This incredibly precise refrigerator thermometer is crafted to deliver accurate and dependable measurements, even in the face of abrupt temperature fluctuations. This capability is attributed to its liquid thermal shield, which guarantees a more accurate depiction of food temperature, even with frequent opening of the refrigerator door. Operating within a temperature range of -30°C to 27°C (-20°F to 70°F), it holds certification for meeting the hygiene standards set by NSF International.