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KOER KS-5 electronic pressure controller (KP2787). The Koer KS-5 pressure controller is designed to automate water supply systems in residential buildings, maintaining constant water pressure in the system by automatically starting and stopping the pump. This controller is suitable for installation on centrifugal pumps, borehole pumps, vortex pumps, and all types of pumping stations as dry-run protection and for work automation. The controller operates on the flow relay principle (turns the pump on when flow is present and turns it off when there is no water flow in the system). The controller combines the function of a pressure relay (turns the pump on according to the set pressure value in the system). Also, the most important function of the Koer KS-5 pressure controller is protection against