This simple to install and reliable LX (Latch Monitoring) switch kit is made by Marray specifically for the Von Duprin 99 and 33 series exit devices. Switch is SPDT UL listed component. Compare our price to the Von Duprin original factory part price and you will see a big difference. 

All parts are stainless steel for long life.

Switch is rolller type, for wear resistance.

Switch comes with screws and instructions.

What does an LX switch do?

Provides a switch to indicate whether or not the latch is extended in a panic bar, instead of riding on the latch plate. Used for accurately reporting the door status and latching condition.