WF120-40B416

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Optical Sensors are electronic devices that utilize light to detect objects, and provide electrical signals in response to the presence or absence of objects in the field of view. Photointerrupters are devices that detect the interruption of a light beam via use of an optically-sensitive transducer, which is used to convert light into an electrical signal. Slot Type Photointerrupters are designed to detect the interruption of a light beam where the interruption occurs in a specific slot, or groove, in the light beam. These devices feature a Transistor Output, which allows for connection to external circuits, translating the object’s presence into electrical signals.

One such device is the WF120-40B416, a 4-pin 300mA 536nm Transistor Output Type Photointerrupter. It features a wide operating voltage of 5-24V DC, and a hermetically sealed housing, which helps protect it from the environment and increases its operational lifespan. This device is designed for a wide variety of applications, including time, motion, continuous positioning, sensing distance, being employed as part of occupancy control operations, and more.

The WF120-40B416 features a design wherein a modulated infrared light source (IR LED) emitting at a wavelength of 536nm is positioned in a slot in a metal plate. This light is detected with a photodetector mounted on an opposite side of the metal plate. When an object passes through the slot, it interrupts the light beam, and this interruption signals a change in electrical state. This electrical signal is sent to an amplifier which amplifies the signal, and then sent to an output transistor, which acts as a switch that opens and closes to activate and deactivate external circuits, and provide the appropriate output.

The hermetically sealed metal housing of the WF120-40B416 is designed for applications in factories, production lines, and other industrial environments. The hermetic seal helps protect it from dust, dirt, oil, and moisture, and allows the unit to function in heavy duty and high-speed industrial environments. The sealed nature of the packaging also helps it operate quietly and without generating excess heat.

The WF120-40B416 is a reliable, easy to install, and energy-efficient solution for applications requiring a Photointerrupter unit, and its Transistor Output Type design allows for connection to external circuits. With an operating temperature range of -30°C ~ 85°C, and a low operating voltage of 5V, this device is designed to perform in a wide range of environmental conditions and applications.

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