Abstract: A combination milk flow sensing and vacuum shut-off device comprises a housing defining a milk flow cavity with an inlet port through which milk can flow in freely as it comes from the teat cups and an outlet port of sufficient size such that milk can flow freely out of the milk flow cavity and not accumulate therein; a plunger within the milk flow cavity is suspended by means of a stem extending out of the cavity and attached to and operated by an air pressure cylinder piston unit in such a relationship that the piston unit drives the stem and plunger vertically within the milk flow cavity so that the cut-off plunger may engage with the seat of the milk flow outlet port to cut off milking vacuum or to disengage the seat of the port to admit vacuum; a milking sensor pedal is provided within the cavity and suspended directly beneath the inlet port by means of a pedal shaft extending through the wall of the cavity to support the pedal. The pedal shaft is pivotally mounted.