The DTH35 Digital Psychrometer with Enthalpy allows technicians to measure temperature and relative humidity, and calculates wet bulb, dew point, and enthalpy values. The design makes in-duct measurement possible with the 4-inch-long probe while the magnetic mount allows for hands-free measurement on grilles or other metal surfaces. The unit includes a large backlit display, with hold, minimum/maximum functions, and a one-year limited warranty.