Protect your family from the silent killer
See the air your family breathes — live, from 0 PPM.
- ✓Reads CO from 0 — old alarms wait for 70
- ✓Plugs in anywhere in 30 seconds
- ✓Live number = daily proof it works
Try It Risk-Free With Our 100-Night Guarantee
As a firefighter myself, I take this stuff seriously. Saw a post about these online and ended up ordering the 4-pack for our house. All four were plugged in within a few minutes and they’ve been working perfectly since. Highly recommend!!
Sentivo Detector™ warns you first
It doesn’t wait until the air is dangerous. You see the number rise from zero — and act before a late alarm becomes the first sign of trouble.
Your alarm is built to stay silent until it’s almost too late.
Not broken. Not old. Designed. Everything under 70 PPM, it treats as nothing — and that gap is why CO still sends 100,000+ Americans to the ER and kills 450+ every year, most with a “working” detector on the wall. Because the body doesn’t wait for 70:
Headache, fatigue, nausea
Physical stress increases
Most alarms finally react
What makes Sentivo Detector™ earlier, smarter & safer.
Silent Until 70 PPM
Headaches and fatigue can already start — especially in kids — and your alarm says nothing.
Live From 0 PPM
Sentivo Detector™ shows the exact number the moment CO starts to rise — long before any symptom.
Waits Up To 4 Hours
Even at 70 PPM, a standard alarm can legally wait hours before making a single sound.
Instant Awareness
One glance at the screen tells you exactly what’s in the air — no waiting for a siren.
No Proof It Works
The green light keeps glowing over a dead sensor — most owners never know theirs stopped.
Proof It’s Alive, Daily
The live reading is daily proof the sensor is working — every time you walk past.
Blind To Gas Leaks
CO-only detectors can’t see natural gas or propane — two of the three gas risks in a home.
3 Gases, 1 Screen
CO, natural gas and propane — monitored together on a single display.
Cries Wolf Over Dinner
Nuisance alarms from cooking teach families to ignore the beep — or pull the batteries.
No False Alarms
It reads gas levels, not smoke or steam — searing a steak never sets it off.
And yes — there’s a loud emergency siren built in
Why 21,537+ families trust Sentivo Detector™.
Sees CO From
0 PPM
A live number on the screen from the very first trace — weeks before a standard alarm would ever make a sound.
Catches Gas &
Propane Too
Three gas threats under one roof, one screen watching all of them. A CO-only alarm is blind to two of the three.
30-Second
Plug-In Install
Any US outlet. No ladder, no tools, no electrician — and no batteries to die in the middle of the night. Standard outlet height works perfectly: CO mixes evenly with air.
Temp & Humidity
Built In
Useful every single day — so you actually glance at it, instead of forgetting it like a beeping disc on the ceiling.
Proof It’s Working,
Every Day
The live reading is daily proof the sensor is alive. No more trusting a green light over a dead detector.
Affordable For
Every Room
Priced so you can cover every floor and every bedroom — the coverage the NFPA actually recommends.
Hear from families we’ve helped protect.
Protected
Caught It In Week One!
Tuesday morning I saw 23 PPM in the basement. My old alarm upstairs? Quiet as always. Cracked heat exchanger on a 9-year-old furnace. Just get the 4-pack, don’t mess around with this stuff.
For My Dad
My dad is 78 and lives alone. Bought him the 2-pack and drove over to plug them in myself. Now when I call him Sundays the first thing I ask is what’s the number say, and he reads it to me. Zero every time.
Caught A Problem Early
Reading 12 PPM in the laundry room three days after installing. The gas dryer vent had come loose behind the wall. No symptoms, no beeping alarm — just a number that told us something was wrong.
For Our New Baby
Gas furnace and a baby on the way — my OB told us to upgrade our CO detectors. The 4-pack arrived in 2 days and they were all plugged in before dinner. Knowing it’s 0 outside the nursery lets me sleep.
