OPB857Z

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Optical Sensors - Photointerrupters - Slot Type - Transistor Output

The OPB857Z is a type of optoelectronic sensor in the class of photointerrupters, specifically slot type sensors with transistor output. Such sensors are used to detect the presence or absence of an object, or when used in pairs to measure distance or the rate of motion of objects. This is an advantage when components must be accurately aligned, as a physical contact is neither necessary nor desirable.

Application Fields

OPB857Z sensors can be used in a wide variety of applications, including counting, presence detection, or edge detection. They are used in tasks which require accurate positioning, such as automated assembly lines, material handling equipment, and medical equipment. They are also used in robotics, automation, and machine vision systems. OPB857Z sensors can also be used for monitoring rotating machinery, detection of paper jams in printers and copiers, and measurement of the movement of objects.

Working Principles

The OPB857Z sensor consists of an infrared LED and a phototransistor mounted on opposite sides of a slot. When an object interrupts the slot the phototransistor changes the voltage applied to the LED, which causes it to emit a varying amount of infrared light that is detected by the phototransistor. This change in voltage is then converted into a digital signal that can be used by the system. The OPB857Z sensor also has a built-in amplifier, allowing it to detect small variations in the amount of light received by the phototransistor.

Features and Benefits

The OPB857Z optoelectronic sensors have several features that make them advantageous for a variety of applications:

• Compact design and low profile for easy integration into any system
• High reliability due to the absence of mechanical contact and minimal moving parts
• High resolution due to the built-in amplifier
• Robust design that is resistant to shock, vibration, and dust
• Cost-effective, due to their long life-span and minimal maintenance

In summary, OPB857Z sensors are an excellent choice for tasks where precision, reliability, and cost-effectiveness are needed. Their compact design and built-in amplifier makes them suitable for a variety of applications, including precision measurement, edge detection, and presence detection.

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