Air/Water Cooled Housing (Cooling Option 1); Avoidance Of Condensation; Figure 37: Endurance Head With Air/Water-Cooled Housing - Fluke Endurance Series User Manual

8.5. Air/Water Cooled Housing
The Air/Water Cooled Housing allows the sensor to be used in ambient temperatures up to
120°C (250°F) with air-cooling, and 175°C (350°F) with water-cooling. The cooling media
should be connected using 1/8" NPT stainless steel fittings requiring 6 mm (0.24 in) inner
diameter and 8 mm (0.31 in) outer diameter for the tube.
Air flow should be 1.4 to 2.5 l/sec at 25°C (77°F). Water flow should be approximately 1.0 to
2.0 l/min (water temperature between 10 and 27°C / 50 to 80.6°F). The maximal pressure limit
is 5 bar (73 PSI). It is not recommended to use chilled water below 10°C (50°F).
The Air/Water-Cooled Housing is made from stainless steel and is delivered with air purge. The
air purge should be always used to keep the lens dry.

8.5.1. 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.
1.800.561.8187
(Cooling Option 1)
The Air/Water Cooled Housing is equipped with plugs only removable with
a 5 mm hex wrench. Check your supplier for appropriate fittings.

Figure 37: Endurance Head with Air/Water-Cooled Housing

For ambient temperatures exceeding 175°C (350°F), the ThermoJacket can
be used. This accessory allows operation at ambient temperatures up to
315°C (600°F)!
www.

Air/Water Cooled Housing (Cooling Option 1)

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