EE-SPY402

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The EE-SPY402 is an optical sensor categorized as a reflective logic output type. It emits infrared light from its infrared LED and uses a highly sensitive phototransistor to detect objects, performing on-off detection. Those objects can be anything opaque enough to reflect the infrared light beam back to the sensor. On detection, the EE-SPY402 supply output is switched to a “1” from a “0”. This sensor is an ideal solution for basic detection, positioning, or alignment applications.

Operating Principle

The EE-SPY402 consists of an infrared LED and a highly sensitive phototransistor. When power is supplied to the EE-SPY402, the infrared LED emits light and directs it to the desired surface. When a reflecting surface is placed within the light range, some of the light is reflected back to the EE-SPY402. The highly sensitive phototransistor detects the light which is then converted to an electrical signal. This signal is then sent to the CMOS inverter circuit which then outputs a high \“1\” or a low \“0\” depending on whether light has been detected.

Application Fields

• Paper and Packaging: EE-SPY402 sensors are used in Electronic line shafts for efficient marking and sensor verification.
• Food and Beverage Processing: EE-SPY402 sensors are used for product counting and for detecting if a product is ready for dispatching.
• Home and Office Automation: EE-SPY402 sensors are used for remote control, automatic window openers, automatic door locks, automatic lighting systems, etc.
• Industrial Automation: EE-SPY402 sensors are mainly used for industrial automation tasks such as automated assembly lines, robotic movement control, and other industrial machines.

Advantages

• Flexibility: EE-SPY402 sensors can be used in both indoor and outdoor environments.
• Accuracy: The EE-SPY402 is equipped with a highly sensitive phototransistor, providing reliable detection of objects.
• Durability: The EE-SPY402 has a robust design, making it suitable for long-term use.
• Robust Output: The EE-SPY402 can be programmed to output either a high “1” or a low “0” output.
• Economy: The EE-SPY402 is cost-effective, making it a popular choice for many applications.

Limitations

The EE-SPY402 can be used for a range of applications, however it is sensitive to fluctuations in ambient temperature and humidity. These elements can affect the performance of the sensor, causing a false detection. The sensor is also affected by dust or dirt, as these particles can block the infrared light beam. Furthermore, the EE-SPY402 is limited to detection of opaque materials; transparent objects will not reflect the light back to the sensor, thus not being detected.

Conclusion

The EE-SPY402 is an optical reflective-type sensor suited for basic detection, positioning, or alignment applications. It emits infrared light and detects objects by using a highly sensitive phototransistor. It has been used in paper and packaging, food and beverage processing, home and office automation, as well as in industrial automation. The EE-SPY402 has several advantages including flexibility, accuracy, durability, robust output, and economy. Depending on the application it can be used for, it can be sensitive to changes in temperature and humidity, dust and dirt, and is not able to detect transparent objects.

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