Specifications

amount of water absorbed – it is bright orange when it is dry and turns to
transparent without any color hue when it becomes wet. The temperature range
for drying of the the used silica-gel is 130 to 160 °C.
Silica-gel container construction differs on different G2 camera revisions.
Changing the silica-gel in G2 cameras revision 3
G2 cameras revision 3 and higher have the container accessible from the back
side of the camera head.
The slotted desiccant chamber cap can be unscrewed e.g. by a coin. Pour out
wet silica-gel and fill the chamber with a dry one.
The desiccant container can be left open without the fear from contamination of
CCD chamber interior by dust. There is a very faint stainless steel grid between
the CCD chamber and the desiccant container, so dust particles cannot enter the
chamber itself. It is even recommended to keep the desiccant container cap off
for a couple of hours when the camera is in the room with low humidity. This
helps drying the CCD chamber interior and prolongs the silica-gel exchange
interval.
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Illustration 26: Silica-gel container is under the screwed cap
with slot, right of the fan vents