H21B3

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The H21B3 application field and working principle fall into the category of optical sensors and specifically photointerrupters, specifically slot type, and specifically they use an electrical transistor output. These devices are used to detect objects that pass through a beam of light. This type of sensor can be used in a variety of applications ranging from industrial automation, robotics, and sensing applications, such as position detection.

The sensor itself consists of an emitting diode and a phototransistor. They are mounted in an integrated package which is designed to project a light beam and to detect this beam with the integrated phototransistor. This beam is then used to detect objects passing in front of it. In the type of sensors we are discussing, the phototransistor is connected to an electrical transistor output. This then gives us the information as to whether the light beam has been interrupted or not.

The H21B3 is a particular type of photointerrupter that uses a transistor output. It typically has a transmission range of 6 mm. which makes it suitable for sensing smaller objects. The power requirement for the device is 8 Vdc with an output voltage of 0.2 V. The operating ambient temperature range is -25°C to 70°C. It also has a strong surge voltage protection and a high reverse voltage with excellent isolation.

The basic working principle of the H21B3 is simple. When an object passes through the beam of light from the emission diode, it is detected by the phototransistor which in turn triggers the transistor output. The transistor output then switches from the high to the low state, which gives us information about the presence or absence of the object.

The H21B3 is an ideal solution for applications that require a fast, reliable, and versatile device for detecting objects passing through a beam of light. This type of sensor is used in automated production lines, robotics applications, and as input triggers for home and office automation systems.

In summary, the H21B3 application field and working principle falls under the category of optical sensors, specifically photointerrupters, and specifically slot type, using electrical transistor output. This type of sensor can be used to detect objects passing through a light beam and is ideal for robust applications which require reliable detection.

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