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Radon Detectors and Test Kits: Types Compared and Top Picks

Updated November 2026 · Sources

A radon test is either a one-time kit sent to a lab or a digital monitor that shows readings at home. Here is how the main types compare, based on EPA and Health Canada guidance.

Types of radon detectors

TypeTest lengthHow you get resultsGood for
Charcoal canister (short-term kit)2 to 7 daysMail to the labA cheap first test, home sales
Alpha track (long-term kit)90 days to 1 yearMail to the labYour year-round average; Health Canada’s recommended 91-day test
Electret ion chamberShort- or long-termRead by a professional or labProfessional testing
Continuous radon monitor (professional)Usually 2+ days, hour-by-hour readingsReport from the testerHome sales, checking a system
Consumer digital monitorOngoingDisplay or appWatching trends over time after a lab test
Sources: U.S. EPA, A Citizen’s Guide to Radon; Health Canada, Guide for Radon Measurements in Residential Dwellings.

How to choose

  • Start with a lab-analyzed kit. Short-term charcoal kits are the cheapest way to check a home; long-term alpha track kits give the best annual average.
  • Use a certified device or tester for a home sale. Look for devices listed by the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB) in the U.S., or C-NRPP in Canada.
  • Digital monitors are useful for watching changes, for example after a mitigation system is installed, but confirm important decisions with a lab test or a certified professional.
  • Check free and low-cost state kits first; see your state page.

Popular radon test kits and monitors

Affiliate disclosure: as an Amazon Associate, Radon Levels Guide earns from qualifying purchases. This does not change our data or our advice: start with a lab-analyzed test, and use a certified professional for home sales.

These products are frequently recommended by independent reviewers. We have not tested them ourselves; the notes below summarize Bob Vila (updated January 2026) and SafeWise (updated April 2026).

Short-term lab kit (mail-in)

First Alert RD1 Radon Test Kit

Low-cost, 2- to 4-day test sent to a lab; Bob Vila’s “best bang for the buck” and SafeWise’s budget pick

Check price on Amazon
90+ days

Long-term lab kit (90 days or more)

Long-term alpha track test kit

Best estimate of your year-round average; the kind Health Canada recommends (at least 91 days)

See options on Amazon
1.8

Battery-powered digital detector

Airthings Corentium Home

Shows short- and long-term averages on the device; first reading after about 24 hours (SafeWise); Bob Vila’s best overall

Check price on Amazon
3.4 pCi/L

Plug-in continuous monitor

Ecosense RadonEye RD200

App and display; first reading in about 10 minutes (SafeWise); SafeWise’s best overall and Bob Vila’s best long-term pick

Check price on Amazon
RadonGood

Smart air quality and radon monitor

Airthings View Plus

Battery or USB power, results in the app and on the device; also tracks other indoor air measures

Check price on Amazon

Smart radon detector

Airthings Wave Plus

Battery-powered, results in the app; Bob Vila’s best smart pick

Check price on Amazon

Sources: Bob Vila, “The Best Radon Test Kits” (updated January 28, 2026); SafeWise, “Best Radon Detectors” (updated April 15, 2026). Prices change; check Amazon for the current price. Illustrations show the type of device and are not product photos.

Not sure which to buy? If you have never tested, a short-term lab kit is the cheapest start. If the result is 4 pCi/L or higher, follow up with a long-term test or a second short-term test, as the EPA recommends. A digital monitor is useful to watch levels after a mitigation system is installed.

What kits cost

  • Short-term kits: about $8 to $15 in Illinois county health departments and hardware stores (Shaw Local, January 2026) and about $20 to $30 in Pennsylvania (PA DEP, 2026).
  • University of Georgia program: air kits $15 online or $10 at some county Extension offices; water kits $30 (2024 fact sheet).
  • Minnesota: kits sold through the MDH-linked site for $12.95 (MDH, 2025).

Next: how to test for radon step by step and what your result means.

Frequently asked questions

Are digital radon detectors accurate?

Consumer monitors can show trends, but the EPA and state programs base decisions on lab-analyzed tests or certified professionals. Use a certified test before deciding to fix a home or during a sale.

Which radon test is most accurate?

A long-term test (more than 90 days) best reflects your year-round average. Health Canada recommends at least 91 days in the heating season.

How much does a radon detector cost?

Short-term lab kits commonly cost about $8 to $30 from state programs and stores; long-term kits and digital monitors cost more.

Sources