Braun piston dosing pump, model PM0159, with a delivery rate of 0.22mL/rev, with a reed sensor that gives a signal with each revolution of the shaft, driven by a stepper motor with a pitch of 1.8* and a current of 0.22A. The piston and pump cylinder are made of ceramic, the rest of the housing is most likely made of Teflon. Pumping is done with thinner connectors visible in the pictures, while thicker connectors are used to collect possible leaks from the pump and at the same time improve lubrication of the piston. The pump has been tested and is fully operational