The testo 635-1 temperature and humidity measuring instrument enables you to measure the temperature, air humidity and dew point – in compressed air as well. State-of-the-art technology and a large selection of probes, which are available as an option, enable this wide variety of measuring possibilities.

The testo 635-2 temperature and moisture meter allows you to carry out temperature and moisture measurements on a variety of different materials, surfaces and environments. This is made possible due to leading-edge technology and a wide selection of optionally available sensors.

The U-value is the most important value for proving the heat loss of a building. With the testo 635-2 thermohygrometer and compatible accessories from the U-value set, determining the U-value is now easier than ever.

With our pressure dew point sensor in combination with a temperature measuring device, you can reliably monitor the pressure dew point in compressed air.

Pressure dewpoint probe for measurements in compressed air s...

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Measuring range	-20 to +50 °Ctpd
Accuracy	±3 °Ctpd (-10.0 to -5.1 °Ctpd) ±2 °Ctpd (-5.0 to -0.1 °Ctpd) ±0.9 °Ctpd (+5.0 to +50.0 °Ctpd) ±4 °Ctpd (-20.0 to -10.1 °Ctpd) ±1 °Ctpd (0 to +4.9 °Ctpd)
Reaction time	300 s

Measuring range	0 to +100 %RH

Pressure dewpoint probe for measurements in compressed air s...

Pressure dewpoint probe for measurements in compressed air s...

Humidity - Capacitive

Pressure dewpoint