- ✓1 Sentivo Detector™ detector
$138$69 - ✓100-night trial + lifetime warranty
- ✕Silent Killer Home Audit™$47
- ✕10-Minute Family Emergency Plan$29
- ✕Home Placement Map$19
- ✓4 Sentivo Detector™ detectors
$399$199 - ★Silent Killer Home Audit™$47
- ★10-Minute Family Emergency Plan$29
- ★Home Placement Map$19
- ✓100-night trial + lifetime warranty + free US shipping
- ✓8 Sentivo Detector™ detectors
$789$339 - ★Silent Killer Home Audit™ ×2$94
- ★Emergency Plan + Placement Maps$48
- ✓100-night trial + lifetime warranty + free US shipping
The Sleep Easy Guarantee
Try Sentivo Detector™ in your own home for 100 nights. If you don’t sleep easier knowing what’s in your family’s air, send them back for a full refund — we even cover return shipping.
Frequently Asked Questions
Jessica from Tampa asks,How is this different from the detector I already own?
Next question is from Amy,Where do I put it? What height?
Ryan from Boston says,How many do I need?
Liz from Denver emails and says,Will it false-alarm when I cook?
Jenna asks,How do I know the sensor still works?
Mark from Cleveland asks,What if it doesn’t work for me?
Priya from Austin asks,Can I use it in a rental or RV?
?Still have questions?
Real humans, usually within the hour during business hours. Pick whatever’s easiest:
How many Sentivo Detector™s should you have?
Make sure you have at least one on every floor and one outside every sleeping area — the coverage the NFPA recommends. That way, a rising number is never more than a glance away. Most families add one near the garage or water heater too.
Real questions. Real people.
2,847 comments · sorted by Top
Is this legit or another one of those dropship gadgets? my feed keeps showing it and now my husband wants 4 of them lol
had ours since March. it’s basically a little screen that shows the CO number, sits in the outlet by the kitchen. reads 0 most days, went to 4 when i ran the generator in the garage with the door cracked. that was enough for me to move the generator outside.
ok that’s actually helpful thank you
Bought the 4 pack in November when the furnace kicked on. Basement unit read 9-11 ppm for two days straight. Furnace guy found a partially blocked flue. $180 fix. The old detector never chirped once. I don’t usually write reviews but this one earned it.
how loud is the alarm if it actually goes off? our bedrooms are upstairs
set mine off with the test button, it’s LOUD. like smoke alarm loud. you’d hear it upstairs no problem
Firefighter here, 14 years. We carry CO monitors on every call — first thing we check on a CO run is the number, because symptoms start way before a standard alarm triggers. Glad to finally see a consumer version with a real display. Two in my house.
bought one, then bought three more a week later. wish i’d just gotten the 4 pack first ha. anyway the humidity readout is weirdly useful, my basement runs damp
Shipping took 6 days out here which felt slow, but the unit itself is solid. Reads a steady 0, spiked to 3 when I was searing steaks with the windows shut lol. At least I know it actually works.
Got one for my mom’s condo after her neighbor’s CO scare in January. She calls it her “little weather station” because of the temp display. Whatever gets her to keep it plugged in, honestly.
does it work on 230v European outlets? visiting my parents in Ohio next month but we live in Germany
Hey Lukas — it’s built for standard US 110-120V outlets. In the EU you’d need a plug adapter with voltage conversion, so we only recommend it for US homes right now. Great gift for your parents’ place though!
RV people: yes it fits the outlet by the dinette and no it doesn’t false alarm from the propane fridge. Two trips so far, reads 0-2 while driving with the genny on. Exactly what we wanted.
honestly i assumed my house was fine. and it is — reads 0 every day. weirdly that’s the point? i’m paying to know instead of hope and i’m ok with that
my toddler points at the screen every morning and yells ZERO!! cutest safety briefing ever
Compared it against the meter my brother-in-law brought home from his station (he’s on Engine 42). Both read within 1 ppm of each other. Good enough for me.
does anyone know if landlords are required to provide CO detectors in MA? asking before i buy my own
In MA yes, but the required ones are the dumb beep kind. I keep the landlord’s one on the ceiling and this one in the outlet. Belt and suspenders.
waited until it arrived to comment. box was smaller than expected, units feel solid, display is brighter than the product pics. no complaints so far
Showing 3 of 2,847 · 94% of commenters recommend Sentivo Detector™