
High-precision humidity and temperature probe
Application information

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Application
The high-precision humidity and temperature probe 0636 9743 is
used in conjunction with the testo 480 to measure humidity and
temperature.
The control and adjustment set 0554 0660 is not suitable
for adjustment. We recommend an annual calibration at
Testo.
Overview
1 Sensors
CAUTION
Damage to sensor!
> Do not touch the sensor.
2 Handle
3 Connection for plug-in head cable (art. no. 0430 0100)
2

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Technical data
Feature Values
Humidity measuring
0 to 100 %RH (non-condensing)
range
Humidity accuracy
(at 22 °C) ±1 digit
0 to 90 %RH: ±(1.0 %RH + 0.7% of meas.
1
val.)
90 to 100 %RH: ±(1.4 %RH + 0.7% of
meas. val.)
±0.03 %RH/K (based on 25 °C)
Temperature
-20 to +70 °C (probe head)
measuring range
Temperature
±0.5 °C
accuracy (at 22 °C)
±1 digit
Area of use handle 0 to +40 °C
The digital probe allows measurement values to be
processed directly in the probe. This technology eliminates
instrument measurement uncertainty.
For calibration, the probe alone (without the hand
instrument) can be sent away.
Calculating the determined calibration data in the probe
generates a zero-error display.
1
The measurement uncertainty for the relative humidity was calculated
according to GUM and includes hysteresis, dispersion, linearity, repeatability,
uncertainties of adjustment and test site, display resolution. This does not
include the uncertainty values of long-term stability and drift in the case of longterm high humidity measurement.
3