Do you know what household thermometer?

The classification of the thermometer is various, such as electronic thermometer, bimetallic thermometer, solar energy a body surface temperature and pressure, pressure type thermometer. These categories can be further subdivided into many small classes. Bimetallic thermometer, for example, can also be divided into household thermometer, bimetallic thermometer used in industry, but their works are the same, the use is the principle for the expansion of the solids, its main is composed of two kinds of the difference in expansion coefficient of metal, piled up two pieces of metal welded together constitute a bimetal thermal components. When the temperature changes, the two pieces of metal due to varying degrees expansion makes the expansion degree of large pieces of metal bent and, in turn, produce displacement, at this point, the change of temperature has changed to the change of displacement, and according to the conversion relationship between the temperature and the displacement will revert to the measured displacement value can be displayed. In fact, no matter in which aspect, the range of the thermometer determines its purpose. Today we explain some of the common household the range of the thermometer. Indoor thermometer, range is generally - Thermometer 37-30 + 50 c 42 c; Measure water temperature thermometer 0 - 100 c; An oven thermometer 0 300 c; The refrigerator thermometer - 40 + 40度。 These household thermometer forms, beautiful appearance, long service life, is to pay attention to when using regular cleaning and inspection.