Final answer:
The safe pressure for leak testing is determined using a pressure gauge, a device designed to measure and monitor system pressures and this ensures that the test is conducted safely within the appropriate pressure limits.
Step-by-step explanation:
To determine the safe pressure for leak testing, one should use a pressure gauge. Pressure gauges, such as mechanical pressure gauges, manometers, and ionization gauges, are all devices designed to measure and monitor pressure in various systems. They serve important roles in many applications including industrial, medical, and automotive contexts. For instance, mechanical pressure gauges convert pressure into a readable format via mechanical movements. An aneroid gauge, which uses flexible bellows connected to a mechanical indicator, is one type of mechanical pressure gauge. Ionization gauges are used to monitor the pressure of gases in enclosed systems by ionizing gas molecules and measuring the ensuing current as a proxy for pressure. These gauges allow for careful calibration to ensure the safe application of pressures without surpassing the intended limits.
When performing leak testing, the selected pressure gauge should be appropriate for the range of pressures expected in the test to ensure the accuracy and safety of the procedure. It should also be noted that devices such as pressure relief valves and pressure regulators are additional components often used in conjunction with pressure gauges to control and maintain desired pressure levels efficiently and safely within a system.