Sentry AirGuard
Sentry AirGuard
Most carbon monoxide alarms stay silent until levels are much higher.
Sentry AirGuard alerts from 50 PPM, giving you earlier awareness when every minute matters.
Over 20,000 secured homes
More than 21,957 people trust Sentry AirGuard
Carbon monoxide safety, detector performance, and public awareness have been extensively studied by independent researchers and public health organizations.
UL (Consumer Carbon Monoxide Safety Research) — Found that 60% of Americans could not identify a single sign of a carbon monoxide leak, highlighting how invisible and misunderstood this danger remains.
Washington State Carbon Monoxide Alarm Study — After CO alarm legislation, ownership increased significantly, yet researchers found many households still lacked working protection or awareness of detector maintenance and replacement.
Carbon Monoxide Detector Performance Study — Testing of residential carbon monoxide alarms found that approximately 40% of detectors in use failed to alarm at hazardous CO concentrations, with older units performing worst. The findings reinforce the importance of maintaining and replacing detectors as recommended.
These studies relate to carbon monoxide awareness, detector performance, and residential safety—not specifically to Sentry AirGuard.
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Detects Carbon Monoxide Starting From 30 PPM
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5-in-1 Air Monitoring (CO • Gas • Smoke • Temperature • Humidity).
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Portable Protection For Home, RV, Hotels & Airbnb
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Loud 100dB Alarm + Real-Time Digital Display
Couldn't load pickup availability
Sentry AirGuard
90-day money-back guarantee
90-day money-back guarantee
At Peakflex, we’re confident that our products can help to protect yourself and your family. That’s why we offer a risk-free 90-day money-back guarantee, which begins only after you receive the product. If, for any reason, you’re not satisfied, please contact us at info@trypeakflex.com and we’ll be happy to assist you!
Shipping
Shipping
The average delivery time is about 6–12 days. It takes us about 1–3 business days to process your order.
You will receive a tracking number as soon as we have shipped your order.
Every Breath Counts While You Sleep...
Most People Don't Recognize The Warning Signs
Carbon Monoxide Doesn't Smell.
Doesn't Leave Smoke.
Doesn't Give You A Warning.
Every year, thousands of families unknowingly breathe carbon monoxide produced by perfectly ordinary appliances.
A furnace.
A gas water heater.
A fireplace.
A generator during a blackout.
Even a car left running in an attached garage for only a few minutes.
The most dangerous part?
Carbon monoxide often builds gradually. You can't see it. You can't smell it. And many people mistake the early symptoms — headaches, dizziness or fatigue — for being tired or sick.
By the time you realize what's happening, dangerous exposure may already have occurred.
Why Carbon Monoxide Builds Inside Homes
Carbon monoxide isn't created by defective homes.
It's created whenever fuel burns without complete combustion.
That means common household equipment like:
- Gas furnaces
- Water heaters
- Fireplaces
- Boilers
- Gas ranges
- Portable generators
- Vehicles in attached garages
can all become potential CO sources if combustion or ventilation isn't working properly.
Modern homes are also better insulated than ever before.
While that's great for energy efficiency, it also means contaminated air can remain trapped indoors longer instead of naturally escaping.
Why Many Alarms May Alert Later
Traditional household CO alarms are primarily designed to sound when carbon monoxide reaches specific concentrations for defined periods.
Sentry AirGuard takes a different approach.
Instead of only functioning as a basic alarm, it continuously displays live carbon monoxide readings, allowing you to observe changing conditions before concentrations become much higher.
That gives you more information—not just an alarm.
Because understanding what's happening inside your home matters.
Introducing Sentry AirGuard
More Than A CO Alarm.
Know What's In Your Air.
Sentry AirGuard combines five essential safety monitors into one compact portable device.
It continuously monitors:
- Carbon Monoxide
- Combustible Gas
- Smoke
- Temperature
- Humidity
Everything is displayed in real time on an easy-to-read color display.
Whether you're at home, traveling, camping or staying in a rental property, you always know what's happening in the air around you.
Peace Of Mind Starts With Better Awareness
Know Sooner
Alerts beginning from 50 PPM rather than waiting for much higher concentrations.
Place It Where Risk Exists
Portable design lets you monitor areas where CO is most likely to appear.
Easy To Read
Large digital display shows carbon monoxide concentration clearly.
Ready In Seconds
No complicated installation.
