As a plunger mechanism pushes the septum forward, a bypass in the glass barrel allows a fluid in one chamber to flow into an adjacent chamber.

The versatility of knurled press-fit plungers extends across numerous industries, where they have been adopted for tasks such as positioning, securing, indexing, locating and detent. Here is a closer ...

and at its heart is a mechanism that works a lot like that of a retractable ballpoint pen. Every click of the plunger spins the circular label inside by one-quarter of a rotation. In [u407]’s ...