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EE33 Humidity / Temperature Sensor for High Humidity and Chemical Applications
4.1 Heating Modes
4.1.1 Condensation Prevention (CP) Against Temporary Condensation
Temporary condensation on the sensing element in highly humid environments is eliminated when a
specified RH set point (factory setting: 99 %RH) is reached. By intensive heating of the sensing element
for 10 seconds occurring dew is evaporated. Thanks to its monolithic structure, the sensing element
cools off quickly within approximately 3 minutes and returns to its measurement function.
If condensation is still detected after the CP process, it restarts after a cycle time of 30 minutes.
During the complete heating and cool-down process, the values on the 2 analogue outputs are frozen.
In other words, the measuring values at the analog outputs are kept constant during the CP cycle.
T [°C]
start CP cycle
RH > RH setpoint
heating time
temp. condensation (10 s)
cool-down time
min. > 3 min
freezing period of output signals
ambient temperature
t [min]
Please note:
If the defined cool-down time is too short, the measurements may be incorrect.
heating time
temp. condensation (10 s)
cool-down time
e.g. 2 min
freezing period of output signals
T [°C]
t [min]
humidity output
temperature output
ambient humidity
ambient temperature
RH [%]
