This H-B Instrument® DURAC® Plus refrigerator verification thermometer has a temperature range of 20 to 60°F. Ideal for chemical industry, petrochemistry, pharmaceutical, medical, cosmetic, producers of chemicals, university, dairies, breweries, distillers, beer cellars, refrigeration houses, hot houses, scientific institutes, blood banks, refrigeration/freezer/incubator/oven equipment producers and producers of laboratory equipment. Each thermometer features individual serial numbers and a Statement of Accuracy indicating accuracy traceable to NIST. Tested and calibrated in an exclusive triple accredited/registered ISO/IEC 17025:2005, A2LA accredited laboratory against equipment whose calibration is traceable to NIST. Individually serialized. Type: Refrigerator. Range: 20 to 60°F. Divisions: 0.5°. Length: 135mm (5.3 Inches). Accuracy: 2°F. Thermometer Fill Type: Organic. Bottle Size: 30mL. Bottle Fill Type: Glass Beads. Traceable To NIST: Yes. Traceable To DKD/PTB: No. PTFE Coated: No. 25/Case. H-B Instrument® #: 4/0160.