Model no. BT20 manufactured by Trotec,Germany is an insertion thermometer with a needle which can be inserted into the material for which the temperature need to be measured. Typical applications are for measuring the temperature during food processing, food storage etc. As it is used for measuring the temperature deep inside, it is generally known as food core thermometer. Various other terminologies used for the same are probe thermometer, insertion thermometer, penetration thermometer etc.