Yes! First Watch is perfect for people who live alone. It watches 24/7 and will alert you to danger even while you're sleeping. Many of our customers are seniors who live independently and wanted peace of mind.
You're covered by our 30-Day "Sleep in Peace" Guarantee. If you're not satisfied for any reason, we'll refund every penny. No questions.
Hardwired means it runs on electricity, but the SENSOR inside still expires after 5-7 years. The green light stays on even when the sensor is dead. First Watch plugs in and shows you a real number, so you always know it's working.
