Hygro-Thermometer Pen with Dew Point and Wetbulb - (RHT05)The Triplett Model RHT05 Hygro Thermometer Pen measures Air Temperature, Relative Humidity, Wet Bulb, and Dew Point and is ideal for field applications including building inspection, water restoration, greenhouses, warehouses, museums, libraries, offices, and storage areas. Read More > DESCRIPTION The Triplett Model RHT05 Hygro Thermometer Pen measures Air Temperature, Relative Humidity, Wet Bulb, and Dew Point and is ideal for field applications