water counter sensor holder

This is a holder for one 5mm-LED and one 3mm photo transistor, arranged such, that a mirrow in 3mm distance below the base plate will cause maximum reflexion. I use this to detect the rotating mirror on a water counter; to measure the water consumption rate.

The design is improved for a standard analog water counter (by HamburgEnergy).
(File: Wasserzaehler-sensor2.stl). I also made a generic Design (5mm LED + 5mm photodiode) with a separate holder flange. (files: Wasserzaehler-halter.stl a