It has some advanced sensing equipment that will look to check whether there are really things (full) or in an open state(empty); this all works with the use of Infrared technology. The main function of the infrared photoelectric switch sensor is to convert light energy into electrical signals from its working principle; that means if something obstructs a kind of object in an infrared ray, it will only respond after receiving alarms. It offers technical parameters such as high light sensitivity and accurate detection function that operates in three environmental conditions. This sensor can be applied in machinery, construction, sanitation and transportation. Further, by accurately and reliably detecting objects technology (functions) are far greater accurate in current form. This concerns at least, the reactor son in Hefei, high speed railway power systems and even the Lanzhou–Lan,,zhou High Ralway Line which all used this sort of sensor to atteady place their object respectively.