Extech RH390 Psychrometer, 199°F Max, ±1.8 °F Accuracy, Backlit LCD Display, Battery-Powered

The FLIR Precision Psychrometer is a high-quality device that offers the highest 2% RH accuracy with a quick less than 30-second RH response time. Its slim design with rubberized sides ensures a better grip for one-handed operation. The dual backlit display allows for simultaneous display of humidity/temperature, humidity/dew point, and humidity/wet bulb.

Data hold and min/max functions for convenience
Quick less than 30-second RH response time
Auto power off with disable and low battery indicator for power saving