testo saline pots for control and humidity adjustment of humidity probes, 11.3 %RH and 75.3 %RH with adapter for humidity probe.

Teflon sintered filter, Ø 0.47 in., for corrosive substances

Stainless steel sintered cap, Ø 0.47 in.

The testo 635-1 temperature and humidity measuring instrument enables you to measure the temperature, air humidity, and dew point &ndash; in compressed air as well. State of the art technology and a large selection of probes, which are available optionally, allow for a wide variety of measuring possibilities.

The testo 635-2 temperature and moisture meter measures the temperature and moisture of different types of materials, surfaces, and environments, with a wide range of optional sensors.

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.

Humidity/temperature probe (Ø 12 mm)

Humidity/temperature probe

Industrial Manufacturing

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Temperature - NTC	Measuring range -4.0° to 158.0 °F / -20 to +70 °C
Temperature - NTC	Accuracy *Please also take into account the device uncertainty. ±0.4 °F / ±0.2 °C

Humidity - Capacitive	Measuring range 0 to +100 %rH
Humidity - Capacitive	Accuracy long-term stability: ±1 %RH / year ±0.03 %rF/K (k=1) *The sensor accuracy corresponds to the system accuracy. ±2 %rH at +77 °F (+2 to +98 %rH) / ±2 %RH at +25 °C (+2 to +98 %RH)

General technical data	Diameter probe shaft 0.472 in. / 12 mm
	Cable length 45.669 in. / 1,160 mm
	Length probe shaft 5.512 in. / 140 mm

Humidity/temperature probe

Humidity/temperature probe

Temperature - NTC

Temperature - NTC

Humidity - Capacitive

Humidity - Capacitive

General technical data

General technical data

Accessories