• Easiest to Comply
    with ASTM F2170
  • 10 Times FASTER
  • Lowest Cost/Test
  • Simplest to Use

It's TIME to
Celebrate!

Do you have a minute? Well, we're giving you 48 hours! That's right. ASTM International has published a change in the F2170 standard for in situ relative humidity testing that decreases the test period from 72 hours to 24 hours. That's a savings of 48 hours that we think will give you cause to celebrate! Learn More
Rapid RH® 4.0 EX Rapid RH® 5.0
Talk to a concrete moisture testing expert, call us worldwide toll-free: 1-800-634-9961

Why Relative
Humidity Testing?

For successful flooring projects, it is crucial to measure moisture below the surface of the concrete slab. Other tests are surface-based and do not give reliable results. For example, the anhydrous calcium chloride test measures only the moisture vapor emission rate coming from the slab’s surface. It tells you nothing about the moisture condition deeper in the slab. Only the in situ relative humidity (RH) test is scientifically proven for accuracy and reliability.
Learn More

3 Easy Steps to Successful RH Testing

Learn even more to ensure fast, accurate moisture test results that you and your clients can rely on.

It's easy! Here are the 3 steps you can take right away
to learn how to do RH testing.

Watch the Installation Video

Learn how to perform a Rapid RH® moisture test quickly and easily—watch our installation video.

Free Moisture Testing Webinar

Sign up for our free webinar, hosted by Howard Kanare, a leading expert in concrete moisture issues.

Use These Great Resources

Check out our comprehensive online resource library, chock-full of useful videos, articles, and mobile apps.

Buy What You Need Online at the Rapid RH® Store!

The Rapid RH® store has everything you need for fast, accurate RH testing. You can easily and conveniently order online or give us a call toll-free at 1-800-634-9961. We’re here to help Monday to Friday, 7:30 am to 4:00 pm Pacific Time.
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“The process behind the Rapid RH® is solid. We went to Rapid RH® because the accuracy is certified and it doesn’t need to acclimate past its initial point. We could stick [the sensor] in there, read it and trust it.”
– J.D. Grafton, CC Solutions