The Triplett RHT37 Digital Psychrometer with Type K measures air temperature, relative humidity, wet bulb, dew point, and Type K Temperature and is ideal for building inspection, water restoration, greenhouses, warehouses, museums, libraries, offices, and storage areas. The RHT37 can simultaneously displays air temperature, humidity and wet bulb or dew point or Type K temperature plus time. The RHT37 features dual Type K Temperature inputs for superheat and cooling applications as well as T1-T2 (Type K), Air Temperature - T1, and T1-Dew Point differential temperature measurement. The RHT37 turnable cap closes to protect the sensor during storage or travel, min/max/average recalls highest, lowest readings with date and time stamp plus average readings. The RHT37's data hold freezes the display for easy viewing, and auto power off with disable to conserve battery life. 1 year warranty.