Thin Humidity Probe - For Material Moisture

Part Number: 0636 2135 Brand: Testo

Thin Humidity Probe - For Material Moisture

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Thin humidity probe with built-in electronics, incl. 4 attachable Teflon protection caps for material moisture equilibrium measurement.

Materials which take in and retain or release water are described as hygroscopic materials.

Hygroscopic materials always try to form a moisture equilibrium with the surrounding air.

This principle is used to measure the moisture in material by measuring moisture equilibrium.

Ideally, moisture equilibrium is measured in a bore hole in the material.

To keep the bore hole as small as possible, a thin .16 in. humidity probe is used.

It should be protected from dirt by a Teflon cap during measurement. The bore hole is then simply sealed using sealing clay.

Based on the moisture equilibrium measured, Testo 635 automatically shows material moisture in % in the display.

Material moisture calculation is available for the following materials:
  • Concrete
  • High-insulation bricks
  • Solid bricks
  • Hard wood
  • Soft wood
  • Gas concrete
  • Particle board
  • Calcium sulphate floating screed
  • Cement floating screed
  • Lime sand brick
Materials are easy to select from the menu. Using the "Material" user profile, the material can be accessed directly at the touch at a button

Additional material characteristics can be stored in testo 635-2 using ComSoft.
  • Measurement of the material moisture via the equilibrium moisture content
  • Slim design (Ø 4 mm) with remote electronics – ideal for tight measuring points



Delivery Scope

  • Thin Humidity Probe (Ø 4 mm) with PTFE Protective Cap and Adhesive Modelling Clay (4 items), including Fixed Cable

Diameter Probe Shaft

  • 0.157 in. / 4 mm

Length Probe Shaft

  • 2.362 in. / 60 mm

Temperature - NTC

  • Measuring Range: 32.0° F to 104.0° F / 0° C to +40° C
  • Accuracy: ± 0.4° F / ± 0.2° C
  • *Please also take into account the device uncertainty

Humidity - Capacitive

  • Measuring Range: 0 to +100 %RH
  • *The sensor accuracy corresponds to the system accuracy
  • Accuracy: ± 2 %RH at +77° F (+2 to +98 %RH) / ± 2 %RH at +25° C (+2 to +98 %RH) | ± 0.15 %RF/K (k=1) | Long-term Stability: ± 1 %RH / year


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