Dial Thermometer Easy-to-read -40 Degrees To +160 Degrees F 1" Dial Face. Pocket-clip carrying case for protection and easy access. Temperature testing is a critical part of air conditioning and refrigeration service, and Robinair offers a full range of high quality, dependable pocket thermometers for simple temperature measurement. All thermometers come with a pocket-clip carrying case for protection and easy access. Easy to read dial faces are available in a variety of sizes and ranges.