4.8 | Trusted across 11,662 reviews

Alveo 4 In 1 CO Detector

  • Shows live gas levels in real time
  • Detects carbon monoxide, natural gas, and propane
  • Alerts before 30 PPM
  • Earlier warning instead of a late-stage alarm
  • Recommended by Firefighters and HVAC pro's
Single unit x1
Single Unit

For a single room

$44.95$99.95
Buy 2 Get 1 Free x3
Buy 2, Get 1 FREE

Covers the main living areas

$89.95 $299.85
Buy 3 Get 2 Free x5
Buy 3, Get 2 FREE

Every bedroom + main areas covered

$129.95 $499.75
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100-day money-back guarantee — free returns, free replacements.

How to Install

Plug Alveo into any outlet. Wait 200 seconds for the sensor to calibrate. That's it. You're protected. No tools. No ladder. No complicated setup. And unlike smoke detectors, height doesn't matter for carbon monoxide it mixes evenly with air. So any outlet works. Bedroom. Kitchen. Hallway. Plug in and you're covered.

How many do I need?

3 to 4 detectors is ideal for full home protection. Place one near the bedrooms, one near the kitchen, one near your furnace or water heater, and one on any additional floor. That way you're covered where you sleep, where you cook, and where gas appliances run.

What do the readings mean?

PPM — The amount of carbon monoxide in your air. Zero means clean air. The higher the number, the more CO is present. Alveo alarms before 30 PPM.

GAS LEL — The percentage of natural gas or propane in your air. Zero means no leak. Any number above zero means gas is leaking somewhere. Act immediately.

Humidity — The moisture level in your home. Shown as a percentage. Normal is between 30-50%. Helps you keep your air comfortable and healthy.

All three. One screen. Real numbers. No guessing.

How is this different from a standard detector?

Standard detectors show a green light. Alveo shows real numbers.

Standard detectors alarm at 70 PPM. Alveo alarms before 30 PPM.

Standard detectors only see carbon monoxide. Alveo sees carbon monoxide, natural gas, and propane.

Standard detectors use cheap grade 1 sensors. Alveo uses grade 3 sensors — faster, more accurate, longer lasting.

Standard detectors make you guess. Alveo lets you know.

Loved by thousands

Earlier warning gives households more time to act.

Carbon monoxide builds quietly. Detectors that only alarm at higher thresholds leave households with less time to respond. Alveo helps make rising gas levels visible earlier through live PPM readings and low-threshold alerts.

Standard CO detector — green light only

What standard detectors miss

  • Green light confirms power, not safe air
  • Most alarms react only at higher thresholds
  • CO-only detection leaves other gas risks uncovered
Alveo unit showing live PPM readings

How Alveo helps

  • Shows live gas readings directly on screen
  • Helps you spot rising levels from 30+ PPM
  • Detects carbon monoxide, natural gas, and propane

Helps protect your family earlier

What earlier visibility changes

Carbon monoxide builds quietly. Standard detectors stay silent until 70 PPM — by then it's already dangerous. Alveo alarms before 30 PPM. That early warning gives your family time to get out, ventilate, and act before symptoms start.

Firefighter testimonial

Visible readings, broader detection, and earlier awareness create a more trustworthy safety experience than a status-light-only detector.

Fire fighter
0%
More visible confidence
0%
More confidence in protecting every room
Firefighter testimonial

Visible readings, broader detection, and earlier awareness create a more trustworthy safety experience than a status-light-only detector.

Fire fighter
Alveo plugged in beside a family at home

Alveo catches it earlier

Alveo doesn't wait until the levels are dangerous to alert you. It reacts at the first signs of buildup — so your family has room to act, not just react when the standard alarm finally trips.

What carbon monoxide does to the body

CO is colorless and odorless. By the time most detectors trip, your body has already been absorbing it for hours. Earlier visibility gives you back the time those alarms take away.

30 PPM
Headache, fatigue, nausea
50 PPM
Physical stress increases
70 PPM
Most alarms finally react
The science behind Alveo 1/3

Measured, not assumed

Alveo combines live PPM visibility with carbon monoxide, natural gas, and propane detection, helping households understand rising risk earlier instead of waiting for a late alarm threshold.

The science behind Alveo 2/3

Broader than CO alone

Alveo combines live PPM visibility with broader gas detection so households can understand rising risk earlier instead of waiting for a late alarm threshold.

The science behind Alveo 3/3

Earlier point of awareness

Visibility begins from 30+ PPM, helping households respond before a higher-threshold alarm becomes the first warning.

Trusted by 10,000+ households

Dr. Jameson with family

“I got 4 for myself. Then I got 4 more for my daughter. Those old green light detectors are gone. My grandkids deserve real protection.”

Dr. Jameson
Mark M holding the Alveo detector

“All those years trusting a little green light. Never again. Got Alveo for myself and made sure my son had them too.”

Mark M
Charles K in his RV with the Alveo detector

“We sleep in our RV 100+ nights a year. Trusted a green light that whole time. Switched to Alveo and now I actually know what we’re breathing. Small space, big risk. Real numbers matter more in an RV.”

Charles K
Frank Johnson, firefighter, installing the Alveo detector

“I respond to CO calls. I’ve seen detectors that never went off. Green light glowing while families were poisoned. That’s why I have Alveo plugged in at home. I know what real protection looks like. This is it.”

Frank Johnson

Don’t wait for the alarm to catch up.

Carbon monoxide builds quietly. The real risk is believing you’re safe when your detector shows no warning.

400+
Deaths Annually
CO exposure remains a serious household safety risk.
100K+
Emergency Visits
Accidental exposure leads to thousands of hospital visits.
Firefighters, HVAC technicians, and homeowners using the Alveo detector

Built with firefighter insight. Built to save lives.

Firefighters know the pattern too well: families trust a “working” detector, but the warning comes too late. Alveo is built to make rising gas levels visible earlier, so households have more time to act.

What makes Alveo different

Alveo Alveo detector
Most Detectors

Shows real-time CO levels

Live PPM
Green light

Alerts you hours earlier

See rise
Late alarm

Detects natural gas+ propane

3-in-1
CO only

Easy install

Plug-in fast
Ladder setup

Smarter monitoring

Smart sensing
Delayed alert

What the test really tells you

Live screen
Speaker test

You’ll know, or you’ll get every penny back.

Every Alveo detector ships with a 100-day risk-free trial and a 3-year warranty. If it doesn’t earn its spot in your home, send it back — return shipping covered.

100 Days
Risk-free trial period
3 Years
Warranty included
0.7%
Refund rate

Frequently asked questions

Does it detect natural gas and propane, or only CO?

All three. Alveo monitors carbon monoxide, natural gas, and propane on a single screen — three real risks tracked from one device.

How many detectors do I need?

3 to 4 units cover most homes. Plan one near the bedrooms, one near the kitchen, one by the furnace or water heater, and one per additional floor — that way you have coverage where you sleep, where you cook, and where gas appliances run.

Does it matter how high I install the detector?

Not for CO — carbon monoxide mixes evenly through room air, so any outlet works fine. If your primary concern is a natural gas leak (a fire/explosion risk rather than the silent risk CO carries), mount it as high as you reasonably can.

How long does the sensor last?

The sensor is built for years of continuous use, and every Alveo unit ships with a 3-year warranty on top of that.

How do I know it is working?

The display shows the live gas reading at all times. If there’s a number on the screen, the sensor is actively reading the air around it.

Is it difficult to set up?

Plug it into any outlet. No Wi-Fi, no app, no batteries — wait around 3 minutes for the sensor to calibrate, and you’re protected.