WFM80-60N311

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Optical Sensors – Photointerrupters – Slot Type - Transistor Output

The WFM80-60N311 is a slot type photointerrupter with a transistor output. It is a variety of optical sensors, which detects positions and changes of an object using the state of light; it is used in many industries such as manufacturing, automotive, industrial, and consumer. They are preferred for low-cost and non-contact sensing applications such as conveyer lines and home appliances.

The typical optical sensors are comprised of a light emitter and detector; when an object interrupts the light beam between them, the output signal changes and the sensed object is detected. The WFM80-60N311 has an infrared LED light source and a phototransistor as the receiver. The infrared LED transmits and the phototransistor responds to infrared radiation, as well as visible radiation. The LED emits for a limited viewing angle, permitting only the phototransistor to respond to the changed current level. The output is a transistor signal output of either with or without modulation.

The WFM80-60N311 is suitable for use in all applications requiring edge detection on transparent objects such as glass or film. The typical ambient light rejection prevents false triggering. The metal background case of WFM80-60N311 provides excellent protection against moisture, dust, or electrical interference that could produce signal noise, and it is designed to withstand shock and vibration.

The WFM80-60N311 features a long sensing range from 0.5 to 10.0 mm. It has a reliable output voltage of 2.2V at the low level and a nominal 5V at the high level. It benefits from a response time of 10μs (rise + fall) and an isolation voltage of 3750VAC between input and output. The switching power capacity is up to 100mA at 40Vdc max.

The WFM80-60N311 is also designed with a signal-gain control feature. It adjusts the light-receiving sensitivity in order to suppress light interference from ambient sources. The modulation frequency response is 100-500kHz. It is an ideal device for applications where reliability, optical isolation, and fast speed are essential considerations.

The WFM80-60N311 slot type photointerrupter is an effective and reliable tool for detecting discreet positions, measuring linear motions, and monitoring rotary movements. Its working principle depends on an object interrupting the light beam between the LED light source and the photosensor. The output current changes under this cause: If the output current is lower than the quiescent amount, the level of the LED is low; if the current is higher, the LED goes off. This makes the device a useful choice for sensing applications in various industries.

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