Psychrometer with Infrared Thermometer With Infrared Thermometer 0 to 100 Percent Relative Humidity Range +/-2 Percent Humidity Accuracy Air 14 Degrees to 140 Degrees F Probe -148 to 2501 Temp Range (F) +/-4 Degrees Temp Accuracy (F) -6.88 Degrees to 140 Degrees F Wet Bulb Temperature Range -90.4 Degrees to 140 Degrees F/-68 Degrees to 60 Degrees C Dew Point Range Sensor Type Capacitance Thermistor Display 9999 Count Dual LCD Battery Type 9V Auto Power Off Yes Data Hold Yes