OPB380L55

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Optical sensors, otherwise known as photoelectric devices, are advanced sensing units that have been around since the early 1900s. They are comprised of an emitter, such as a light or laser source, that sends optical signals across to an intended or pre-determined receiver. The receiving device is able to detect these signals and convert them into a detectable electric voltage. Consequently, this information can be used to detect the presence of an object or to identify certain attribute changes within them. One of the many types of optical sensors currently available on the market is the OPB380L55 – a photointerrupter transistor output slot type.

The OPB380L55 is typically used in applications where precise triggering and timing of events is essential, such as in door access systems and in automatic car washes. It operates by utilizing an infrared light source which, when interrupted, causes the output signal of the photointerrupter to change from high to low. This enables it to identify the interruption of an object, such as a payment card, in its path.

The OPB380L55 is typically mounted in an infrared-permeable housing with a slot designed to accept its desired object, thus making it convenient for many applications. To reduce its environmental sensitivities and improve its performance life, it features an integrated filter. This filter extends the lifespan of the OPB380L55 by reducing the occurrence of false triggering. It can handle exposure to dust and foreign objects as long as they are not directly in the optical path.

Within the OPB380L55, there is a light path comprising of a transmit module and a receive module. The transmitter module consists of a diode which emits infrared light onto a target. This light is then “sensed” by a phototransistor situated inside the receiver module.When an object passes through the sensor slot, it interrupts the light path, thus generating a voltage change which can be measured by circuits within the photointerrupter itself. This voltage change is then interpreted as an alarm or trigger and communicated to the system.

While similar photointerrupters can be found featuring other output types such as NPN or PNP, the primary advantage for choosing a transistor output device is its ability to produce a more accurate signal and therefore a higher product quality. This is because the transistor output of the OPB380L55 can remain on all the time, eliminating any signal instability that can occur with other output types.

The OPB380L55 is an incredibly versatile optical sensor, making it a reliable choice for those seeking accurate triggering and timing of events. Its easy installation and use, combined with a reliable, durable body, ensures its continued usage in a variety of applications.

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