Testo 0636 2161 | Robust humidity probe

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Testo 0636 2161 | Robust humidity probe NTC External Probes

Testo | Robust humidity probe
Order-Nr.  0636 2161
  • Probe for relative humidity and air temperature measurements
  • Measurements of the material equilibrium moisture content possible
  • Temperature measuring range: -20 to +125 °C (briefly up to +140 °C)
In combination with the testo 635, the robust humidity probe measures the humidity and temperature of the air. Because the probe can be used up to 125 °C, it also enables measurements in air exhaust ducts. In addition, it is suitable for measuring the material equilibrium moisture content, for example in bulk materials.
Product Description

When connected to the testo 635 humidity and temperature measuring instrument, the robust humidity probe measures the relative humidity and temperature in storage, refrigerated and work areas or in air conditioning/ventilation ducts. In addition, a material equilibrium moisture content measurement can be carried out. To do this, the function for calculating the H2O content must be activated on the measuring instrument and the material of the object being measured must be set (anhydrite flowing screed, cement flowing screed, lime sand brick, concrete, high-insulation brick, solid brick, hard wood, soft wood, aerated concrete and particle board).

The probe can also be connected to the testo 435-2 and testo 435-4 measuring instruments (however without the possibility of the measuring material equilibrium moisture content).

Delivery Scope

Robust humidity probe with 1.8 m fixed cable.
Technical Data
Temperature - NTC
Measuring range -20 to +125 °C
Accuracy ±0.5 °C 
Humidity - Capacitive
Measuring range 0 to 100 %RH
Accuracy ±2 %RH at +25 °C (+2 to +98 %RH)
±0.1 %RH/K (k=1)
long-term stability: ±1 %RH / year
*The sensor accuracy corresponds to the system accuracy.
General technical data
Length probe shaft 300 mm
Diameter probe shaft 12 mm
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