Steadfast Clarity is a continuous radon monitor that shows you live radon levels in real time — so you know exactly what your family is breathing, not what a charcoal test showed years ago.
Live Digital Display — See your actual pCi/L reading every time you walk past it. No app. No phone. No WiFi needed.
Plug & Protect — No drilling, no tools, no contractor. Plugs into any wall outlet in 30 seconds.
Continuous Protection — Updated every hour, 24 hours a day. Not a one-time snapshot from years ago.
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"I tested once when we bought the house. Came back fine. Filed it away. Never thought about it again. Five years later my neighbor Tom — an environmental inspector — came over and showed me his Clarity Steadfast. First reading in our home: 14.2 pCi/L. In my daughters' bedroom. Five years. I had no idea. I check that display every single morning now. 0.6 pCi/L. That number is everything to me."
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Radon is the number one cause of lung cancer in non-smokers in America.
21,000 Americans die from it every year.
More than drunk driving.
More than house fires.
More than carbon monoxide.
It seeps silently from the ground beneath your house through every crack in the slab, every gap around a pipe, every open sump pit.
It has no smell. No color. No taste.
It causes no symptoms for years. Sometimes decades.
The damage it causes is cellular — radioactive particles depositing into the lining of your family's lungs, breaking DNA strands, building silently while your family goes about their lives completely unaware.
At 4 pCi/L — the EPA action level — 600,000 radioactive disintegrations are happening in your lungs every single hour.
And 1 in 15 American homes is above that level.
In Iowa it's 70% of homes.
In Pennsylvania it's 40%.
Most of them have never been properly monitored.
Most of those families think they're fine.
Because they did a one-time charcoal test years ago.
And it came back low.
And they filed it away and never thought about it again.
Just like you probably did.
Steadfast Clarity is a professional-grade continuous radon monitor designed to show you live pCi/L readings — so you know exactly what your family is breathing every single hour of every single day.
It's simple enough for anyone to use — plugs into any wall outlet in 30 seconds with no tools, no drilling, no contractor.
Because radon doesn't give you warnings.
Steadfast Clarity does.
Healthy non-smokers. Lung cancer diagnoses. Houses tested after. Off the charts.
Families who did a charcoal test when they bought their house. Filed it away. Never thought about it again.
Steadfast Clarity was built for every family that deserves to know — not guess — what they're breathing.
✓ FCC Certified — Meets all US federal electronic device standards
✓ ETL Listed — Independently tested and verified for safety and accuracy
✓ AARST-NRPP Recognized Standards — Built to the same measurement standards used by professional radon inspectors
✓ EPA-Recognized Testing Protocol — Continuous hourly monitoring meets EPA recommended measurement approach
Like having an environmental inspector in your home — watching the air so you don't have to.
Over 100,000+ Homes Protected
"We tested when we bought the house four years ago. 1.4 pCi/L. Filed it away. Bought Steadfast Clarity on a whim after a friend mentioned radon. First reading: 16 pCi/L in the basement. My son's bedroom is directly above it. 14 pCi/L up there. Four years. The charcoal test told us nothing about what was actually happening. Get the monitor."
"My husband died at 57 from lung cancer. Never smoked a day in his life. We tested the house after. 22 pCi/L. We had done a charcoal test twelve years earlier. It came back fine. That test meant nothing. I bought Clarity Steadfast for my daughter's new home the week she moved in. Nobody should find out the way we did."
"Tom came over with his Clarity Steadfast just to show me. 11 pCi/L in my living room. 14 in the basement. Our charcoal test from when we bought the house was 1.9. That was six years ago. Six years. Get continuous monitoring. The one-time test is not enough."
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Here at Clarity Steadfast, we make sure our customers finally know — not guess — that their family is safe. Or we refund 100% of their investment.
Some families feel it the first morning they check the display. Some take a week to stop thinking about that old charcoal test. Everyone's different. So the best thing you can do is give it a try — and if you don't feel safer, calmer, and finally certain your family is protected, you have 90 days to claim a full refund. No questions asked
See Why Families Are Replacing Their One-Time Tests And Calling Steadfast Clarity "The Best Decision We Ever Made"
Note: All reviews below are from actual paying customers. Authenticated and verified.
"After she passed we tested her house with continuous monitoring. Her basement home office averaged 24 pCi/L. She worked down there every day for fifteen years. A charcoal test years ago said she was fine. I bought Clarity Steadfast for every family member I have. Please don't let this be your family's story."
"I kept one for myself and sent one to each of my adult children when they bought their houses. I can't think of a better gift. It says I love you and I want you to actually know you're safe. I hope they never see a high reading. But if they do, Clarity will catch it."
"My daughter said I was being paranoid when I told her to test her basement. She'd done the charcoal test when she moved in. Said it was fine. I bought her a Steadfast Clarity anyway. First reading: 18 pCi/L. Her kids sleep in the room directly above the basement. She called me crying. Now she checks it every morning."
"I tried an Airthings first. Spent two weeks obsessing over the app, the fluctuations, the alerts on my phone at 2 AM. Drove me insane. Switched to Clarity Steadfast. I walk past it every morning. I see the number. I go about my day. That's it. Exactly what I needed."
"I am 71 years old and I plugged this in by myself in about 30 seconds. No ladder. No tools. No calling my son to help. I look at that display every morning. 0.8 pCi/L. I don't have to wonder anymore. I know. That's worth everything to me."
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Everything you need to know about radon monitoring and Clarity Steadfast.
