Schaltbau are proud to be supporting Vivarail with their innovative Class 230 trains by supplying a range of switches, contactors and train controls.

In addition to standard parts, Schaltbau have re-engineered the door latch assembly to replace an obsolete mercury tilt switch with a new compact, reliable and cost effective snap action switch.

This has involved removal of the original Metro-Cammell designed door latch assembly, disassembly in a controlled way and then safe disposal of the potentially harmful mercury tilt switch.
source= https://railway-news.com/schaltbau-re-engineered-door-latch-vivarail/