4.9/5 (7,249 Reviews)

Know What's In Your Air With SentinelAir

Hospital-grade carbon monoxide monitoring that shows you the actual PPM in every room of your home — in real time, from 1 PPM — so you always know what your family is breathing.

What SentinelAir Does

Shows the exact CO level in your home in real time — from 1 PPM — on a digital display

Uses hospital-grade electrochemical sensors, not the cheap metal oxide kind in standard detectors

Alarms at 30 PPM in an emergency — hours earlier than standard detectors

Plugs into any standard outlet — no tools, no wiring, no installation

BUY MORE - SAVE MORE

  • encrypted Secure checkout
  • check 365-Day Guarantee
SentinelAir

SentinelAir

$79.95
$79.95 $149.95
SAVE 46% Sold out
 
 
add_shopping_cart

-

Ordered

local_shipping

- - -

Order Ready

redeem

- - -

Delivered

  • files/im1313.webp
    "SentinelAir Told Me In 10 Seconds What My Doctor Couldn't Tell Me In 6 Months"

    I'd been waking up with headaches for almost seven months. Doctor visits, bloodwork, a sleep study — every test came back normal. I was told it was probably stress.

    The night I plugged SentinelAir in, I saw 17 PPM in my kitchen. 14 PPM in the hallway. I called an HVAC tech the next morning and it turned out our gas stove had a fault I'd never have spotted on my own.

    Two days after he fixed it, my headaches were gone. I still can't believe I spent seven months looking for an answer that was in my air the whole time.

    Jennifer M
  • files/Screenshot_1_93fdd26a-6735-4330-a37a-410997a07eef.png
    "I thought my son had anxiety. It was carbon monoxide.


    For 8 months my 9-year-old was waking up with headaches and couldn't focus at school. His teacher thought it was ADHD. I thought it was the stress of changing schools. We tried everything. Then my neighbour mentioned she'd got a SentinelAir and I bought one just to rule it out. First night: 19 PPM in his bedroom. Called the gas company the next morning — cracked heat exchanger in our ducted heating. After the repair the readings dropped to 0. He hasn't had a single headache in 6 weeks. I sobbed when I realised what had been happening to him all winter.

    Sarah M.
  • files/Screenshot_2_213bcc8c-2c22-4e03-a351-a3b69d1d2737.png
    My old detector had a green light. It was lying to me.


    I'm an electrician. I thought I knew about home safety. Had a CO detector installed for 6 years, tested it every few months, green light always on. Got a SentinelAir because a client asked me about them. Plugged it in next to my old one to compare. My old detector: green light, silent. SentinelAir: 31 PPM and climbing. Found a gas leak in the water heater that had probably been there for months. The worst part? My kids sleep on that side of the house. I've since recommended SentinelAir to every client I have

    Mark P.
    View full details

    SentinelAir vs. Standard CO Detectors

      Others
    Real-time digital display
    Alarms at low CO levels
    Detects natural gas & propane
    Hospital-grade sensor
    Shows exact PPM number
    Lasts up to 10 years
    Plugs into any outlet
    Works while you sleep

    Trustpilot reviews

    Excellent 4.9 / 5

    • Standard alarms aren't enough.

      Regular alarms wait until it's an emergency. SentinelAir detects from 1 PPM, protecting my babies' little lungs hours before a standard detector would even beep.

      Jessica H.

    • Plug and play safety!

      No tools, no wiring, no stress. I literally just plugged it into the hallway outlet. Hospital-grade safety for my family in 5 seconds. Every mom needs this!

      Amanda B.

    • No more guessing if it actually works.

      I never trusted those outdated ceiling alarms with just a blinking green light. As a dad, seeing the exact number on the SentinelAir screen means I know for a fact my family is protected. I just bought a 3-pack so we have one on every floor.

      Mike T.

      Questions From Homeowners

      check_box

      Will it false alarm when I cook on my gas stove?

      No. SentinelAir uses professional-grade electrochemical sensors designed to detect carbon monoxide specifically — not cooking fumes, smoke, or steam. You may see the real-time display tick up slightly while you cook, which is exactly what it's supposed to do — it's showing you the actual CO level at that moment. The 30 PPM alarm only triggers when CO reaches a genuine intervention threshold.

      Completely different. Standard detectors sold at Home Depot or Lowe's use cheap metal oxide sensors and are built to alarm only at 70–100 PPM — legal minimum, nothing more. They can't detect the low-level CO that causes chronic daily symptoms. SentinelAir uses hospital-grade electrochemical sensors — the same technology used in emergency rooms — and displays the exact PPM in your home in real time, starting from 1 PPM. It's built to a fundamentally different standard.

      We recommend one near each major gas appliance — kitchen, water heater, furnace — and one in the rooms where your family sleeps. Most homes need multiple units to cover every potential source, which is exactly why we offer bundle pricing. The more units you have, the more complete your coverage, and the lower the cost per unit.

      It's not installation — it's just plugging it in. Any standard wall outlet works. No tools, no wiring, no ladder, no electrician. It begins monitoring the moment it's plugged in, and the display updates in real time.

      Write down the reading and the room you saw it in, then call a licensed HVAC technician. They'll be able to identify which appliance is the source and repair it. In most cases, it's a routine fix — a blocked vent, a cracked heat exchanger, a faulty burner. Once the problem is resolved, your SentinelAir reading will confirm the fix.

      Up to 10 years. And unlike standard detectors that quietly stop working after 5–7 years without telling you, SentinelAir alerts you before it expires — so you always know it's actively protecting you.

      365-day, 100% money-back guarantee. Plug SentinelAir in, check your air, and if you're not satisfied for any reason, contact us within 365 days for a full refund. No questions.

      Standard delivery is 3–5 business days.