Safety Sensors is a general term attributed to the sensors used for detection of distance, absence or presence of any object in a restricted zone during physical operations. The Safety Sensors are also denoted as Photo Electric/Opto-Electronic Sensors as they are based on the photoelectric principle of using electromagnetic waves viz, electric, magnetic and light. The safety sensors are present either in the form of sensors, switches or buttons. In this report, we covered the safety sensors and switches classification by product types for manufacturing and processing industries: opto-electronic/ photo electric devices, presence detection sensors, safety switches, safety command devices and classification by product types for automobiles: collision avoidance, obstacle avoidance, lighting and wiper control. They are widely used in aircraft and aerospace, automobile, chemical, food and beverage, machine and tools, material handling, mining, oil and gas industries and so on.