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OPB871P55 application field and working principle

The OPB870P55 Optical Slot Type Photointerrupter designed by Optek is capable of sensing wide range of objects. It offers a simple yet robust design which caters to the needs of a wide range of fields including automotive, consumer electronic, industrial, medical and other applications. The device operates over a wide voltage input range of 4V to 24V and is reverse-polarity protected. It is also capable of sensing objects of varying curvature using the varying gap between the sensing slots. The OPB870P55 consists of an optically sensitive slot and a photo-transistor which is designed to activate when light reaches it.

Working Principle

When light enters the optically sensitive slot of the OPB870P55, it is interrupted by the presence of the object. This interruption triggers the photo-transistor to activate and release a current, completing the circuit. This current, after amplification, is converted into a digital output, which essentially is used to indicate presence or absence of an object. The OPB870P55 is encased in a robust ABS package and is also available with an integrated LED in order to confirm the activation of the sensor.

Application Field

The OPB870P55 is widely used in both digital and analog applications. It is used for sensing objects in microelectronic circuits, controlling switch operations, detecting coins in vending machines, and monitoring safety systems in industrial environments. The device requires minimal maintenance and setup and is able to detect and sense objects of varying shape and size, making it a highly versatile device.

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