d. Moderate Contamination – Milling Operations e. High Contamination – Heavy particulate, extreme washdown environments f. Extreme Contamination – Coal bins Photoelectric sensors are indispensable tools in modern industrial automation, offering reliable and versatile object detection capabilities. Understanding the nuances of Through-Beam, Retroreflective, and Diffused sensors is crucial for selecting the optimal solution for specific applications. By carefully considering factors such as location, beam size, sensor output, output configuration, and excess gain, engineers can ensure the successful integration of photoelectric sensors into their automation systems. The judicious choice of these sensors contributes significantly to enhanced efficiency, productivity, and quality control in various industrial settings.
sensor you need. Through- beam, retroreflective, and polarized retroreflective sensors are all capable of Light-Off and Dark-Off output configurations whereas Diffuse Reflective sensors are capable of Light-On and Dark-On configurations. 5. Excess Gain. Excess Gain is the measure of the minimum light energy needed to ensure proper triggering of the sensor. When selecting your sensor, you need to ensure there is sufficient excess gain to allow for proper detection. This will be especially important in dirty industrial environments. When researching your sensor options, most manufacturers will provide an excess gain curve chart
for both non-polarized and polarized sensors. These charts will provide maximum distance vs. maximum receiver gain based on a clean environment. There are levels to consider based on the cleanliness of air in which the sensor will be operating. Here are some examples to help explain the level of air contamination and how they impact sensor operation and object detection. a. Clean Air – Ideal Conditions, perfectly clean air.
b. Slightly Dirty Air –
Non-industrial areas
c. Low Contamination – Warehouse, light manufacturing
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