Uson’s Optima vT leak and flow tester includes one or two test channels with four sensors each, customizable pneumatics, multiple built-in automated calculators, and data handling and storage options. The system uses two-channel eight-sensor technology. Various tests can be done in sequence, such as pressure decay followed by a series of flow tests in different ranges. Custom pneumatic configurations allow users to select best-match regulators, valves, and additional sensors plus a range of built-in automated calculators such as those used for temperature compensation or total leakage calculators that can eliminate needs for added test sequences. Key features include capabilities for vacuum decay tests, pressure decay leak testing, differential pressure decay leak tests, mass flow leak detection (including back pressure and differential), upstream and downstream cracking pressure, pressure rise tests, burst tests, laminar flow tests, force decay testing, and occlusion testing.