They safely detect glass, film, PET bottles or transparent packaging and can be used for counting bottles or glasses or monitoring film for tear. Hence, they are mainly used in the food, beverage, and pharmaceutical industries. The sensors operate with visible red light. Variations in target shape, size, material, color, and translucence can complicate accurate detection. For example, the light from the sensor can burn through a target or be reflected away erratically. Additionally, the harsh, hazardous, washdown and aseptic. Sensors for the detection of transparent objects Sensors for the detection of transparent objects Solutions for a world of clear materials SenSorS for the detection of tranSparent objectS | SicK 8015319/2012-07-10 Subject to change without notice 2 Living in a clear material world. The detection of transparent objects can often be a real challenge due to their light transmission. Different technologies may work better under certain conditions or may prove more effective for specific materials. A photoelectric sensor is a small electronic device and a key. Optical sensors are devices that use light to detect the presence of an object, in addition to detecting its shape, color, distance and thickness.