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.

aw value set: pressure-tight precision humidity probe with certificate, measurement chamber and 5 sample bowls (plastic)

aw value set: pressure-tight precision humidity probe with c...

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Measuring range	−20 to +70 °C
Accuracy	±0,4 °C (−10 to +50 °C) ±0,5 °C (Remaining Range)

Measuring range	0 to +1 0 to +100 %RH
Accuracy	±0,02 (+0,9 to +1 ) ±2 %RH (0 to +10 %RH) ±0,01 (+0,1 to +0,9 ) ±2 %RH (+90 to +100 %RH) ±1 %RH (+10 to +90 %RH)

aw value set: pressure-tight precision humidity probe with c...

aw value set: pressure-tight precision humidity probe with c...

Temperature - NTC

Humidity - Capacitive