FS-400P Series Flow Switches designed for low cost flow/no-flow monitoring. This series is available with a clear, transparent PVC housing which is ideal for use where visual flow confirmation is desirable. FS-400P corrosion-resistant switches offer broad chemical compatibility. Applications include: Protect Bearings or Gears (oil separators, fuel systems, pumps, compressors, presses), Electronics or Machinery (heat exchangers, semiconductor manufacturing equipment, induction furnaces, radio transmitters), Process Systems (water filtration and reverse osmosis, chlorinators, de-icers, sterilizers, evaporators).