Extech 445580-NIST Pen Digital Thermohygrometer, ±5 % Accuracy, +122°F Max, 90%RH Max

The FLIR digital hygro-thermometer is a compact and ideal for field use. With a dual LCD display for temperature, humidity, and advanced function indication, this device is perfect for measuring temperature and relative humidity simultaneously.

Measures temperature (°C/°F) and relative humidity simultaneously
Built-in self calibration utility with optional RH calibration bottles
Max/min memory functions for temperature and relative humidity
Data hold for freezing the LCD display status
Complete with pocket clip and 3V lithium battery
33% and 75% RH calibration references included