This H-B Instrument FRIO-Temp Enviro-Safe filled refrigerator verification thermometer has a temperature range of -5 to 15°C. Featuring non-toxic, non-hazardous, biodegradable, each thermometer has accuracy equivalent to mercury thermometers, but without the hazards. Use to verify sample temperatures in ultra low freezers, refrigerators and incubators. Traceable to NIST, DKD/PTB and most standards through ILAC. Each thermometer features PTFE safety coating , a detailed Calibration Report stating corrections to one-tenth of the smallest division, and individual serial number. Tested and certified in our triple accredited ISO/IEC 17025:2005, A2LA accredited laboratory against equipment whose calibration is traceable to NIST and DKD/PTB. Individually packaged. Made in the USA. PTFE safety coated for added safety. Individually serialized. Liquid Fill: Enviro-Safe. Bottle Fill: Enviro-Safe. Range: -5 to 15°C. Divisions: 0.5°. Length: 125mm (4.5 inches). Accuracy: 0.5°C. Calibration Points: 6°C. 5/Case. H-B Instrument #:20700C.