Write the construction of laboratory thermometer.
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A Laboratory thermometer is used for measuring the temperature of liquids and objects
Principle of working: Matter expands on heating.
Constructions:
It is made up of long fine capillary tube of uniform bore and bulb . It is filled with mercury.
the bulb is made relatively larger than its bore to contain more liquid so as to improve sensitivity.
The round glass stem around the capillary tube is made thick. It acts as a magnifying glass.
Range of Clinical Thermometer : -10 degrees C to 120 degree c
Principle of working: Matter expands on heating.
Constructions:
It is made up of long fine capillary tube of uniform bore and bulb . It is filled with mercury.
the bulb is made relatively larger than its bore to contain more liquid so as to improve sensitivity.
The round glass stem around the capillary tube is made thick. It acts as a magnifying glass.
Range of Clinical Thermometer : -10 degrees C to 120 degree c
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Answer:
Laboratory thermometer consists of a thick walled fine bore glass capillary tube. It has a small thin bulb at its lower end and it is filled with pure /dry Hg or colored alcohol. The portion of the capillary tube above the bulb is commonly called stem.
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