Rapid RH® 4.0 EX Was Designed for F2170-11 Standard

In this video, Jason Spangler introduces the new ASTM F2170-11 compliant Rapid RH® 4.0 EX. Jason walks you through the changes made to the Smart Sensor and why those changes were made.

The Rapid RH® 4.0 EX includes extensions that allow you adhere to the latest ASTM F2170 standard, F2170-11. The 4.0 EX extensions provide the flexibility and convenience of being able to take accurate relative humidity (RH) readings in a concrete slab of almost any thickness.

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Last updated on August 31st, 2021


  1. Jason says:

    Is versa shield required on a new slab that has a vapor barrier in place under slab?

    • Jason Spangler says:

      Thanks for the question. If the slab is adequately dry enough, as measured with a relative humidity device in the concrete, to accept the flooring system, as specified by the flooring manufacturer, then it wouldn’t be required.



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