The convenient Extech EN510 is a 10-in-1 environmental meter that can measure air velocity, air flow, air temperature, Type-K temperature, heat index, and humidity. It also offers wet bulb, dew point, windchill, and light level measurements. The EN510 includes a built-in, replaceable low friction ball bearing mini vane wheel, a precision photo diode with cosine and color correction filter, and a capacitive humidity sensor for high accuracy. The Type-K input accepts standard Type K Thermocouple probes to measure surface temperature up to 1300°C (2372°F). The large dual LCD display is backlit for easy use in dimly lit areas, and auto power off (with disable) helps save the battery.