You can keep a close eye on indoor air quality with the testo 445 climate measuring instrument: the allrounder can measure up to 6 parameters (with the appropriate probe), which can help you make a professional assessment of indoor air quality. The climate measuring instrument therefore supports you in adjusting and checking ventilation and air conditioning systems.

The testo 645 humidity/temperature measuring instrument automatically indicates the measurement parameters of relative humidity, absolute humidity, dew point, degree of humidity, enthalpy and temperature at the touch of a button.

High humidity level probe w/ heated sensor element, no humidity on sensor

High humidity level probe w/ heated sensor element, no humid...

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Measuring range	-20 to +85 °C
Accuracy	±0.4 °C (-10 to +50 °C) ±0.5 °C (-20 to -10.1 °C) ±0.5 °C (+50.1 to +100 °C)
Reaction time	30 s

Measuring range	0 to +100 %RH
Accuracy	±2.5 %RH (0 to +100 %RH)

Length probe shaft	300 mm
Diameter probe shaft	12 mm

High humidity level probe w/ heated sensor element, no humid...

High humidity level probe w/ heated sensor element, no humid...

Temperature - NTC

Humidity - Capacitive

General technical data