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AstroSystems - Dew Heaters

 

Secondary Dew Guards

AstroSystems amazing Dew Guard secondary mirror heating system automatically senses the air temperature and
the mirror temperature, then maintains the secondary at a preset (adjustable) temperature above the ambient
air temperature.  Gently warms the secondary at 2-4 watts when on full.  The DG-1 has 4, The DG-2 has 6 and
the DG-3 has 8 evenly spaced contact points for optimal thermal distribution.  Uses any external 9-15 volt dc
supply or you can run on a 9v battery mounted at the holder, eliminating the need for wires across the spider.
 No more heat ropes!  Three sizes to choose from.
 

AstroSystems - Secondary Dew Guard
For 1.3-2.1 inch mirrors

$ 37.00

AS_DG-1
 

AstroSystems - Secondary Dew Guard
For 2.6-3.1 inch mirrors

$ 42.00

AS_DG-2
 

AstroSystems - Secondary Dew Guard
For 3.5-6.0 inch mirrors

$ 47.00

AS_DG-3

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