A filament sensor for Orbiter 1.5 already existed but I didn't want to wait for shipments, so I set to work with a few components I had available:

• a limit switch;
• a 6mm diameter bulk bearing;
• two M2x10mm screws;
• a couple of cables for connection;
• one pneumatic connector ECAS04;

or:

• one M5x5.8x7.1 brass insert;
• a PC-4 M6 pneumatic connector;

Print it upside down add a backing at the hole for the pneumatic fitting, I used PETG.

there are three versions, a version for Orbiter 1.5 with thread directly in plastic, a version for Orbiter 1.5 with thread with brass insert of two versions one with ECAS 04 and one with PC-4 M6