The shape of clinical thermometer is made prismatic instead of cylindrical because prismatic glass magnifies the image of capillary tube that makes easy to observe.
The clinical thermometer has a temperature scale marked from 35°C to 42°C. The clinical thermometer is a mercury thermometer which has been specially designed to measure the temperature of human body.The bulb is the lowest part of the thermometer, which has a spherical shape.
It is basically of triangular shape with rounded corners at the back of the thermometer which is the portion wherein the strip is embedded and it also has a rounded corner at the front of the thermometer.A thermometer has a glass tube sealed at both ends and is partly filled with a liquid like mercury or alcohol. As the temperature around the thermometer's bulb heats up, the liquid rises in the glass tube. ... When it is hot, the liquid inside the thermometer will expand and rise in the tube. It is made prismatic to refract maximum light towards its base & make mercury shining. It makes easy to take reading.
A thermometer has two important elements: (1) a temperature sensor (e.g. the bulb of a mercury-in-glass thermometer or the pyrometric sensor in an infrared thermometer) in which some change occurs with a change in temperature; and (2) some means of converting this change into a numerical value.A medical thermometer (also called clinical thermometer) is used for measuring human or animal body temperature.
A clinical thermometer is a thermometer used to measure human body temperature. Most made in the 20th century are mercury-in-glass thermometers. They are accurate and sensitive, having a narrow place where the mercury level rises very fast. A kink in the tube stops the mercury level from falling on its own.The Bulb. A swelling, or bulb, at the bottom of the thermometer stores the mercury used in calculating temperature readings.