Taylor Professional Oven Thermometer : Easy-to-read, large dial oven thermometer is accurate to 150 F to 600 F to ensure correct oven temperatures. Hang, stand or clip to oven rack. 3 1/2"L x 3"W x 1" thick (w/clip).
Recently someone made an oyster casserole but the oven was not working properly and what she didn't realize is that her oven's thermostat was broken and never reached the required temperature. This could have been a very dangerous situation. People really need to be aware if there oven is not heating properly. Only by constant use of a good quality thermometer like this Taylor version can you do that. I had no problems attaching it to my rack. I wouldn't be "caught dead" without one!