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Pressure GaugePressure gauges are mechanical instruments that are often read manually and are rather affordable.A thin-walled metal tube that is normally threaded into the compartment where pressure is being monitored is part of Bourdon gauges. The tube starts to straighten as the pressure inside it rises. A lever system with a pointer is on the tube's other end. The pointer rotates around a dial, displaying pressure in pounds per square inch, as the tube straightens (PSI). Curved or C-shaped, spiral, and helical tubes are typical tu... more
