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The fibre-optic cable for measuring liquid levels detects the level of almost any liquid. Whereby it is irrelevant whether the liquid is clear or opaque. The detection principle is based on the differing refractive indices of air and liquids. There is a large difference between the refractive index of the plastic and the air when the tip of the sensor is in the air. The light beam is completely reflected and returned to the receiver. The difference in the refractive index of plastic and liquid is, however, considerably smaller when the tip of the sensor is in the liquid. The majority of the light beam is then absorbed by the liquidand only a very small amount of light returns to the receiver. The level of the liquid is thus determined.

Fibre-optic cable LL3-DF02 Detection of a liquid level


 Measures almost all liquids


 Precise and flexible measurement, particularly in small containers


 such as beverages bottles


 Teach-in via adjustment button or external input


 Binary outputs

WLL190T-2


 Simple operation startup and product change thanks to external teach input


 Simple monitoring of target and actual values thanks to 2 x 4-place digital display


 Switching reliability with fast workflows thanks to short response times


 Reduced wiring work thanks to wire-saving in bus operation


 APC for long-term, stable detection