Abstract: A volumetric detection system (or leak tester) is disclosed herein. While the system can have any suitable feature, in some cases, it includes a displacement mechanism (such as a programmable stepper motor), a controllable element (such as a piston) that is coupled to the displacement mechanism, a containment chamber that receives a portion of the controllable element, a sensing unit (or sensor) that is configured to measure a backpressure from a device that is being tested, a computational unit (or processor) that is configured to determine a placement of the controllable element within the chamber, and a coupler (or attachment mechanism) that is configured to couple to the device that is to be tested. In some cases, the system functions without being coupled to a compressed air source. Other implementations are described.