A Complete Kit measures Moisture content, Relative Humidity, Temperature and Dew Point in concrete and gypsum flooring. Contains a CRH Moisture and Humidity Meter with Software and PC Cable, Two Relative Humidity Probes, RH Probe Calibration Check Solution with Sleeve, Pack of twelve RH Sleeves, and optional instant read Infrared Surface Thermometer. Use to perform ASTM F2170 and ASTM F2420.