Saturday, 11 August 2012

Instruments for Measuring Gas Pressure

A) Manometer

The Manometer

1) A manometer consists of a U-tube containing a liquid such as mercury or water. It is usually used for measuring differences in gas or liquid pressure.
2) A sphymomanometer is a mercury manometer designed for doctors to measure the blood pressure of patients. 

B) Bourdon Gauge

Bourdon Gauge

1) A Bourdon gauge is used for measuring very high pressure such as the pressure of steam in a boiler or the pressure of compressed gases.
2) This movement is magnified by the lever arrangement which turns the cog-wheel that moves the pointer over a scale to indicate the pressure reading.

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