OPB981L51 Encyclopedia Entry

Product Overview

The OPB981L51 is a photo interrupter sensor designed for use in various electronic and mechanical applications. This sensor falls under the category of optoelectronic devices and is commonly used for detecting the presence or absence of an object, position sensing, and speed measurement. The characteristics of the OPB981L51 include its compact size, high sensitivity, and reliable performance. It is typically packaged in a small housing with an infrared LED emitter and phototransistor receiver. The essence of this sensor lies in its ability to accurately detect interruptions in the emitted light beam. The standard packaging includes individual sensors or sets, and the quantity may vary based on the manufacturer's specifications.

Specifications

• Operating Voltage: 5V DC
• Output Type: Phototransistor
• Sensing Distance: Up to 10mm
• Operating Temperature Range: -40°C to 85°C
• Package Type: Through-Hole
• Dimensions: 7.0mm x 4.0mm x 2.5mm

Detailed Pin Configuration

The OPB981L51 sensor has a total of four pins: 1. VCC (Power Supply) 2. GND (Ground) 3. Signal Output 4. N/C (Not Connected)

Functional Features

• Reliable Object Detection: The sensor provides consistent and accurate detection of objects passing through the light beam.
• Compact Design: Its small form factor allows for easy integration into various electronic and mechanical systems.
• Wide Operating Temperature Range: The sensor can function effectively in extreme temperature conditions, making it suitable for diverse environments.

Advantages and Disadvantages

Advantages

• High Sensitivity: The sensor can detect even small interruptions in the light beam.
• Versatile Applications: It can be used in a wide range of applications, from simple object detection to complex position sensing tasks.

Disadvantages

• Limited Sensing Distance: The maximum sensing distance of 10mm may not be sufficient for certain applications requiring longer detection ranges.

Working Principles

The OPB981L51 operates based on the interruption of the infrared light beam emitted by the internal LED. When an object obstructs the light path, the phototransistor detects the change in light intensity and generates an output signal, indicating the presence of the object.

Detailed Application Field Plans

The OPB981L51 sensor finds extensive use in various fields, including: - Industrial Automation: Used for detecting the presence of components on assembly lines and conveyor belts. - Robotics: Employed for precise positioning and obstacle detection in robotic systems. - Automotive: Integrated into vehicle systems for speed and position sensing applications.

Detailed and Complete Alternative Models

Some alternative models to the OPB981L51 sensor include: - OPB9000 Series: Offers similar functionality with enhanced features such as adjustable sensing distances. - TCST2103: Provides comparable performance in a different package type, suitable for specific mounting requirements.

In conclusion, the OPB981L51 photo interrupter sensor serves as a reliable and versatile component in electronic and mechanical systems, offering precise object detection and position sensing capabilities across various applications.

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