4M Retro-Reflective Photoelectric Sensor | Bracket Included | E3Z-B61 NPN/PNP

The GTRIC E3Z-B61 is a retro-reflective sensor with a long detection range. It sends a light beam to a reflector. It then senses anything that passes between them. Its 4-meter range makes it good for factory automation. Features and Benefits - Retro-reflective sensing up to 4m - You get a long, clear detection zone. You only need wiring on one side, unlike through-beam systems. - Combined NPN and PNP outputs - This sensor has both output types. It connects to almost any modern PLC or controller. - Designed for clear object detection - Its optics are set up to reliably sense clear materials. These include plastic film, glass jars, and PET bottles. - Compact square body with bracket - The small case fits easily into tight machine spaces. The included mounting bracket makes setup and alignment easier. Applications - Counting clear bottles or containers on a beverage filling line. - Finding boxes and packages on logistics conveyor systems. - Confirming parts are in place before a stamping or cutting process. How They Work A photoelectric sensor, also known as an optical sensor or light sensor, detects the presence or absence of an object by emitting a light beam and measuring the change in the received light. This particular model, a 4M Retro-Reflective Photoelectric Sensor, operates by sending out a light beam which then reflects off a specialised reflector (not included). When an object breaks this beam, the sensor registers the change and triggers an output. It is designed for reliable detection over a 4-meter sensing distance. 3 Main Types of Photoelectric Sensors There are three primary types of photoelectric sensors. Through-beam sensors have a separate emitter and receiver, providing a long sensing distance. Diffuse-reflective sensors have the emitter and receiver in one unit and detect objects by the light reflected directly off the object itself. Retro-reflective sensors, like this E3Z-B61 model, also combine the emitter and receiver, but they rely on a reflector to bounce the light back. An object is detected when it interrupts the beam between the sensor and the reflector. Common Applications Photoelectric sensors are versatile tools used in various industrial and commercial settings. Their ability to detect objects without physical contact makes them ideal for tasks such as counting items on a conveyor belt, verifying product presence, or monitoring fill levels. This 4M Retro-Reflective Photoelectric Sensor, with its 4-meter sensing distance, is suitable for applications requiring detection over a moderate range, such as controlling automated machinery or security systems. Its square shape and included bracket facilitate easy mounting. The Core Components Every photoelectric sensor consists of a few essential components. At its heart is a light emitter, typically an LED, which sends out a light beam. A receiver, usually a phototransistor or photodiode, detects this light. The E3Z-B61 model integrates both the emitter and receiver into a single unit. A lens system focuses the light beam and ensures efficient detection. Finally, an output circuit processes the received light signal and generates an electrical output, in this case, NPN or PNP, indicating the presence or absence of an object. The 3 Main Operating Modes Photoelectric sensors generally operate in three main modes. Light-ON mode means the output is active when light is detected by the receiver. Dark-ON mode means the output is active when no light is detected. Some sensors offer selectable Light-ON/Dark-ON operation. This 4M Retro-Reflective Photoelectric Sensor with its NPN/PNP output can be configured to suit specific application requirements, providing flexibility in how the sensor reacts to an object interrupting the light beam.