The ST-7 is a newly developed version of the flow switch having a completely new operating principle. In this new development a robust and industrial micro switch is inserted instead of the usually super sensitive REED-contacts with low switching capacity. This micro switch makes it possible to realise a significantly higher electrical output though having a longer working life. The electrical and water-hydraulic components of the flow switch are completely separated. The construction of the flow switch allows mounting the electrical parts independent of the hydraulic components within the series production process. When fitting together chassis and switch box both parts of the flow switch are connected again. Due to the mature engineering low switching points are realised in spite of maximum water quantities. The pressure drop within the flow switch is only 1.5 bar at 30 l/min. Protection class IP65. Cable 1,200 mm. 10 A. 250 V. Inrush current 20 A (NC) and 15 A (NO). M