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Photo sensors have the ‘smallest bodies and longest ranges’

03 February, 2020

Omron has launched a series of reflective photoelectric sensors that, it claims, have the smallest bodies and the longest sensing ranges (up to 1.5m) in their class. The E3AS sensors are not affected by sensing distances, colours, materials or the surfaces of objects, making them easier to select, commission, adjust and maintain.

The sensors can be used, for example, on high-mix conveyor lines that carry products of various colours and shapes, and on assembly lines where space is tight.

The sensing distance with the new sensors is five times longer than Omron’s previous E3Z-LL products. The range of 50–1,500mm eliminates the need to choose different sensors depending on the application.

An antifouling coating on the sensor surface – claimed to be the first of its type in the industry – prevents water droplets, oil, and dust from sticking to the sensor, and the lens from fogging. Omron says the coating will reduce false detection and extend cleaning frequencies.

Omron’s photoelectric sensors have a special coating that prevents oil, water or dust from sticking to them

The sensors use a time-of-flight (TOF) detection technology which is said to be stable regardless of the characteristics of objects being sensed. Unlike other photoelectric sensors, separate evaluation and positioning are not required for each object being sensed, thus saving time.

Patented laser welding technologies have been used to enhance the sealing and adhesion between the parts of the case, reducing failures in water (IP69K) and oil (IP67G). The sensors are available with stainless-steel or plastic cases.

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