1- Lochinvar IFS01BL-S1 Industrial Flow Switch WTR2040 NEMA 1 ~ NEW | eBay
Calorimetric Flow Meter / Switch KAL - Industrial measuring and control equipment in the field of flow, pressure, level & temperature | Kobold Messring GmbH
McDonnell & Miller Series FS7-4E Industrial Liquid Flow Switches | Xylem Turkey