Optical, opto-electronic and photoelectric sensors for sensing light and light reflected by objects; ultrasound sensors for sensing magnetic, inductive and capacitive sensors for sensing the presence of objects; color sensors; optical, opto-electronic, photoelectric, ultrasound, magnetic, inductive, capacitive and/or color sensors for the purpose of automatic inspection, for the purpose of the inspection of plain or web-like materials, for the purpose of checking the characteristics of such materials, for the purpose of fault recognition, for the purpose of recognition of color, shape, position, contour, volume, distance, texture or surface characteristics of articles, for the purpose of automatic identification, quality control, positioning, handling and control of articles, and for the purpose of automation in the fields of manufacture, quality control, storage, flow of goods, sales, transport, laboratory, plants, traffic, installations and public buildings; electronic and/or optical sensors for the purpose of measuring a position or length or distance; optical sensors for angle and distance measurements; magnetic sensors for angle and distance measurements; cameras for automatic engineering industrial control sensors, namely, optical, electronic, opto-electronic, photo-electrical, magnetic, inductive and capacitive sensors for use in monitoring the composition of gases and liquids and for monitoring meter levels and flows in industrial processes; control devices, liquid and gas level monitors, namely, for level monitoring in supply tanks and storage silos; computer programs for sensor operation; temperature sensors, timing sensors and pressure sensors