We have heaters for 8" to 18"
mirrors. They are very effective in the prevention of dew on Newtonian
telescope optics, particularly for those who have Dobsonian telescopes
with open truss tube designs.
These are installed behind the mirror
in between the mirror and the mirror cell and are held in place by
putting a thin skim of RTV silicone onto the heater and allowing the
heater to dry to the back of the mirror. We do not recommend using
heaters that would wrap around the outside of the optic as the thickness
of Newtonian primary mirrors make this ineffective due to their mass.
It is much better and much more effective to heat a primary mirror from
behind.
P8 will fit 8" mirrors, P10 is for 10" primary mirrors, P12 is for 12" to 14" primary mirrors, P16 is for 15" to 18" primary mirrors.
These heaters can be used with a
temperature sensor with our Premier Digital Dew Controller (#2002) or
our DigiFire-10 Controller (#2001-10) for accurate optic temperature
control or with any of our controllers in duty cycle mode.
