construction of clinical thermometer

The wall of the bulb is made thinner and the capillary tube is made narrower to make the thermometer more sensitive. A clinical thermometer is used to measure the temperature of human body. Now the tube is kept vertically straight by a stand and a funnel F is connected by a rubber tube to the open end of the capillary tube. A clinical thermometer has a constriction near the bulb in it. Then the mercury level drops and remains inside the bulb. Mercury thermometer expands and contracts according to the rise or fall in temperature. Construction: It consists of a cylindrical bulb B which is filled with mercury. It is a long narrow glass tube with a bulb containing mercury at the end. Even after the thermometer removed from the body. Now the tube is kept vertically straight by a stand and a funnel F is connected by a … common interests and common objectives are not necessary for society. In this condition, if the thermometer is placed under the tongue or under the arms, the temperature and consequently the volume of the thermometer increases. The stem consists of a thin capillary tube at the end of which there is a bulb containing mercury. This helps the mercury in the bulb to acquire the patient's temperature more quickly and precisely. Stay connected with Kullabs. A capillary tube arises from this bulb. The temperature can be read. Usually, laboratory thermometer is made in Celsius scale which has the scale from -100 C to 1100 C. Write short note on clinical thermometer. The classification of the thermometer, such as oral or armpit, affects its features. Community smaller than society. They are available in the ear, rectal, armpit, forehead and oral models. It has a bulb of very thin glass attached to a capillary of the very fine bore. Laboratory thermometer … In this way, the bulb and the tube become filled with mercury. The volume of air inside the bulb and the tube expands due to heat and some air comes out through the mercury as bubbles. The volume of air inside the bulb and the tube expands due to heat and some air comes out through the mercury as bubbles. Then the bulb is heated so that mercury inside the bulb and the tube starts boiling and ejected vapor removes air from the tube. According to construction there are different types of thermometer, they are: Clinical thermometer, Maximum and minimum thermometer, Laboratory thermometer; A clinical thermometer is used to measure the temperature of human body. When the bulb is cooled to room temperature, the bulb and a part of the capillary tube become filled with mercury and the rest of the capillary tube remains empty. Since it is measured the highest temperature of a body. All rights reserved. In mercury thermometer, the, The difference in temperature between these two fixed points is called the, Depending on the temperature scale, the fundamental interval is equally divided into some divisions and each division is called. When the mercury returns to the normal state, two marks are made on the tube corresponding to the temperatures of the two fixed points. So it is called maximum thermometer. The normal temperature in a clinical thermometer is from about 35 degrees to 42 degrees. Hence, the clinical thermometers have the range 35˚C to 42˚C. One end of it is connected to a cylindrical bulb B and the other end is closed. A clinical thermometer is a tool for measuring body temperature. The difference in temperature between these two fixed points is called the fundamental interval. Thermometers consist of three basic elements: spirit-filled liquid, which response to changes in heat and cold; a glass tube to house the temperature-measuring liquid; and black ink to color in the engraved scale marks with readable numbers. Sign up and receive the latest tips via email. This helps the mercury in the bulb to acquire the patient's temperature more quickly and precisely. The capillary tube has a kink near the bulb which prevents the mercury from …

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