Simply place it where you want to monitor.
Take It Anywhere
Perfect for travel, cabins, RVs, boats, hotels, or temporary accommodation.
Help Protect The People Who Matter Most
Children.
Parents.
Grandparents.
Guests.
Everyone depends on the air inside your home.
5-in-1 Protection
Carbon Monoxide
Monitor live CO concentration beginning at 50 PPM.
Combustible Gas
Helps identify potential gas leak conditions.
Smoke Detection
Additional layer of household safety.
Temperature
Monitor indoor temperature anytime.
Humidity
Keep track of moisture levels that affect indoor comfort.
How Sentry AirGuard Compares
| Sentry AirGuard | Standard CO Detector | |
|---|---|---|
Detects carbon monoxide |
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Alerts from just 50 PPM |
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Portable design |
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Real-time CO level display |
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5-in-1 monitoring |
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Suitable for home & travel |
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Fixed wall/ceiling installation |
WHAT OUR CUSTOMERS SAY
Thousands of customers already rely on Sentry AirGuard every day because it's designed to do more than simply sound an alarm. It continuously monitors carbon monoxide, while also tracking gas, smoke, temperature, and humidity in real time—helping you stay informed wherever you need protection most.
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★★★★★
Finally, peace of mind
I bought it for our RV and now take it everywhere we travel. I love being able to actually see the readings instead of wondering if everything is okay.
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★★★★★
Exactly what we needed
The display gives me much more confidence than our old ceiling alarm. Being able to see live CO readings instead of just waiting for an alarm makes a huge difference. We bought a second one for upstairs.
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★★★★★
Perfect for older homes
We keep one near our furnace during winter and another by the garage entrance. They're easy to move, easy to read, and give us much greater confidence that our home is protected.
Frequently Asked Questions
What makes Sentry AirGuard different?
What makes Sentry AirGuard different?
Unlike many traditional detectors that simply sound an alarm under alarm conditions, Sentry AirGuard continuously displays live carbon monoxide readings starting from 50 PPM, while also monitoring combustible gas, smoke, temperature, and humidity—all in one portable device.
Can I use Sentry AirGuard while traveling?
Can I use Sentry AirGuard while traveling?
Absolutely. Its compact, portable design makes it ideal for hotels, Airbnb stays, RVs, cabins, vacation homes, and boats. Simply pack it in your luggage and plug it in wherever you stay for added peace of mind.
Where should I place Sentry AirGuard?
Where should I place Sentry AirGuard?
For the most effective monitoring, place Sentry AirGuard near areas where carbon monoxide or combustible gases could potentially be present, such as near furnaces, water heaters, attached garage entrances, or other fuel-burning appliances. Always follow the placement recommendations in the user manual.
What does the display show?
What does the display show?
The color display provides real-time information including:
- Carbon Monoxide (CO)
- Combustible Gas
- Smoke Detection Status
- Temperature
- Humidity
- Battery Status
This allows you to monitor your indoor environment at a glance.
Is Sentry AirGuard difficult to set up?
Is Sentry AirGuard difficult to set up?
Not at all. Simply plug it into a compatible outlet, power it on, and it's ready to begin monitoring. The intuitive display and simple controls make it easy to use right out of the box.
Does it replace my existing smoke or carbon monoxide alarm?
Does it replace my existing smoke or carbon monoxide alarm?
Sentry AirGuard is designed to provide additional monitoring and greater awareness through its portable 5-in-1 functionality. Always follow your local building codes and safety regulations regarding required smoke and carbon monoxide alarms.
Is there a money-back guarantee if the Sentry AirGuard doesn't work?
Is there a money-back guarantee if the Sentry AirGuard doesn't work?
We offer a satisfaction guarantee! If you are not satisfied with the Sentry AirGuard, please contact us at info@peakflex.com for a return and refund within 90 days.
The period begins upon receipt of the product. It is important to us to support you as best as possible in your daily life.
Try the Sentry AirGuard now for 90 days without any risk
Our promise to you:
We believe everyone deserves greater peace of mind in their home and while traveling. That's why every Sentry AirGuard comes with a risk-free 90-day money-back guarantee. If you're not completely satisfied for any reason, simply return it within 90 days for a full refund.
In other words: You only keep Sentry AirGuard if you're 100% confident it gives you the peace of mind and protection you were looking for.