Abstract: An inlet includes a bottom assembly and a top assembly. The bottom assembly includes at least one male unit, and the top assembly has at least one beveled surface and includes at least one female unit and a lateral driving unit. The top assembly is placed inside the bottom assembly by aligning the female unit of the top assembly with the male unit of the bottom assembly. The lateral driving unit laterally drives the top assembly and causes the beveled surface of the top assembly to rise against the male unit of the bottom assembly, allowing the top assembly to seal with the bottom assembly.

Abstract: An analytical instrument includes an instrument body having a multiple external-device interfaces for connection with external devices, and a housing that covers the instrument body. The housing includes a housing panel having a first opening exposing the external-device interfaces and a plug structure having a first plug and a second plug. The first plug rotatably fits into the first opening and includes a second opening that exposes one of the external-device interfaces. The second plug is smaller than the first plug and is removably fitted into the second opening to close the second opening when no external device is connected to any of the external-device interfaces. When an external device is to connect to one of the external-device interfaces, the second plug is removed from the second opening and the first plug is rotated to expose the intended one of the external-device interface through the second opening.

Abstract: An inlet includes a bottom assembly and a top assembly. The bottom assembly includes at least one male unit, and the top assembly has at least one beveled surface and includes at least one female unit and a lateral driving unit. The top assembly is placed inside the bottom assembly by aligning the female unit of the top assembly with the male unit of the bottom assembly. The lateral driving unit laterally drives the top assembly and causes the beveled surface of the top assembly to rise against the male unit of the bottom assembly, allowing the top assembly to seal with the bottom assembly.