SED-MCY-A — Sealing Tester / Leak Tester

Sample is placed inside the acrylic transparent vacuum tank with water around it (water level ~10 mm above the perforated press plate). The instrument evacuates the tank via either a compressed-air-driven Venturi vacuum generator (compressor version) or an external rotary-vane vacuum pump (vacuum-pump version). When the tank pressure reaches the set negative pressure ±accuracy band, the pump cycles off; if pressure rises above the band, the pump kicks back in. Sealed packaging in the water has higher internal pressure than the surrounding tank — leaks emit a stream of bubbles visible through the acrylic. After the user-set hold time elapses (1–9999 s), the instrument automatically opens the relief solenoid valve, returning tank pressure to atmospheric.