What is mean by dead weight pressure gauge tester?

A dead weight pressure gauge tester is a calibration device used to measure and verify the accuracy of pressure gauges and sensors. It operates on the principle of balancing a known weight against the pressure exerted by a fluid, allowing for precise control and measurement of pressure. By using calibrated weights and a piston-cylinder arrangement, it provides a reliable method for ensuring that pressure gauges provide accurate readings. This tool is essential in various industries to maintain equipment reliability and safety.