WELCOME EVERYBODY

We are Presenting………. Mercury Thermometer

History Inventor Daniel Gabriel Fahrenheit (24 May 1686-16 September 1736)

What is Thermometer?

Mercury is Used Because…….• Rapid heat conductor• Linear expansion• Low freezing point (-400c), high boiling point (3570c)• No capillary force between mercury and tube• Mercury does not wet the tube Surface

Structure Of Mercury Thermometer

Uses of Mercury Thermometer ?

Fever MeasurementFood Temperature measurementRoom Temperature measurement Industrial Product’s Temperature

measurementDetermine Liquid Temperature

Basic PrincipalsFarenheitProper Lines Indication 1 degreeShort Line indicate .2 degree

CelciousLong Line indicate 1 degree or .5 degreeShort Line indicate .1 degree

AdvantageCheapDurableAccurateEasily Calibrated

Disadvantage Display is harder to read. Does not work below -390C. Cannot be used for thermograph. Slow response. Mercury vapor is poisonous.

THANKS TO EVERYBODY