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There are 3 products.

Series OLS Optical Level Switch

With a range of features, capacities, and abilities, the series OLS optical level switches provide quick response while using no moving parts for stability and process control. Produced by the leading manufacturer with the finest raw materials, the switches use an LED display, a photo-transistor, and a compact switch. View the complete list of products below to find the one for you, and if you have any questions concerning any of our items, please contact us at or chat with us live.