EVVA ELUS cylinder

I recently acquired an EVVA cylinder stamped “ELUS”. Nothing could be found about it, so I decided to investigate it.

Looking at this picture, it looks pretty standard. It is a variation of the EVVA NL system, which is inself is a variation of the TSC system. The NL is a 5-pin cylinder with multiple possible key profiles and with master keying in the bitting.

But: this system has additional electronics attached to it:

The electronics implement a Temporary Access Function, similar to that in the EVVA ICS TAF cylinder, invented around 25 years later than this. It was an invention of EVVA Netherlands with one of their partners, but it never reached production.

Read more about it in the paper Ive written about it.


One Response to “EVVA ELUS cylinder”

  1. Jan-Willem says:

    Thanks for the writeup, Walter. This is a very interesting application of electronics in mechanical locks.