Exploring the World of Pressure Gauges

What is the function of a compound pressure gauge in a system?

A. Measures absolute pressure
B. Measures gauge pressure
C. Measures differential pressure
D. Measures vacuum pressure

Answer:

B. Measures gauge pressure

Pressure gauges play a crucial role in numerous systems across various industries. A compound pressure gauge, specifically designed for the low side of a system, is used to measure gauge pressure. Gauge pressure is the pressure relative to atmospheric pressure, typically positive when above atmospheric pressure and negative when below it, indicating a vacuum or suction condition.

Unlike absolute pressure, which considers atmospheric pressure in its measurements, gauge pressure ignores atmospheric pressure and focuses solely on the pressure exerted by the system. This makes compound pressure gauges essential for accurately monitoring pressure levels in applications where vacuum or suction conditions are common.

Other types of pressure-measuring devices, such as manometers and aneroid gauges, serve different purposes but are equally valuable in specific contexts. Understanding the function of each gauge and its role in a system is key to maintaining optimal performance and safety.