The #1 Trusted Concrete Moisture Test
3 Ways to RH Test:

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3 Ways to Test RH:

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Rapid RH L6 Family

Maximize Your Freedom with Simple Concrete Moisture Testing

Total Reader
Quickly reads concrete moisture, temperature, and relative humidity
C555 Concrete
Moisture Meter

This pinless concrete moisture meter measures concrete, brick, and gypsum, allowing you to easily identify wet spots or potential problem areas.
Rapid RH L6 Datagrabber
with Bluetooth®

An optional accessory to automate your readings, saving time and effort
The Total Reader and L6 Smart Sensors are included in our Starter Kit, which gives you everything you need for accurate and reliable test results.
L6 Smart Sensors
Highly accurate relative humidity sensor that takes and stores your readings
True Remote Monitoring™ System
View real-time jobsite conditions 24/7 365 days a year — from anywhere in the world
DataMaster™ L6 App
Easy-to-use app for storing and reporting your data

(Click images to learn more)

Rapid RH L6 Family

Maximize Your Freedom with Simple Concrete Moisture Testing

The Total Reader and L6 Smart Sensors are included in our Starter Kit, which gives you everything you need for accurate and reliable test results.

Total Reader

Quickly reads concrete moisture, temperature, and relative humidity

More Info ▼

L6 Smart Sensors

Highly accurate relative humidity sensor that takes and stores your readings

More Info ▼

Rapid RH L6 DataGrabber
with Bluetooth®

An optional accessory to automate your readings, saving time and effort

More Info ▼

DataMaster™ L6 App

Easy-to-use app for storing and reporting your data

More Info ▼

C555 Concrete Moisture Meter

This pinless concrete moisture meter measures concrete, brick, and gypsum, allowing you to easily identify wet spots or potential problem areas.

More Info ▼

True Remote Monitoring™ System

View real-time jobsite conditions 24/7 365 days a year — from anywhere in the world

More Info ▼

How to Get Started

Choose Your Test Method

  • Hands-On Monitoring
  • Automatic On-Site Monitoring
  • True Remote Monitoring
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3 Easy Ways to BUY

  • Check out online for convenient, fast, and free shipping
  • Order toll-free over the phone
  • Find a local Rapid RH distributor

Enjoy Unparalleled Support

And remember to download the complimentary app that’s designed for your system

Wagner Meters’ dedicated team of moisture experts are committed to assisting Rapid RH users in maximizing their product’s full potential.

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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  rapid rh l6 overview

Rapid RH® L6 Vs. 5.0 Explained

Rapid RH L6 System

Rapid RH® L6—Single Usage

The system that revolutionized concrete moisture testing
  • Easy ASTM F2170 compliance
  • Accurate and reliable as well as the fastest method in the industry
  • Ideal for most flooring installers and other professional contractors
  • No need for sensor calibration -- ever
  • 24-hour ambient temperature and relative humidity recording at the job site

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Rapid RH 5 Reusable System

Rapid RH® 5.0—Reusable

Transforming reusable sensors
  • Ideal for inspectors, lab personnel, and other high volume professions
  • Accurate, reliable, and the fastest ASTM-compliant test method in the industry
  • Accomplish the required EasyCare CalCheck® calibration verification status easily and quickly
  • Includes the Smart Logger ambient temperature and relative humidity recorder

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We Don’t Just Care About Concrete Moisture Testing, We Care About Your Success

  • Our customer service & support is unmatched
  • We answer your questions that our competitors won’t
  • We provide free education through videos, webinars, demonstrations, and articles


Byran Vigue
Wagner’s also got great customer service. They get right on it when it comes to answering questions or addressing concerns, but they also call to check in on us to see if we need anything or if they can offer any help.


Byran Vigue
Wagner’s also got great customer service. They get right on it when it comes to answering questions or addressing concerns, but they also call to check in on us to see if we need anything or if they can offer any help.


J.K. Nixon | Concrete Restoration Services, LLC
Trusted to Work Every Time
My job is to provide professional, thorough, accurate, impartial testing services. My obligation is to use what works - and Wagner [Rapid] RH® flat out works. And I trust them to work every time.


David Harris | President and CEO, Riverbed Concrete, LLC
Saves Us Time, Money, and Effort
The Rapid RH® is inexpensive, quick and easy to use, and enables us to do calibration checks required for ASTM F2170 compliance in seconds rather than hours. And because it gives us quick, accurate results, we can address a potential problem quickly. Or, if there’s no problem, we can get back to the install without further delay. This saves us time, money, and effort.

Enhance the Effectiveness of Your Concrete RH Testing with the C555 Concrete Moisture Meter

The C555 Concrete Moisture Meter assists with optimal placement of ASTM F2170 concrete slab RH test probes by enabling preliminary “Wet/Dry” readings to help with detection of moisture pockets. It’s also a helpful tool for anyone wanting to perform concrete surface moisture testing.

The C555 Concrete Moisture Meter supports the most effective placement of Rapid RH L6 Smart Sensors according to the processes outlined in ASTM F2659. Also, the built-in temperature and relative humidity sensor will give you ambient readings to assist with your ASTM F2170 reporting. Using the C555 as a qualitative measurement device, you can also get an instant indication of moisture intrusion within materials such as brick, concrete, and gypsum.

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Frequently Asked Questions

⊕  When should you use a concrete meter?
⊕  Why RH testing?
⊕  Why choose the L6?
⊕  Why choose the C555?