We are living in some of the common thermometer

In our life there are many different kinds of thermometer, life some of the common thermometer mainly has the following kinds: thermometer thermometer is a kind of highest thermometer, it can record the thermometer is the highest temperature was measured. After using the thermometer should be & other; Back to the table & throughout; , namely with the upper part of the thermometer off down hard, can make have to tube of mercury, back to the glass bulb. Other thermometer can't shaking, this is the thermometer and other liquid thermometer a major difference. A thermometer is also called & other; Clinical thermometer & throughout; 。 Material is mercury thermometer work. Its glass bubble volume is much bigger than the volume thin tube above. Mercury in the bubble, due to the influence of temperature, produce small changes, the expansion of the volume of mercury, make the length of the tube of mercury obvious changes. Human body temperature changes generally between 35 ℃ to 42 ℃, so the thermometer calibration is usually 35 ℃ to 42 ℃, and the scope of each degree and into October, so the thermometer can be accurate to 1/10 of a degree. The bottom of the thermometer near the vacuole of the tube is a very narrow neck curve neck, when measuring temperature, the mercury inside the vacuole, thermal volume expansion, mercury can be made of the neck part rises to the tube position, when reach thermal equilibrium with the temperature, the mercury column constant. When the thermometer after leaving the body, the outside temperature is low, mercury cold air volume contraction, is in the narrow neck piece part broken, already part of the mercury back into tube don't come back, still keep in contact with human body going to height. Ear thermometer which is a specially used to measure the tympanic membrane temperature thermometer, through infrared guided wave tube will mainly by the launch of the infrared radiant energy transmitted to the eardrum thermopile thermal detector, the infrared radiation energy into electricity signal processing after the body temperature information. T in 1986. Shinozaki thermopile detector made the first applications such as ear thermometers appear on the market in the United States. Now on the market to sell the ear thermometer, many varieties of different forms, the ear thermometer generally equipped with a disposable probe cover, in order to maintain clean and prevent infection. Due to the temperature stability of the tympanic membrane, internal temperature and can directly reflect the human body, so when used correctly the ear thermometer readings can be used as a medicine for confirmation. But due to put forward a higher request to the user, and the use of disposable probe cover, typically used in hospitals or families. Indoor thermometer indoor glass thermometer is a kind of artificial fire, priming and other process, low cost, measurement accurate, easy to use, without the power of the traditional temperature measurement products. Widely used in the production and life. With round or triangular rods glass as raw materials, with mercury or organic solution, Kerosene, alcohol, etc. ) As a thermal fluid, create suitable for the different needs of various products. Coffee thermometer thermometer belongs to the bimetallic thermometer, bimetallic thermometer main component is a use 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. End is heated expands, turns the pointer, the instrument will show thermoelectric potential should value.