Robinair 40895 Dial Thermometer, 40 to +70C, 1" Face

Robinair Pocket Dial Thermometer with a compact, yet easy to read, black on white 1 inch face Perfect for checking automotive, home, or commercial A/C performance at the vent Reads -40 to +70 degrees Celcius Convenient pocket-clip carrying case protects the thermometer when not in use but keeps it handy for easy access when you need it Adjustable design ensures accuracy - simply twist thermometer face to known temperature (32F ice water works well) while holding 10 mm nut on base with a wrench