A photoelectric sensor is a device that detects the presence, absence, or distance of an object by using a light transmitter (usually an infrared LED) and a receiver (photodetector). Here's a detailed look at the working principle of a photoelectric sensor: 1. Emission of Light: The sensor contains a light source, typically an LED, which emits a beam of light. This light can be visible or infrared. 2. Transmission of Light: The emitted light travels through the air towards the target area. The setup of the sensor can vary, resulting in different types of photoelectric sensors (through beam, retroreflective, and diffuse). 3. Detection Mechanism: Through Beam Sensor: In a through beam setup, the emitter and receiver are placed opposite each other. The light beam travels directly from the emitter to the receiver. When an object interrupts the beam, the sensor detects the change in light intensity and triggers an output signal. Retror
H ere's a concise explanation for each possible cause of lube oil found in the engine fuel: 1. Faulty Injector Cups: Worn or damaged injector cups can lead to lube oil from the engine's lubrication system seeping into the fuel system during injection, causing oil contamination in the fuel mixture. 2. Failed Fuel Injector Seals: Seals on the fuel injectors that have deteriorated or failed can allow lube oil to enter the fuel system, resulting in oil mixing with the fuel during injection. 3. Leaking Fuel Injector O-Rings: Damaged or worn O-rings on the fuel injectors can permit lube oil leakage into the fuel system, contributing to oil contamination of the fuel. 4. Fuel System Contamination: Contaminated fuel or debris within the fuel system can mix with lube oil, leading to oil contamination of the fuel supply that enters the engine. 5. Faulty Fuel Pump Seals: Worn or damaged seals within the fuel pump can enable lube oil to mix with the fuel during pumping, c