While my thermometer that came with the WSM was way more accurate than most people's, the thing use to fog up like crazy so you could barely read it.
I got a Midwest Hearth (rebadged TelTrue that comes with the mounting nut and washer) 3" dial and 4" stem. I kept the bezel from the stock thermometer and just use my Dremel to cut away the material where the thermometer has a bulge in the back. I drilled the hole larger and I placed some thermal tape over the slot in the dome that the old thermometer housing used so as to limit the amount of smoke that comes out around the thermometer/bezel. I think it is a little cleaner look with the bezel instead of just the thermometer.
Here are some pics that aren't the best.
I got a Midwest Hearth (rebadged TelTrue that comes with the mounting nut and washer) 3" dial and 4" stem. I kept the bezel from the stock thermometer and just use my Dremel to cut away the material where the thermometer has a bulge in the back. I drilled the hole larger and I placed some thermal tape over the slot in the dome that the old thermometer housing used so as to limit the amount of smoke that comes out around the thermometer/bezel. I think it is a little cleaner look with the bezel instead of just the thermometer.
Here are some pics that aren't the best.