High accuracy fridge temperature monitoring of vaccines, medicines and food. Large LCD display simultaneously displays current and max/min recorded temperatures. Programmable high & low audible alarms. CalCheck 0. 0 °C (±0. 1 °C) function allows verification of thermometer accuracy. External sensor(s) simulate fridge contents temperature. Thermistor probe is encased in a sealed bottle. Top up with Glycol solution (50 ml bottle supplied). Splash-proof IP54 ABS case with 'Biomaster' ad