Yesterday, while cooking ribs, I took a break from the smoker and ran to Wal-Mart, looking for a thermometer. Yeah, the smoker has a bi-metal thermometer on it, but those are notorious for inaccuracy and I wanted to see what was available. I came home with two, and put them to work, monitoring various parts of the smoker.
The larger unit is a Taylor thermometer that I picked up at Wal-Mart. It cost 15 bucks, and has a probe that you can put in the oven. So, I wrapped the middle of the probe in a ball of aluminum foil to keep the probe tip from touching anything, and put it in the middle rack of the smoker.
The second thermometer, also by Taylor, is a smaller, pocket thermometer. I stuck it in the top vent of the smoker to see what the temps coming out the top vent are. I can't find it in Wal-Mart's online catalog, but it was hanging right next to the other one, on the shelf. Also, 15 bucks.
Still, it's nice to see how temperature varies across the various places in the cooker.