Food center, the working principle of the thermometer

Food center thermometer is a kind of field detection instrument. Insert the probe into the food, directly measuring temperature at the center of all kinds of food. Food center main component is a thermometer with two or more pieces of metal laminate composed of multilayer metal together, using two different metal working in the principle of expansion degree of different temperature changes. Food center, the working principle of the thermometer is the use of two different temperature expansion coefficient of metal, in order to improve the temperature measuring sensitivity, is usually made of metal spiral coil shape, when multi-layer metal temperature change, the layers of metal expansion or contraction, makes the spiral coil rolled up or let go. As a result of the spiral coil end fixed and the other end connected to a free rotating pointer, therefore, when the bimetallic strip feel the temperature change, Pointers can be on a circular dividing scale to indicate the temperature.