OPB481T11

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Optical sensors are devices that detect a change in the optical property of light, such as intensity, wavelength, or polarization, and then convert the information into a signal that can be processed by other components in an electronic system. Photointerrupters are opto-electronic components that detect the presence or passage of an object, usually a paper or metal target, and then use this information to switch a circuit on or off. Slot type photointerrupters consist of a slot (usually an LED emitter) in one part of the component, and a phototransistor detector in the other part. The OPB481T11 is a slot type photointerrupter with a logic output.

The OPB481T11 consists of an LED emitter and a phototransistor detector with built-in shielding. The component is rated for a supply voltage of 4.5V-24V, and it has a current rating of 5mA for the LED emitter and a current limiting resistance of 1k ohm for the phototransistor detector. The device has a slot size of 5mm and the emitter and detector parts are separated by an opaque housing. The component is highly resistant to external noise sources, and it also has a built-in logic circuit that can detect the state of the optical slot, providing output switching between high and low logic states. This feature allows the component to be used as a basic switch, controlling the on/off state of a circuit, without requiring a connection from the detector to the logic circuit.

The working principle of the OPB481T11 is based on the opto-coupling effect. When an object passes through the slot of the component, it interrupts the light beam from the LED emitter and blocks the light from passing to the phototransistor detector. This interruption in the light causes the voltage across the emitter and detector to change, triggering a current flow in the phototransistor. This current activates the logic circuit and causes the logic output to switch from "high" to "low" or from "low" to "high".

The OPB481T11 is mainly used in life science, medical, and industrial automation applications. It can be used to detect the presence of a paper or metal target within a certain range, and output a logic signal when the object is detected. This signal can then be used to switch on a circuit or indicate the presence of the object. The component is also used in mechanical sensing applications, such as detecting the passage of an object in a production line. It can also be used to detect the presence of a person in a restricted area, or to detect objects in a surveillance system.

The OPB481T11 is a reliable, cost-effective opto-electronic component that offers a wide range of applications. It is a simple, yet effective device for sensing the presence or passage of an object, and it can be used in a variety of applications where input from a sensor or switch is required. This component is ideal for use in automation projects, life science applications, and for providing basic switching functionality.

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