Sintered PTFE filter, Ø 12 mm, for corrosive media

ISO humidity calibration certificate; with 3 measuring points: 11.3 / 50 / 75.3&nbsp;%RH at +25&deg;C

DAkkS humidity calibration certificate; with 3 measuring points: 11.3 / 50 / 75.3&nbsp;%RH at +25&nbsp;&deg;C

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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.

Use the humidity/temperature probe (with an appropriate measuring instrument) for the reliable measurement of relative humidity and temperature. Our humidity sensor is durable and traceable to international humidity standards, such as ILAC, PTB and NIST.

The ideal probe for measuring the humidity and temperature of the air in storage, refrigerated and work areas, as well as in air conditioning/ventilation ducts. Also suitable for long-term measurements.

Measuring range	-20 to +70 °C
Accuracy	*Please also take into account the device uncertainty. ±0.2 °C

Measuring range	0 to +100 %RH
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)

Diameter probe shaft	12 mm
Cable length	1,160 mm
Length probe shaft	140 mm

Humidity/temperature probe (Ø 12 mm)

Humidity/temperature probe (Ø 12 mm)

Temperature - NTC

Humidity - Capacitive

General technical data

Accessories

Certificates