Wagner Rapid RH L6 Smart Concrete Sensor - 5 PackThe Rapid RH L6 Smart Concrete Sensors are factory calibrated using CMOSens® technology to ensure accurate readings. Each Smart Sensor pack comes with a NIST-traceable calibration certificate and comes in tamper-resistant packaging to ensure perfectly calibrated, genuine Wagner Smart Sensors. ASTM F2170 for concrete requires that contractors place three concrete moisture tests for the first 1,000 square feet of the flooring area, and an additional sensor for each subsequent 1,000 square feet of the concrete area. So, for example, a 10,000 square foot warehouse slab would require 12 in situ probes to be installed (3 for the first 1,000 square feet, then 9 extras for every 1,000 square feet of the remaining 9,000 square feet). The Rapid RH L6 Smart Concrete Sensors (5) Value Pack includes:5 ea. L6 Smart Concrete Sensors 10 ea. Extensions5 ea. Protective Caps w/Rubber Plugs & a Butyl Gasket5 ea. Stainless Steel CoversCertificate of CalibrationFloor Map Imbotec Group Rapid RH L6.0 BrochureImbotec Group Rapid RH L6.0 Manual Rapid RH® L6 concrete sensors feature a customized version of the SHT35 humidity sensor from Sensirion that has a +/-2% accuracy tolerance at 50% to 90% relative humidity (RH). This important aspect of the L6 concrete RH testing system puts it in direct compliance with ASTM F2170. Standard SHT35 humidity sensors, found in other concrete RH test systems, start to deviate from the +/-2% tolerance at RH levels as low as 50%.