Fluid sensing device and method for use in particular in milking machines

摘要

The present invention relates to a device (1) for sensing the composition of a fluid (7). The device (1) comprises a container (5) for the fluid (7) and a light source (3) and light detecting means (9) positioned on opposite sides of the container (5). The amount of light detected by the light detecting means (3) is dependent on the composition of the fluid (7).