The DTH35 Digital Psychrometer measures temperature, relative humidity and calculates wet bulb, dew point and enthalpy of moist air (air with humidity). The housing design is useful for in-duct measurement, as well as ambient or vent outlet applications.From the ManufacturerUEi Test Instruments has over 50 years experience designing and manufacturing a broad range of award-winning, industry-leading Test and Measurement Tools. Professionals recognize the UEi brand for quality and innovative features designed to solve real-world problems. UEi backs its products with dedicated technical support, service and repair teams.