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The capillary tube is the hollow opening inside the thermometer that the liquid rises or lowers in so that you can read the temperature. The bulb is the bottom portion that holds the liquid and the part you use for contact to get a temperature reading.

Calvin B.

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15y ago

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How does a fluid expansion thermometer work?

A fluid expansion thermometer consists of a bulb filled with a liquid, typically mercury or alcohol, connected to a capillary tube. As the temperature increases, the liquid in the bulb expands and rises up the capillary tube. The temperature is read by measuring the height of the liquid in the tube, which corresponds to the temperature scale on the thermometer.


What is a capillary tube in instrumentation terms?

a thermometer--


Describe the structure of a thermometer?

The thermometer consists of a very fine glass tube having a very small bore and is called capillary tube. At one end of capillary tube a very thin glass bulb is provided. The bulb is filled with mercury( most of the times) or alcohol The other end of capillary tube is sealed. The capillary tube is protected by a thick glass tube called stem. On the stem are made markings. These markings are called graduations or degrees.


How do you increase sensitivity of mercury in glass thermometer?

Sensitivity of a thermometer is the length of increase of the liquid per degree rise in temperature. More sensitive means more noticeable expansion. So if you want to increase the sensitivity, you could have a thinner capillary tube, a larger thermometer bulb etc. :)sailesh


What does the volume of a thermometer refer to?

The volume of a thermometer typically refers to the amount of liquid (such as mercury or alcohol) contained within the thermometer's bulb and capillary tube. This liquid expands or contracts with changes in temperature, allowing the thermometer to display the temperature reading.


What is the formula between length of mercury level and temperature in degree celsius?

There is none. In the case of a thermometer, it will depend on the relative dimensions of the bulb and the capillary tube.


What is the definition of Glass thermometer?

thermometer consisting of mercury contained in a bulb at the bottom of a graduated sealed glass capillary tube marked in degrees Celsius or Fahrenheit; mercury expands with a rise in temperature causing a thin thread of mercury to rise in the tube


What is thermometer made up of?

In this answer I m referring to the normal thermometers. Not the electronic thermometers. There is a very very thin capillary tube incide the thermometer which is filled with mercury and it has a bulb aT one end. When it touches a surface, the mercury expands, rises in the capillary and the temperature is shown.


What is a thermometer bore?

A bore refers to the extremely fine or narrow tube found in a thermometer. It is called a narrow bore or a capillary.


What two items are in a thermometer?

A precision capillary tube with a graduated scale and a liquid such as mercury or alcohol that will expand as the temp increases.


How does gas thermometer functioning?

A gas thermometer measures temperature by the variation in volume or pressure of a gas.One common apparatus is a constant volume thermometer. It consists of a bulb connected by a capillary tube to a manometer. The bulb is filled with a gas such that the volume of the gas in the bulb remains constant. The volume is related to temperature by k, known as Charles's Law . The pressure of the gas in the bulb can be obtained by measuring the level difference in the two arms of the manometer. Gas thermometers are often used to calibrate other thermometers.


Why is the walls of long tube above the thermometer bulb are made thick?

The walls of the long tube above the thermometer bulb are made thick to provide insulation and minimize heat transfer from the environment, ensuring that the temperature measurement at the bulb is accurate and not influenced by external temperature changes. Thicker walls also help protect the thermometer from physical damage.