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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HQ instrument 

Measuring range	−20 to +180 °C
Accuracy	±0,4 °C (+0,1 to +50 °C) ±0,5 °C (+50,1 to +180 °C) ±0,5 °C (−20 to 0 °C)
Reaction time	30 s

Measuring range	0 to +100 %RH
Accuracy	long-term stability: ±1 %RH / year *The sensor accuracy corresponds to the system accuracy. ±0,03 %RH/K (k=1) ±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

kompetenca@optimum

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