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The Banner SM30 Barrel Emitter uses an infrared photoelectric sensor to detect movement or presence. Works up to 500 ft. Uses an infrared LED sensing beam.
A lot of engineering ingenuity has gone into the development of the Banner SM30 Barrel Sensor Emitter. For example, EZ-BEAM® technology delivers reliable sensing without the need for adjustment. Then there's the modulation frequency where “A” is standard yet “B” and “C” are also available to prevent crosstalk in multiple-sensor applications. Stainless steel or plastic barrel models are available.