Sensing arrangement

A sensing arrangement (11) for sensing objects at a plurality of sensing sites (64) is described herein. In one embodiment the arrangement comprises: an imaging device (60) having an array of light-detecting elements; a light guide arrangement (62) extending from the sensing sites (64) to the imaging device (60); a mount (79) for maintaining the light guide arrangement (62) and the imaging device (60) in a fixed spatial relation so that each sensing site (64) illuminates a zone (60a,b) of different elements on the array; and a processor (72), in communication with the imaging device (60), for analysing image data captured by each zone. A method of sensing an object is also described herein.