The Comark -20 - 80 F Refrigerator/Freezer Thermometer (RFT2AK) is an NSF certified dial thermometer that can either hang from or stand on the place you need to test. This thermometer is set in a stainless steel frame so it's durable, and it can read temperatures ranging from -20 to 80 degrees Fahrenheit. Comark - RFT2AK - -20 - 80 F Refrigerator/Freezer Thermometer presents colored zones to indicate whether an area is safe from potential spoilage, and the strips on the thermometer are easy to r...