SD5491-004

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Optical sensors or phototransistors are sensing elements which convert light into corresponding electrical signals. The SD5491-004 is an industrial grade phototransistor, specifically designed to detect infrared radiation in a range of wavelengths. It has a wide range of applications and can be used to detect presence, direction, color and motion.

The SD5491-004 is a phototransistor with a low dark current and a fast response time. It is also designed to reduce the ambient light noise, so it can be used in applications that require greater sensitivity. It can detect both near IR (860nm - 1000nm) and far IR (1000nm - 1100nm) levels. Its wide operating temperature range (–30°C to 100°C) and high peak current make it well suited for applications in high temperatures and where harsh environments are encountered.

The SD5491-004 operates on a three-stage principle – light absorption, light alteration and light emitting. First, it absorbs the light of a specific wavelength through the transparent epoxy lens coating. The light is then altered by the internal circuits, amplifying the signal depending on the wavelength and the physical distance to the target. Finally, the infrared light is emitted from the device\'s phototransistor output.

The SD5491-004 is most commonly used in motion detectors and presence detection systems. It can be used in security and surveillance systems, robotics, and environmental monitoring. It is also used in medical imaging and imaging systems. For example, the device can be used to detect the presence of a patient in bed or to detect motion in an operating theater.

The SD5491-004 is also widely used in automotive applications, where it is used to monitor the distance between a vehicle and an obstacle. It can be used to detect pedestrians, animals, or other objects in the road and is used for advanced driver assistance systems (ADAS). It is also used in parking assistance systems to detect the exact location of a vehicle in a parking lot.

The SD5491-004 can be used in commercial and industrial automation applications as well. It can be used to control lighting operations, such as switching the lights on and off, and to monitor the temperature in a factory. It can also be used to detect faults in automation systems or to detect the presence of objects in a conveyor system.

The device is simple to install and easy to use. It can be connected to a variety of microcontroller boards, such as Arduino, Raspberry Pi, STM32, or ESP32. The microcontroller can then be programmed to read the signals emitted by the device and take the appropriate action.

The SD5491-004 is an excellent choice for a variety of applications where infrared detection is needed. Its wide operating temperature range, low dark current, and high peak current make it ideal for industrial applications. Its ability to detect bothnear IR and far IR levels can also be beneficial in medical and automotive applications. With its robust construction and simple setup, the device is well suited for use in a variety of industrial, commercial, and automotive applications.

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