Abstract: A sensor apparatus to be used with extraction machinery (2), said extraction machinery (2) including a plurality of extraction elements which when activated are adapted to deliver an extracted fluid from two or more extraction elements into a common collection line (3). The sensor apparatus including at least one sensor (4a/4b) positioned in the common collection line (3), and at least one controller (6) adapted to control the activation of said extraction elements, whereby activation of said extraction elements is controlled to prevent said at least one sensor (4a/4b) being exposed to extracted fluid supplied from all of said extraction elements at any one time.

Abstract: A sensor apparatus to be used with extraction machinery (2), said extraction machinery (2) including a plurality extraction elements which when activated are adapted to deliver an exravted fluid from two or more extraction elements into a common collection line (3). The sensor apparatus including at least one sensor (4a/4b) positioned in the common collection line (3), and at least one controller (6) adapted to control the activation of said extraction elements, whereby activation of said extraction elements is controlled to prevent said at least one sensor (4a/4b) being exposed to extracted fluid supplied from all of said extraction elements at any one time.

Abstract: A milking system combines the use of a thin-walled non-distensible floppy liner (82) with the application of positive pressure during the off portion of the milking cycle, and overcomes prior problems of congestion, oedema, hyperkeratosis, and slow milking. In a further aspect, the thin-walled floppy liner is operated as a pressure switch limiting the amount of negative pressure applied to the lower tip of the teat (16). In a further aspect, cross-contamination from another teat through the milking claw (36) is reduced by minimizing volume change within the liner (82) below the teat (16) during milking.