BPX 81-3

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Optical sensors, such as phototransistors, play an important role in our daily life. One of the most commonly used phototransistors is BPX 81-3. This device has a wide range of applications and working principles.

BPX 81-3 is a highly integrated optical transistor specifically designed for infrared applications. It has high sensitivity and a long-life design, which makes it highly suitable for a variety of applications such as night vision systems, laser light routing systems, and medical imaging. This device is also the most commonly used phototransistor for remote-controlled devices.

The main working principle of the BPX 81-3 phototransistor is photon induced current. When an infrared light is incident on the device, the photons are absorbed by the base junction of the phototransistor and create a photocurrent. This photocurrent passes through the collector region and causes a voltage drop across the emitter junction, generating a proton current which is then drawn out of the device.

The sensitivity of the BPX 81-3 phototransistor is adjustable with the help of an external resistor. By adjusting the external resistor, the device can be configured for different response curves, depending on the particular application. For example, a high sensitivity range can be achieved with a low external resistor, while a lower sensitivity range can be achieved with a higher external resistor.

The BPX 81-3 is mainly used in motion detection, position detection, range finders, and night vision systems. It can be effectively used to detect when something moves into the range of the phototransistor and also to track its path. The device is also used in medical imaging machines, where it can detect the presence of cells to be identified or studied. In laser light routing systems, this phototransistor is used to detect the direction of an incoming laser beam.

BPX 81-3 phototransistors are also widely used in surveillance systems. These devices are used to detect the presence of objects at a distance and to provide the necessary information for a security system to activate an alarm. Furthermore, they are used in receiving systems to determine the amplitude of a signal by measuring the voltage across the emitter.

In summary, BPX 81-3 is a highly efficient and versatile phototransistor that is suitable for a wide range of applications. It is easy to configure and has adjustable sensitivity to match the particular needs of any application. Furthermore, its long service life and high sensitivity make it a preferred choice for achieving reliable and accurate results in a variety of applications.

The specific data is subject to PDF, and the above content is for reference