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Air/Water-Cooled Housing
79
11
mm [in]
11.4.1 Avoidance of Condensation
If environmental conditions make water cooling necessary, it is strictly recommended to check whether
condensation will be a real problem or not. Water-cooling also causes a cooling of the air in the inner part of the
sensor, thereby decreasing the capability of the air to hold water. The relative humidity increases and can reach
100% very quickly. In case of a further cooling, the surplus water vapor will condense out as water. The water will
condense on the lenses and the electronics, resulting in possible damage to the sensor. Condensation can even
happen on an IP65 sealed housing.
Note
There is no warranty repair possible in case of condensation within the housing!
To avoid condensation, the temperature of the cooling media and the flow rate must be selected to ensure a
minimum device temperature. The minimum sensor temperature depends on the ambient temperature and the
relative humidity. Please consider the following table.
