Hi,Friends
The camera housing in aluminium is air purged and the air then exits round the front glass acting as an air curtain, we can then use an air knife in front of the camera house for added protection.
In some cases where a camera would keep clean for maybe only 4 hours we have managed to reach 30 days using this housing and air-knife, typically these cameras are cleaned once every 24 hours. The same technique is used on high frequency lighting.
Paper mills are fairly harsh environments, steam, heat, vibration chemicals etc, normal housings and lights do not last.
