Page 1
Handling instructions
Flexible humidity probe
0628.0022
Description
Humidity probe with 1.5 m long, flexible cable.
A humidity sensor and a temperature sensor are
situated in the tip of the probe (sintered cap).
Application
Humidity and temperature measurements in uneasily
accessible places e.g. in drilled holes, pipes, as well as
climatic test cabinets, medical analysing instruments,
incubating cabinets, etc.
The flexible humidity probe has been developed for
applications with the testo 445, 645 Professional
Class measuring instruments. Use the connection
cable available (see ordering data) for your instrument
for connection to the other instruments.
Please read the instruction manual before using the
measuring instrument.
Technical data
Make sure that that the flexible cable does
not get badly bent (bending radius > 20 mm),
as this may destroy the cable!
Observe the measuring range of the probe!
Overheating can destroy the probe!
Measuring range ................................... 0 to 100 % RH
-20 to +180 °C
Input temperature .......................................... Ni 10000
Accuracy ............................ ±2 % RH (2 to 98 % RH)
at nominal temperature +25 °C
±0.6 °C (-20 to 0°C)
±0.5 °C (0 to +25 °C)
±1.1 °C (+25 to +180 °C)
Resolution, humidity ..................................... 0.1 % RH
Resolution, temperature .....................................0.1 °C
Length of probe .............................................1500 mm
Ø probe tip ........................................................12 mm
Ø cable ..........................................................6 mm
Minimum bending radius ...................................20 mm
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Page 2
Handling instructions
Flexible humidity probe
Depending on the application and dirt which has
Care and maintenance
gathered, we recommend a quaterly to yearly control
with our 0554.0660 control and calibration set.
For instructions on the use of this control and calibration set, see the corresponding instruction manual.
Clean dirty sensors with alcohol (isopropanol) or distilled water.
Unscrew the sintered cap.
Dip the sensor in the alcohol, rinse in distilled water
and then leave to dry in the air.
Put the sintered cap back on and screw up tightly.
Do not touch or knock the sensor!
The active surface (flat metallic side) of the sensor
must face outwards!
Faulty sensors can be replaced, please contact our
service department.
Dirty sintered caps can also be cleaned in alcohol or
in distilled water, or purged with compressed air.
Flexible humidity probe (without cable) ....... 0628.0022
Plug-in head connection cable (1.5 mtr.)
for testo 445, 645 ..................................... 0430.0143
Plug-in head connection cable (5 mtr.)
for testo 445, 645 ..................................... 0430.0145
Humidity sensor ......................................... 0554.6005
Temperature sensor (Ni10000) .................. 0554.6014
Sintered cap .............................................. 0554.0641
Humidity control and calibration set ........... 0554.0660
11,3 %/75,3 %, instruction manual
Flexible humidity probe ................................12 Monate
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Ordering data
Warranty
0973 0610 de en 01
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