Testo 0636 9775 Temperature/Humidity Digital Probe to 180 °C

For measuring relative humidity, air temperature, absolute humidity, wet bulb temperature, and dew point. You can use the probe in dusty atmospheres, at high air velocity and under mechanical stress. Measuring range: temperature (-4° to 356 °F), humidity (0 to 100 %rH). Compatible with testo 400 and testo 440.