Carbon monoxide has no smell, no colour and no warning. Your smoke detector can't see it, and most CO alarms stay silent until levels are already dangerous. Veloura shows you live readings the moment something changes, so your family has time to get out.
Veloura™ 6-in-1 Smoke, Gas & CO Detector
4 interest-free installments, or from $5.90/mo with Shop Pay
Smoke, Gas & CO Protection For 107,000+ Families
- Detects smoke, gas leaks & carbon monoxide in one.
- Live CO readings from 0 PPM. No more guessing.
- Charges while plugged in. Works through power outages.
- Plugs into any outlet or magnets to your fridge.
How It Works
Plug it into any standard outlet and it starts monitoring instantly. No setup, no app, no wiring. The electrochemical CO sensor, gas sensor and smoke sensor read your air around the clock and show live CO numbers, room temperature and humidity on the colour display. If levels start climbing, the alarm sounds long before you would ever feel symptoms.
How many do I need?
Start with the bedroom, because carbon monoxide is most dangerous while you sleep. Most families run two: one near the bedrooms and one in the kitchen or living area near the gas appliances. Add a third for the garage, the basement, or a parent or college kid who lives on their own.
How is this different from my smoke detector?
A smoke detector only checks for smoke. It is blind to gas leaks and carbon monoxide, and the only thing it tells you is when its battery is dying. Veloura covers smoke, gas and CO in a single unit, shows you real-time CO numbers from 0 PPM, alarms at 50 PPM instead of waiting for 70, and keeps working for 12 hours on battery backup if the power goes out.
Returns & Guarantee
Try it for 30 days. If it is not right for your home, send it back for a full refund, no restocking fees. Every detector is also covered by a free 3-year warranty.
See danger early. Act before it's too late.
The detector safety pros are replacing smoke alarms with.
HVAC techs and home inspectors know the pattern too well: a family trusts a “working” smoke alarm, but it was never built to catch a gas leak or carbon monoxide. Veloura watches for all three and makes rising levels visible instantly from 0 PPM, so you have time to act.

Trusted by the pros who check gas appliances for a living
Check your furnace, water heater and stove connections in seconds with the Veloura detector. Real numbers on screen, not a green light you have to trust.
Frequently asked questions
Your smoke detector only checks for smoke. It can't see a gas leak, and it can't see carbon monoxide, which has no smell and no colour. The only thing it tells you is when its battery is dying, usually at 3 AM.
Even a standard CO alarm waits until 70 PPM to sound, and the UL 2034 standard allows it up to 4 hours to respond at that level. By then you've been breathing poison for hours.
Veloura covers smoke, gas and CO in one unit and shows you real CO numbers from 0 PPM in real time. You see danger building before it becomes dangerous, not after.
Yes. Veloura has a 12-hour built-in backup battery that charges automatically while it's plugged in. When the power drops, a breaker trips, or you unplug it to move rooms, Veloura keeps watching.
- Single Unit: Put it where you sleep. Carbon monoxide is most dangerous at night.
- 2-Pack (Most Popular): One near the bedrooms to protect you at night, and one in the kitchen or living area near the stove, furnace or water heater.
- 3-Pack (Best Value): Bedroom, kitchen and garage or basement. Or two for your home and one for a parent, a college kid, or an apartment.
Placement: Mount it 4-5 ft high for CO. Avoid placing it directly across from stove burners, in front of air vents, or behind curtains.
Veloura uses industrial-grade electrochemical and photoelectric sensors with selective gas detection, far less prone to false alarms than older ceiling detectors. The CO sensor specifically targets carbon monoxide and won't trigger from normal cooking steam, shower humidity, or aerosol sprays.
Avoid placing it directly across from a stove burner if you cook frequently with high heat.
Yes. Swap the plug for the included magnet mount and stick it to the fridge, or drop it in your bag. It runs on its own battery, so it works in hotels, Airbnbs, dorm rooms, campers and RVs, or at an elderly parent's place. Anywhere you want a little more peace of mind.
Most detectors only let you press a test button that checks the speaker, not the sensor. So you press the button, hear a beep, and assume it's working. The sensor inside could be completely dead and the button would still beep.
With Veloura, you don't have to guess. The screen shows you real-time numbers. CO at 0 PPM. Temperature. Humidity. The numbers themselves are the proof. If they're changing in response to your environment, the sensors are working.
Yes. The alarm is built to wake you from a deep sleep, and there's a test button so you can hear it for yourself. Volume is adjustable, and night mode dims the display so it doubles as a soft nightlight in a kid's room or hallway without keeping anyone awake.