Level Control Systems
An electrode (metallic rod or tube) is placed in a conductive liquid (e.g. water, acid, sewage & other aqueous solutions) at the point where
switching is required. When the liquid touches or leaves the tip of the electrode, an electrical circuit between it and earth is completed. This causes a switch to operate in the control unit. This is a very simple, accurate and economical method of controlling levels in liquids and covers up to 70% of applications.