WIKA flow switch for industrial heat exchangers, designed to detect interrupted flow ("no flow") of water and other non-corrosive liquids in industrial coolers, heaters or pipelines. Switch point repeatability ±0.5%, high-quality bellows and microswitch rated for over 500,000 cycles, rigid stainless-steel paddles to withstand pressure surges and high temperatures, red enclosure. Applications: heating, cooling, air-conditioning and water treatment plants, pumps and dosing systems, and operational controls preventing system failure when water/liquid supply is absent.