WFM30-40N321

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Optical Sensors are sensors used to detect optical signals of various ranges. Such devices are commonly used in various industries to detect the presence of objects in a certain area. One of the more commonly found type of optical sensor is the Photointerrupter which is an electrical switch operated by a beam of light. The WFM30-40N321 belongs to the Photointerrupter family and it is a Slot Type Transistor Output optical sensor. This article will discuss the application fields and working principle of the WFM30-40N321.

Applications

The WFM30-40N321 is an ideal device for industrial applications, especially for applications requiring object detection, counting, and rotation speed testing. The device can detect objects as small as 5.0 mm. This makes it ideal for various tasks such as detection of products on a conveyor belt or detecting the presence of coins in vending machines. It can also be used for applications such as high speed photocopiers or digital printers for reliable paper thickness detection. Other applications include detection of different kinds of printed patterns, presence of wear on resistors and capacitors, detection speed of disk drives, detection of various parts numbers, and collision detection.

Working Principle

The main components of the WFM30-40N321 include an infrared light emitting diode (LED) and a phototransistor. When the LED is on, the phototransistor will be turned off. The WFM30-40N321 detects the presence of objects that reach the light path between the LED and the phototransistor. When an object is present, the light path is broken and the phototransistor is turned on. This difference in the transistors on-off state is detected by the integrated circuit (IC) and the output transistor will be switched accordingly.

The WFM30-40N321 has an open-collector transistor output which can be connect to engines, relays or other electronic equipment with a suitable power supply voltage. This device is relatively easy to use and it can detect the presence of an object regardless of its size, however it can only be used for applications that require low speed or very short detection times.

Overall, the WFM30-40N321 is an ideal device for industrial applications requiring quick and reliable object detection. It is also relatively easy to use and has a low power consumption. The device’s ability to detect objects as small as 5.0mm makes it suitable for various tasks such as detection of coins in vending machines or the presence of printed patterns on paper.

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