Extech RH490-NIST Psychrometer, 199°F Max, ±1.8 °F Accuracy, Backlit LCD Display, Battery-Powered

The FLIR Precision Hygro-Thermometer is a reliable handheld instrument that measures relative humidity, dew point, wet bulb, temperature, and water vapor levels with high accuracy.

It has Less than 30 seconds of RH response time for quick results
Data Hold and Min/Max functions for capturing fluctuating measurements
High accuracy with ±2% Relative Humidity and ±1.8°F/1°C Temperature
Includes carrying case and 9V battery for convenience