#$%^&*AU2011253534B220130627.pdf#####ABSTRACT The present invention relates to a sensor apparatus adapted to be used with extraction machinery such as dairy animal milking machinery. This extraction machinery normally includes a plurality of extraction elements such as teatcups between activator adapted to deliver an adapted fluid such as milk from two or more extraction elements into at least one collection line. The sensor apparatus provided in conjunction with the present invention can include at least one sensor associated with said at least one collection line and a controller adapted to control the activation of extraction elements. The controller is preferably configured to control the activation of extraction elements so that said at least one sensor is not exposed to the extracted fluid supplied from all extraction elements at any one time. An improved controller and extraction machinery adapted to implement the present invention is also disclosed. 26 298215.1 (GHMatters) P58573.AU.2- 0 - ---- - - iii- - - - - - - - - - - - - -C3 ck 0... , .. ... ....... CO--. 00 I EDI 640 =11 cn) E4) L - - - - - - - -
