Ideal for controlling and calibrating humidity probes at 11.3 %RH and 75.3 %RH

Ideal for continuous measurements in humid environments.

<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;"><b>Product no longer available. Have you checked out its successors?<br/>Why not enjoy the benefits that they have to offer: <a href="https://www.testo.com/multifunction">>> To the products</a></b></div>

<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;"><b>Product no longer available. Have you checked out its successor?<br/>Why not enjoy the benefits that it has to offer: <a href="…/p/0560-4402">>> To the product</a></b></div>

The testo 635-1 for temperature and humidity measurement with its State-of-the-art technology and large selection of probes allows you to measure temperature, air humidity and dew point – in compressed air as well.

The testo 635-2 temperature and humidity measuring instrument with its leading-edge technology and wide selection of optional sensors helps you in carrying out temperature and material moisture measurements on a variety of different materials, surfaces and environments.

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.

Temperature Probe by Testo. Useful for measuring temperature and humidity. Long term stability.

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

Humidity - Capacitive	Measuring range 0 to +100 %RH
Humidity - Capacitive	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)

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

Temperature probe

Temperature probe

Temperature - NTC

Temperature - NTC

Humidity - Capacitive

Humidity - Capacitive

General technical data

General technical data

Accessories

Certificates