FRIO-Temp® verification thermometers for sample temperature measurement within Freezers, Refrigerators, Incubators or Ovens without introducing contamination. These thermometers are •filled with environmentally safe non-toxic, non-hazardous, biodegradable Enviro-Safe ® liquid EnviroKleen™ certified by ChemTel, an independent laboratory (except H-B Catalog No. 20630 - Organic liquid filled) •comparable in accuracy to mercury filled thermometers, but are 100%environmentally safe (except H-B Catalog No. 20630 •PTFE coated •Individually serialized •Tested and calibrated in H-B’s exclusive triple accredited/registered ISO/IEC 17025:2005, A2LA accredited laboratory against equipment whose calibration is traceable to NIST and DKD/PTB •Accompanied by a Statement of Accuracy indicating accuracy traceable to NIST and DKD/PTB •Contain multi-language instructions (English, French, German, Italian, Portuguese and Spanish) •Individually packaged to prevent breakage •Narrow range certified at one specific point •0.5°C accuracy (1212P25 has an accuracy of 1°C; 1.5°C below -40°C) Please note: The aforementioned A2LA accreditation belongs to the manufacturer, not Northwest Scientific Inc.