OPB890L51

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Optical sensors are sensors that use light to detect changes in the environment. Phototransistors, also known as photointerrupters, are one type of optical sensor typically used in industrial applications. The OPB890L51 is a specifically designed transistor output slot type photointerrupter. This article explores the applications and working principles of this device.

Applications

The OPB890L51 transistor output photointerrupter is a standard integrated optical device designed to sense the presence and absence of a metal object or other material passing through the slot. It is used for applications such as object tracking, door safety sensors, distance measurements, motor speed and position, and edge detection. This device offers a reliable solution with a high current output for a variety of switch and motion control applications.

Working Principle

The working principle of the transistor output photointerrupter for this device is based on the switching of a light beam within the slot. The light beam is generated by an infrared LED and focused onto a phototransistor through a lens. The infrared LED is constantly ON, and the phototransistor is in an OFF state when the light beam is not interrupted. When the object or material passes through the slot and interrupts the light beam, the phototransistor switches ON and generates an output based on the amount of light received. The output signal is amplified by an external transistor (a static component) and is then used to trigger a circuit, which is typically a relay or a motor.

Advantages

The OPB890L51 photointerrupter has many advantages when compared to other optical sensors. It is able to detect objects of various shapes and sizes, has a wide operating temperature range, and is able to withstand vibrations, shocks, and impacts. Additionally, it has a low power consumption, long life cycle, and is immune from interference caused by dust, dirt, oil, moisture, and other contaminants.

Conclusion

The OPB890L51 is a practical and reliable solution for applications requiring the detection of metal objects or other materials. Its transistor output feature provides a high current output, making it ideal for switch and motion control applications. The device is capable of withstanding environmental challenges while delivering reliable performance. The cost-effective design is conducive for multiple deployments and its fast response time ensures reliable and accurate results. By utilizing the operating principles of phototransistors, the OPB890L51 is able to change states and send accurate signals to other components or systems, making it an attractive option for a variety of industrial applications.

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