PM-K25-P

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Photointerrupters are optical sensors used to detect the presence or absence of an object, or to measure its speed. Slot-type photointerrupters have an encoder wheel with slots that act as a shutter. When light enters the sensing element, it produces a logic level output, depending on the particular part. The PM-K25-P is a slot-type photointerrupter with a logic output.

The PM-K25-P consists of an infrared-emitting diode (IRED), an integrated optical filter, and a phototransistor, all housed inside a plastic, DIP package. It has a 0.75mm slot, allowing a maximum of 25mm, allowing its use in various applications. The main features of the PM-K25-P include reliable high-speed switching, low power consumption, wide input voltage range, and improved noise resistance.

Application Field and Working Principle of PM-K25-P

The PM-K25-P is used in applications such as rotational speed measurement, pulse counting, position measurement, and material handling. It is also used in computers, copiers, and office machines, as well as in textiles and precision machinery. It can be used in various types of ESD resistance applications.

The working principle of the PM-K25-P relies on the infrared light passing through the slot, and when it does, the phototransistor emits a logic level output. When no light passes through, the output state is low, and when light passes through, the output state is high. The decision is made depending on whether the slot is open or closed. If the slot is open, the phototransistor will not be able to detect the infrared light, and so the output remains low. On the other hand, if the slot is closed, then the output will remain high, and this can be used as an indication of the presence or absence of an object.

Advantages and Limitations of PM-K25-P

The PM-K25-P has some great advantages which makes it suitable for many different applications. It boasts a low-power consumption, which means it does not require much power to operate. It also provides excellent resistance to noise. This helps to ensure that the output of the photointerrupter remains accurate and that it is not affected by electromagnetic interference.

However, one of the main limitations of the PM-K25-P is its size. As it is a small package, it cannot fit many components which could be required in some larger applications. In these cases, a larger package may be needed.

Conclusion

The PM-K25-P is a slot-type photointerrupter with a logic output, commonly used in applications such as rotational speed measurement, pulse counting, position measurement, and material handling. Its main features include reliable high-speed switching, low power consumption, wide input voltage range, and improved noise resistance. Despite its size, it offers a great advantage as it is low power and has excellent noise resistance. Photointerrupters are an essential part of the industrial automation sector and this particular model is a great way to go about achieving precise, efficient, and reliable results.

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