OPB881T51

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OPB881T51 is an optical sensor in the Photointerrupters - Slot Type - Transistor Output category. It is a type of photoelectric sensor used to detect the presence of objects that obstruct the transmission of light. The sensor consists of an infrared light-emitting diode and a phototransistor. The object that obstructs the light will cause a change in the voltage at the output of the phototransistor.

Application Field

The OPB881T51 sensor is used in many applications, including industrial, automotive, medical and consumer applications. The most popular uses include detection of paper jams in printers, interruption of power strips, in-line sensing of web speed, detection of breaks in conveyor lines, and for presence detection of moving objects. The output of the OPB881T51 can be used for signaling or control.

Working Principle

The underlying working principle of the OPB881T51 is the absorption and reflection of a beam of infra-red light. When the beam of infra-red light hits an object, some of it is absorbed and some of it is reflected back. The amount of light reflected back is dependent on the type and color of the object. The phototransistor in the sensor measures the amount of reflected light. Based on this measurement, the sensor is able to make a determination of the presence or absence of an object.

The OPB881T51 sensor is a transmissive type optical sensor which means it sends out a beam of infra-red light that is modulated and that can be switched on and off several times a second. The sensor is able to detect objects due to the accurate modulation of the light beam. When an object passes in front of the light beam, the reflected light is detected and the sensor signals an output. In applications, the OPB881T51 is usually used in pairs, so it is able to detect the presence of an object between two sensors.

Conclusion

The OPB881T51 optical sensor is an efficient and reliable device used in many applications where objects need to be detected accurately and quickly. The working principle of the device is based on the absorption and reflection of infra-red light. The output can be used for signaling or control to indicate the presence of objects or to enable the automation of certain processes. In conclusion, the OPB881T51 is an effective sensor that can be used in a variety of applications.

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