For cooking and handling purposes, many chefs look to pocket test thermometers to store in those nifty sleeve pockets of a chef's coat. We get a lot of chefs asking for “that great blue thermometer” and we know they mean a PDQ400 or the PDT300 (our most popular). Comark test thermometers are not only quick, reliable, and accurate, they're also waterproof which means you could run them through your dishwasher to sanitze or to test the of rinse cycle (which should reach 180°).