Know What Your Family Is Breathing. Every Hour. Every Day.
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.
NOT AVAILABLE ON AMAZON OR EBAY
"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."
— Lisa M., 38, Ohio
Know What Your Family Is Breathing. Every Hour. Every Day.
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The Silent Killer Nobody Warned You About
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.
Every Breath Counts. One-Time Tests Guess. Steadfast Clarity Knows.
Introducing: The Steadfast Clarity Continuous Radon Monitor
Introducing: The Steadfast Clarity Continuous Radon Monitor
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.
Developed With Environmental Professionals Who Saw The Same Story Repeat Itself
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.
Meet The Families Who Stopped Guessing And Started Knowing
Over 100,000+ Homes Protected
Kevin R.
Verified Buyer
"The Charcoal Test Said We Were Fine. We Weren't."
"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."
Margaret T.
Verified Buyer
"My Husband Never Smoked. He's Gone."
"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."
James P.
Verified Buyer
"My Neighbor Is An Environmental Inspector. He Showed Me His. I Ordered Immediately."
"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."
Protect Your Family. Get Your Steadfast Clarity Today.
CHOOSE FOR YOUR HOME:
sTARTER kIT
1-Pack
$99.00
Per Detector
Total:
$180
$99
LIFETIME GUARANTEE
Full HOME COVERAGE
2-Pack
$89.50
Per Detector
Total:
$360
$179
LIFETIME GUARANTEE
FREE SHIPPING
FREE RADON
SAFETY GUIDE
Your home + Parent's home
3-Pack
$83.00
Per Detector
Total:
$540
$249
LIFETIME GUARANTEE
FREE SHIPPING
FREE RADON
SAFETY GUIDE
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Your Purchase Is Protected By Our
90-Day "Sleep In Peace" Guarantee
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.
90 Day Money
Back Guarantee
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
Real, Verified Results:
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.
Sarah D.
Verified Customer
Reviewing
Steadfast Clarity©
I recommend this product
1 day ago
"My Mom Never Smoked. Died At 61 From Lung Cancer."
"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."
Robert K.
Verified Customer
Reviewing
Steadfast Clarity©
I recommend this product
1 day ago
"I Bought 4 — One For Each Of My Kids' Homes"
"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."
Patricia M.
Verified Customer
Reviewing
Steadfast Clarity©
I recommend this product
4 days ago
"My Daughter Said I Was Overthinking It. Then She Saw The Number."
"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."
Tom H.
Verified Customer
Reviewing
Steadfast Clarity©
I recommend this product
9 days ago
"No App. No Fuss. Just The Number. That's All I Needed."
"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."
Linda R.
Verified Customer
Reviewing
Steadfast Clarity©
I recommend this product
22 day ago
"I'm 71 And I Did It Myself"
"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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Questions from Homeowners
How is Clarity Steadfast different from my charcoal test kit?
A charcoal test kit tells you what radon was doing during one specific week — often years ago. Radon fluctuates constantly with seasons, weather, and ground pressure. A home that reads 1.8 pCi/ L in summer can read 14+ pCi/L in winter. Clarity Steadfast monitors continuously, updating every hour, so you always know what's actually in your home right now — not what was there years ago when conditions were completely different.
Does the level change over time or is one test enough?
Radon levels change constantly. One test is never enough. Continuous monitoring is the only way to actually know what your family is breathing year-round. That's exactly what Clarity Steadfast does — 24 hours a day, every single day, automatically.
Does it need WiFi or an app?
No. Clarity Steadfast has a live digital display that shows you the reading directly on the device. No app required. No WiFi. No phone. No calibration nightmares. It just works — every single hour whether you check it or not. When you walk past it in the morning you see the number. That's it.
What level is dangerous?
The EPA action level is 4 pCi/L — but this was set in 1976 as an economically feasible threshold, not a health-based safe level. The EPA and WHO both state that no safe level of radon exists. At 4 pCi/L, 600,000 radioactive disintegrations are occurring in your lungs every hour. Clarity Steadfast alerts you the moment levels rise to dangerous territory — not after hours or days of exposure.
Where should I place it?
Start with the basement or lowest livable level of your home — this is where radon concentrates first. If you have a ground floor bedroom or a child's room on the first floor, place a second unit there. Most families are fully covered with a 2-pack.
How many do I need?
One for the basement or lowest level. One for the main living and sleeping floor. Most families need a 2-pack. Larger homes or homes where children sleep in basement-adjacent rooms should consider a 4-pack.
Is it hard to install?
No. Plug it into any wall outlet. That's it. 30 seconds. No ladder. No tools. No contractor.
What if it shows a high reading?
Don't panic. Radon is completely fixable. A standard mitigation system — a hole in the slab, a PVC pipe, and a small fan — reduces radon by 80-99% and typically costs $800-2,500. Most installations take 2-3 hours. Thousands of families bring their levels from 20+ pCi/L down to under 1 pCi/L. Knowing is the first step. Steadfast Clarity gives you that.
Can radon be fixed permanently or is it ongoing?
A properly installed mitigation system permanently reduces radon by 80-99%. But you still need continuous monitoring because systems can fail, fans can stop, and conditions can change. Steadfast Clarity is your permanent watchdog — making sure your mitigation system keeps working and your levels stay safe year after year.
What if it doesn't work for me?
You're covered by our 90-Day Sleep In Peace Guarantee. If you're not satisfied for any reason we'll refund every penny. No questions asked. Plus the Lifetime Guarantee means we replace it free if anything ever goes wrong.
How fast will I receive it?
Ships from US warehouse. 3-5 business days typically.
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