The AST-18 is a feature packed thermometer offering an enhanced measurement range (-50 to 330C), data hold to retain the measured value, auto power off after 15mins of inactivity and an IP-54 protection rating. The protective sheath with ventilation hole allows the unit to be used as a stirrer whilst simultaneously displaying temperature. -50 to 330C x 0.1 Water resistant to IP-54 rating - dust protected & splash proof Auto power off after 15mins of no activity Push-button membrane keypad 150 x 4mm stainless steel probe The thermistor sensor is located in the bottom 10mm of the probe Pointed probe tip makes this instrument ideal for liquid or semi-solid sampling 13mm LCD display with function indicators Data hold function retains the displayed value Polycarbonate case and protective sheath Supplied with a protective probe sheath with pocket clip & battery