Refrigerator Thermometer; Scale Type Fahrenheit-Celsius; Minimum Temperature -40 Deg F; Maximum Temperature 80 Deg F; Fill Material Liquid; Display Type Dial; Mounting Type Self Mount; Applicable Standard NSFMany health departments require a secondary NSF listed thermometer to supplement the OEM indicator. Both our liquid and glass models offer best selling solutions in the HB120 economy model and the easy to read HZ80. The 25HBM delivers an easy to read Bi-metal accuracy in a dual hanging/ shelf mount version.