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what is working principle of presure and temperature guage?
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Answer Posted / mian hassan
Most standard dial type pressure gauges use a bourdon tube-
sensing element generally made of a copper alloy (brass) or
stainless steel for measuring pressures 15 PSI and above.
Bourdon tube gauges are widely used in all branches of
industry to measure pressure and vacuum. The construction
is simple yet rugged and operation does not require any
additional power source. The C-shaped or spirally wound
bourdon tube flexes when pressure is applied producing a
rotational movement, which in turn causes the pointer to
indicate the measured pressure. These gauges are generally
suitable for all clean and non-clogging liquids and gaseous
media. Low pressure gauges typically use an extremely
sensitive and highly accurate capsule design for measuring
gaseous media from as low as 15 INWC to 240 INWC (10 PSI).
Digital gauges use an electronic pressure sensor to measure
the pressure and then transmit it to a digital display
readout.
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