DT06234N Digital tachometer

Hi i would like to now what is THE strip that is used for detecting the beam?
I need to find what i can find to replace this strip from a normal schop
Any body can help me pleace thank you
Cderoose

You should really post your question here.
http://www.velleman.eu/support/contact/?product=371958

In short:
The strips are reflective.
They reflect the light beam back to the DTO6234N and counts the pulses.