Magnetic Digital Pocket Thermometer for HVAC Temperature Measurement The Klein Tools ET10 Magnetic Digital Pocket Thermometer is designed for HVAC professionals and electrical distributors needing precise ambient and direct-contact temperature readings. This rugged, portable digital thermometer features a magnetic base for hands-free attachment to air vents, providing practical and efficient temperature measurement in Fahrenheit and Celsius scales. Its compact design with a pocket clip ensures easy storage and quick access, making it suitable for field service applications involving wire and cable, lighting solutions, and switchgear inspection. Specifications Measurement Range: -40°F to 572°F (-40°C to 300°C) Resolution: 0.1°F/°C Temperature Stability: 3 seconds Operating Temperature: 32°F to 122°F (0°C to 50°C) Storage Temperature: -4°F to 140°F (-20°C to 60°C) Operating Altitude: 6562 ft. (2000 m) Relative Humidity: Operating 10% to 90% non-condensing; Storage