WFM120-120P321

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Optical sensors are primarily used for detecting the presence or absence of an object in a particular area. This type of sensors works on a simple principle of interruption of a beam of light that passes over the sensing area of the detector. Photointerrupters, in particular, work on the basis of the interrupting a light beam in order to produce an output signal. The WFM120-120P321 photointerrupter, of the slot type Transistor Output category, falls within this group of devices and fulfills a specific purpose for a wide variety of applications.

The WFM120-120P321 photointerrupter is designed to be used as an electronic detection device in industrial and consumer applications. This device is an inexpensive, non-contact solution that works by either using two infrared LED transmitters and a phototransistor receiver, or using just a single infrared LED light for both transmitting and receiving. The WFM120-120P321 is operated with an AC or DC voltage of 5-24 V. It is also available in both surface mount and through hole versions.

In the operating principle, the infrared light beam from the transmitting LED is directed across the cavity in the plastic housing and is received by the other LED on the opposite side of the housing. When an object or material interrupts the light beam, the receiver LED does not detect the light and a signal indicating a change of state is sent. The signal is then sent to a controller or a processor, which then triggers a desired action based on the received signal.

The WFM120-120P321 photointerrupter is able to detect objects up to an impressive distance of 10mm, making it highly suitable for a wide range of industrial and consumer applications. In industrial applications, the device can be used for the detection of power supplies in a range of electric appliances, such as TVs, air conditioners, and refrigerators; in this case an interrupt in the beam triggers the switching on of the appliance. In consumer applications, the WFM120-120P321 photointerrupter can be used in gaming machines, vending machines, optical disc drives, and CD-ROM players, again triggering an action when an object interrupts the beam.

In other automotive and manufacturing applications, the WFM120-120P321 photointerrupter can be used to detect the presence of a fired pin, move a solenoid, detect a door opening, or monitor points in an automated production line. Through the simple principle of interruption of a light beam, the WFM120-120P321 photointerrupter provides a reliable and cost-effective detection device for a variety of applications.

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