High-precision humidity/temperature probe head

Order-Nr.  0636 9770

  • Intuitive: parallel determination of relative humidity and air temperature in indoor areas, including long-term measurement

  • Precise: carry out humidity measurements with an accuracy of ± (0.6% RH + 0.7 % of m.v.) in the range between 0 and 90% RH, calculation of wet bulb temperature, dew point and absolute humidity

  • Convenient: probe head is easy to attach to the universal handle with Bluetooth® or cable (available to order separately)

  • Intelligent calibration concept: only send in the probe head for calibration

More applications, less equipment: if you already own one of our probes with a universal handle, you can easily expand your portfolio of probes with the high-precision humidity/temperature probe head.


Product Description

Proven quality from Testo: you can depend on reliable measurement results, because the probe head is equipped with our high-precision, long-term stable humidity sensor. This measures the humidity with an accuracy of ± (0.6% RH + 0.7% of m.v.) in the range between 0 and 90% RH and is traceable to international humidity standards, such as ILAC, PTB and NIST.

Delivery Scope

High-precision humidity/temperature probe head including calibration protocol.

Please do not use the probe head in condensing atmospheres. For continuous application in high-humidity ranges
    > 80% RH at ≤ 30 °C for > 12 h
    > 60% RH at > 30 °C for > 12 h
please contact Testo Service or contact us via the Testo website.

Related products

Technical Data

Temperature - NTC

Measuring range

-20 to +70 °C


±0.3 °C (+15 to +30 °C)

±0.5 °C (Remaining Range)


0.01 °C

Humidity - Capacitive

Measuring range

0 to 100 %RH


±(0.6 %RH + 0.7 % of mv) (0 to 90 %RH)

±(1.0 %RH + 0.7 % of mv) (90 to 100 %RH)

±0.03 %RH/K (k=1)

long-term stability: ±1 %RH / year

Hysteresis: ±0.4 %RH


0.01 %RH

General technical data

Storage temperature

-20 to +70 °C


20 g


160 x 28 x 28 mm

Operating temperature

-20 to +70 °C

Diameter probe shaft

12 mm

Length probe shaft

140 mm

Product colour