OPB811L55

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The OPB811L55 is an optical slot type photointerrupter, which consists of an infrared emitting diode and an NPN silicon phototransistor, both packages in a single plastic surface mount device (SMD). The devices are constructed in a reflective type configuration, with one emitter and two detectors, and are designed for applications requiring precision sensing of relatively small objects or signals. It is also very popular in applications where speed, accuracy and flexibility are essential for successful operation.

The key characteristics of the OPB811L55 are its wide sensitivity range, high-speed response time, and its robust, reliable construction. The device has the capability to detect objects with a width as small as 5mm, and the response time is typically between 30-200us. The device is also capable of sensing signals up to 15 feet away, providing accuracy that exceeds many other optical sensors available on the market. In addition, the device is built with epoxy-coated optics and epoxy-sealed leads to ensure that it is extremely resilient to vibration and humidity.

The OPB811L55 slot type photointerrupter can be used in various applications which require precise sensing for small objects or signals. Some of the most common applications are automatic doors and windows, security systems, coin-operated machines, vending machines, consumer electronic products, medical equipment, gaming machines, and robotic devices. The device can also be used in conveyer belt systems or other industrial automation systems.

The working principle behind the OPB811L55 slot type photointerrupter is relatively simple. The infrared emitting diode emits light which is sensed by the phototransistor when it passes through the device’s slot. The output is then amplified by the NPN transistor to create a TTL compatible signal. When an object is in the optical path, the emitted light will not reach the phototransistor, and the output will be logic low. When the object is out of the optical path, the emitted light will reach the phototransistor and the output will be logic high. This simple yet effective technology is used in a number of optical applications, such as proximity sensing, presence detection, light sensing, and presence control.

The OPB811L55 slot type photointerrupter is an attractive device for applications that need reliable and accurate detectability of small objects or signals. Its wide sensing range and fast response time make it a great choice for many different applications, from automatic doors and windows to conveyor belt systems. With its robust construction, it is capable of withstanding extreme vibration and humidity, and its TTL compatible output signal ensures simple communication with a variety of other devices. The OPB811L55 provides superior performance with any sensing application.

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