Peristaltic pump

This peristaltic pump has been made as small as possible to inject small quatities of test solution on command.

It has been tested with this tubing.
https://www.amazon.com/gp/product/B09V5QHMXS/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

3 x 5 mm surgical tubing.

The bearings 8 x 12 x 3.5mm were stacked to give the needed height. A little silicon on the outside where the tubing enters will prevent it from walking in or out of the pump.

Cheers
Kisssys