OPB920CZ

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Optical sensors are devices that detect light and then convert it into electrical signals. Photointerrupters are a type of optical sensor that uses an LED source to detect a moving object and to sense the presence of an object. Slot type photointerrupters are used when a wide sensing area is needed, such as in passing a fixtured item through a gap, or when the gap size varies. More specifically, the OPB920CZ optical sensor is a slot type photointerrupter that offers a transistor output.

The OPB920CZ consists of a transmitter and a receiver, both of which are housed inside a single package. The transmitter is composed of an IRED (infrared emitting diode) whereas the receiver is composed of a photo transistor. It is a slotted type photointerrupter because the suggested slot width and depth are 5.7mm x 1.3mm, respectively. Its collector to emitter voltage rating is 30V and its off-state current is 10uA max.

The OPB920CZ’s application fields are most notably used in printers and copiers, motor feed and fan controls, level control, sensing of end-of-sheet/end-of-web, and automatic document readers. Since it is a slotted type photointerrupter, the OPB920CZ can detect wide objects with different size specifications by allowing the object to pass through its slot without affecting the output. By varying the size of the slot, smaller or larger objects can be detected by the OPB920CZ.

The OPB920CZ is a slot type photointerrupter device that works by detecting the difference in light levels between the emitter (LED) and receiver (photo transistor). It works by emitting light through the LED which then bounces off of an object passing through its slot, causing the reflected light to be detected in the receiver. When the reflected light is detected in the receiver, the output signal is altered from its original state. This demodulation of the signal output is what allows it to detect objects of different sizes.

The OPB920CZ is not only compact and easy to use, but is also an ideal choice for low cost applications that require a low power supply. It works by modulating the output voltage when light is detected in its receiver. When the light is reflected off of an object passing through the slot at a certain intensity, the signal voltage is altered, thus allowing the device to detect when an object is present. The benefit of its transistor output is that it is capable of higher current output, making it ideal for low cost applications that require only a minimal output current.

The OPB920CZ optical sensor is a slot type photointerrupter that offers a transistor output. Due to its wide sensing area and low power requirements, this device is ideal for applications that require a low power output signal. Its application fields include level control, motor feed and fan control, end-of-sheet/end-of-web sensing, and automatic document readers. By modulating the output voltage when light is detected in its receiver, the OPB920CZ is able to detect the presence or absence of objects of different sizes that pass through its slot.

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