OPB482P11Z

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OPB482P11Z is a three-pin, slot-type photointerrupter, composed of a gallium arsenide infrared emitter and an NPN silicon phototransistor, housed in a side-view package. This type of photointerrupter has many applications, mainly thanks to its core working principle. This article will look at its application field and working principle in more detail.

Application Field

OPB482P11Z is a photointerrupter with a high-speed response, making it ideal in optical sensing applications in the industrial and commercial sectors. Specifically, it is often used to detect whether a metal object is in place under the slot-type sensor. Industrial-grade applications for this photointerrupter include measurement and counting systems, sensing systems for automatic ranking tables, and general automation sensing solutions.

The OPB482P11Z is also suited for consumer-grade applications, such as usages in photoelectric switches, light barriers, safety shields, security systems, and lighting control systems. Due to its abilities with detecting metal objects, this type of photointerrupter does exceptionally well in automotive applications; specifically, it can detect whether an airbag is deployed in a vehicle or not.

Working Principle

The OPB482P11Z is a slot-type photointerrupter with a logic output, meaning the output is either an active high or active low signal. The sensing mechanism employed by this type of photointerrupter is simple and efficient - the gallium arsenide infrared emitter projects a beam of infrared light into the narrow slot of the photointerrupter. The NPN silicon phototransistor then converts the light signal into an electrical signal.

When a metal object is in place, the infrared light is blocked and the phototransistor acts as an open circuit, resulting in a lack of electrical signal. Conversely, when no metal object is present, the phototransistor acts as a closed circuit, allowing the electrical signal to pass through. The logic output on the OPB482P11Z is indicated by either an open (active low) or closed (active high) circuit. On models with a digital output, the logic output is a digital signal.

The OPB482P11Z can also detect the position of objects; with its speed response and narrow slot it can accurately measure the position of a moving object over a certain distance. This makes it a great choice for counting, measurement, and conversion applications. It has a wide voltage range, spanning between 3.2V and 20V so it can be used in a variety of applications.

Conclusion

The OPB482P11Z is a three-pin slot-type photointerrupter with a logic output, composed of a gallium arsenide infrared emitter and an NPN silicon phototransistor, housed in a side-view package. It is well-suited for both industrial and consumer-grade applications, and offers an efficient method of detecting and dimensioning metal objects. Its wide voltage range makes it possible to use it in a wide variety of applications, including measurement and counting systems, sensing systems for automatic ranking tables, security systems, and automotive airbag detection.

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