With the Wagner Meters Rapid RH^® 4.0 EX, you get accuracy and peace of mind.

Section 8 of ASTM F2170, “Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs using in situ Probes” provides clear guidelines for the requirements of RH readings on a project site and verifiable calibration for all sensors.
Each Smart Sensor comes with a NIST-traceable certificate of calibration. The CMOS Sens^® technology insures the Smart Sensors’ accuracy and rapid equilibration.

And since the Smart Sensor remains in the concrete at each job site, once it is equilibrated no further equilibration time is necessary. Readings can be taken as often as needed.

The Rapid RH^® 4.0 EX Smart Sensor is not taken in and out of the hole or unnecessarily handled so calibration checks are not necessary. Once in the test hole, the very nature of the Rapid RH^® 4.0 EX design and method with certifiably-calibrated (NIST) Smart Sensors means that calibration concerns, traceability and the associated certified documentation come built in with each Rapid RH^® 4.0 EX test.

If a flooring failure occurs, calibration concerns, traceability and the associated certified documentation are in your hands and your compliance is assured.