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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Temperature - NTC	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

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

General technical data	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

Temperature - NTC

Humidity - Capacitive

Humidity - Capacitive

General technical data

General technical data