Prevent food spoilage by accurately monitoring your refrigerator and freezer interior temperatures. Large Celsius and Fahrenheit scales enable at-a-glance reads. Shatter-resistant lens minimizes the potential for breakage. Thermometer may be mounted horizontally or vertically. Circular. Meter Type: Thermometer; Scaling System: Celsius; Fahrenheit; Measurable Range: -20°F to 80°F; -30°C to 30°C; Analog/Digital: Analog.