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Installation
Water Cooling
29
5
5.6 Water Cooling
The linescanner is equipped with integrated stainless-steel pipes for water cooling. These pipes are embedded in
the cast aluminum housing. The water cooling system enables the linescanner to be installed in ambient
temperatures up to 180°C (356°F). Maximum pressure for the cooling fluid is 15 bar (218 PSI). Only filtered water
should be used in order to reduce the risk of clogging at the hose couplings. In order to prevent the accumulation
of water condensation on the scanner window and to protect the window, the air purge system should always be
used when water cooling is used.
Threaded tube fittings to connect a water cooling system are provided as accessory, see section 7.4
, page 46. The internal stainless steel tube is designed to mate to a hose with an internal diameter
of 6 mm (0.24 in).
The following table gives some examples for the efficiency of the water cooling system.
Table 5-1: Efficiency of the Water Cooling System
Ambient Temperature
Water Flow
Water Temperature at Inlet
Resulting Internal Temperature
180°C (356°F)
1 l / min (0.26 gallons / min)
25°C (77°F)
36°C (97°F)
180°C (356°F)
2 l / min (0.52 gallons / min)
15°C (59°F)
27°C (81°F)
5.6.1 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.