• Unparalleled accuracy even into the 90%-100% relative humidity range
• Advanced technology that provides relative humidity readings
• Improved Responsiveness in High RH

The Rapid RH product line is the fastest, most cost-effective, and simplest way to meet ASTM F2170, the standard for in situ relative humidity (RH) testing of concrete floor slabs.

Now, thanks to a recent update in the standard, the mandatory wait before obtaining official RH test results is only 24 hours, rather than 72 hours as required by other moisture tests.

This significant reduction in wait time allows you to take action on RH test results a full two days earlier than the ASTM F2170 standard previously allowed. Since time is money, this additional 48-hour time savings is something you can take to the bank. No other industry-accepted test method for concrete moisture offers such fast results, and certainly, none are more reliable or accurate than the RH test.

Take advantage of these sources to stay up to date with the best knowledge and practices.

The Rapid RH method is simple and quick. Just insert the Rapid RH into an installed L6 Smart Sensor and get reading instantly with Touch-n-Sense™ technology. On contact with any L6 Smart Sensor, the powers up takes a reading, and holds the reading for up to 1 minute after it is removed from the Smart Sensor, then powers down - all automatically!

The Rapid RH L6 concrete moisture testing system features advanced technology that provides relative humidity readings with unparalleled accuracy even into the 90%-100% relative humidity range.

When paperwork may not be the most reliable option, the Rapid RH L6 system and DataMaster™ L6 app lets you collect, transfer, store, and report concrete moisture readings with tamper-resistant technology that ensures data integrity from collection to distribution. Each Rapid RH L6 Smart Sensor is NIST*-traceable and comes with documentation to comply with ASTM F2170 requirements.

The calcium chloride test measures the moisture vapor emission rate coming from a concrete slab. However, 90% of moisture vapor emissions that a calcium chloride test sees comes only from the top half inch of the slab. Once a floor covering has been installed and drying has stopped, the slab will equilibrate and evenly distribute the moisture from top to bottom.

Calcium chloride is, therefore, only a surface test, highly affected by ambient conditions in the room or building. Even if done correctly, a calcium chloride test tells you nothing about what’s going on deeper in the slab.

As with calcium chloride tests, testing with concrete moisture meters is also surface-biased. At best, they only measure 3/4” into the depth of the concrete. In addition, concrete moisture meter accuracy is negatively affected by the density variability of the concrete as well as the varying chemical and aggregate composition.

There is no ASTM standard for using moisture meters as a final determination of whether a concrete slab is ready for a floor covering.

Moisture meters should NEVER be used to make the final determination as to whether or not a concrete slab is dry enough for a flooring installation.