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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.

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Q: Where is the capillary tube and bulb in a thermometer?
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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.


What is a capillary tube in instrumentation terms?

a thermometer--


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 is the signal conditioner of mercury-in-glass thermometer?

The capillary tube of the thermometer ( in case of a mecury thermometer).


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 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 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


Is mercury in any devices always in a capillary tube?

A thermometer has a capillary tube but a mercury switch in a heater thermostat has mercury that just rolls back and forth.


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.


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.


Is the external bulb of a thermometer also made of mercury?

The red liquid in a thermometer is Mercury, which is usually encased in a glass tube


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.