QVB21214

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Optical Sensors consist of two parts, the optical part and the electric part. The optical part consists of a light source, a convex lens or an array of fibers, and a photodiode or other optoelectronic devices, such as a phototransistor. The electric part consists of an amplifier and a voltage or current output device. The electric and optical parts are linked together with conductors, choosing the appropriate type for the application.

QVB21214

QVB21214 is a slot type type photointerrupter that provides a transistor output. This photointerrupter is composed of an infrared emitting diode and a phototransistor, located within a plastic housing and isolated from each other. It is designed for high-density mounting applications on densely packed circuit boards. QVB21214 has a 3mm through-hole mounting and a rail-type construction in order to simplify the design of the application by allowing a simple connection between the photointerrupter and the board. The photointerrupter can detect when a light beam is interrupted, providing a transistor output for the detection of objects, and it can also be used as an optical switch by providing an automatic switching function.

Application Field

The QVB21214 photointerrupter can be used in applications such as retail and manufacturing automation, medical and industrial safety, motor control, and consumer goods. It can also be used to detect objects in continuous or intermittent motion. In particular, the QVB21214 is ideal for applications where space is at a premium and critical components are close together. Its ability to detect when a light beam is interrupted makes it well suited for tasks such as detecting the movement of motor parts, counting the number of items in a container, or detecting objects in high-speed production lines. The device can also be used as a limit switch in various applications, such as controlling machinery and production lines.

Working principle

The QVB21214 photointerrupter has a pair of, an infrared diode and phototransistor, which are coupled together and are separated by an air gap. In this device, the infrared diode emits a light beam, which is directed toward the phototransistor. The phototransistor, in turn, detects the light beam and generates a high voltage when it is illuminated. When the light beam is interrupted by an object passing through the gap between the two components, the phototransistor will no longer be able to detect the light beam and the output voltage will drop.

The photointerrupter has a 3mm through hole for easy mounting. The rail type construction allows a simple connection between the photinterrupter and the board. The QVB21214 photinterrupter also has a built-in circuit protection designed to prevent unexpected output behavior.

In conclusion, the QVB21214 is a slot type photointerrupter that provides a transistor output. It is ideal for applications where space is at a premium and critical components are close together. This device can be used to detect objects in continuous or intermittent motion, as well as for switch applications. The device has a 3mm through-hole mounting, rail-type construction, and built-in circuit protection to ensure reliable operation.

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