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.

Standard pressure dewpoint probe for measurements in compressed air systems

Standard pressure dewpoint probe for measurements in compres...

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HQ instrument 

Measuring range	−20 to +50 °Ctpd
Accuracy	±1 °Ctpd (0 to +4,9 °Ctpd) ±3 °Ctpd (−10 to −5,1 °Ctpd) ±0,9 °Ctpd (+5 to +50 °Ctpd) ±2 °Ctpd (−5 to −0,1 °Ctpd) ±4 °Ctpd (−20 to −10,1 °Ctpd)

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Standard pressure dewpoint probe for measurements in compres...

Standard pressure dewpoint probe for measurements in compres...

Humidity - Capacitive

Pressure dewpoint

General technical data

Measuring range	0 to +100 %RH

Length probe shaft	300 mm