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.

Flexible humidity probe (does not retain shape) for measurements in inaccessible places

Flexible humidity probe (does not retain shape) for measurem...

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Measuring range	-20 to +180 °C
Accuracy	±0.4 °C (+0.1 to +50 °C) ±0.5 °C (-20 to 0 °C) ±0.5 °C (+50.1 to +180 °C)
Reaction time	30 s

Measuring range	0 to +100 %RH
Accuracy	long-term stability: ±1 %RH / year ±0.03 %RH/K (k=1) *The sensor accuracy corresponds to the system accuracy. ±2 %RH at +25 °C (+2 to +98 %RH)

Length probe shaft tip	100 mm
Diameter probe shaft tip	12 mm
Length probe shaft	1,500 mm

Flexible humidity probe (does not retain shape) for measurem...

Flexible humidity probe (does not retain shape) for measurem...

Temperature - NTC

Humidity - Capacitive

General technical data