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 

Temperature - NTC	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

Humidity - Capacitive	Measuring range 0 to +100 %RH
Humidity - Capacitive	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)

General technical data	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

Temperature - NTC

Humidity - Capacitive

Humidity - Capacitive

General technical data

General technical data