The Delmhorst HT-4000F stand-alone digital thermo-hygrometer for flooring installers and inspectors has the same fast acclimating RH/T sensor found in the TotalCheck 3-in-1 moisture meter. It is for flooring contractors who prefer having separate meters, instead of one combination meter. The HT-4000F sensor is also detachable, making it ideal for testing concrete slab (according to the ASTM F2170 standard).