Robust humidity probe for meas. up to +257 °F, short-term up... - 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)

Robust humidity probe for meas. up to +257 °F, short-term up to +284 °F, Ø 0.47 ", e.g. exhaust ducts, and for meas. of material equilibrium moisture, e.g. bulk goods

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.
Temperature - NTC

Measuring range

-4.0° to 257.0 °F / -20 to +125 °C


±0.4 °F / ±0.2 °C

Humidity - Capacitive

Measuring range

0 to +100 %rH


±2 %rH (+2 to +98 %rH)

General technical data

Diameter probe shaft

0.5 in.

Length probe shaft

11.8 in.