--\nOur eBay Store\n\nPlease note: This item has a longer lead time for dispatch then normal as it's a non-stocked item that is ordered in, please see the estimated delivery date by eBay. We will of course ship the item sooner if possible.\n\nB+B Sensors CON-WLS-GEH230V Level Controller Conducting Liquids 230V w Housing\n\nProduct Details\n\nFor simultaneous monitoring of minimum and maximum liquid levels in conductive liquids. The sensors (not supplied) can easily be made with contact surfaces on the container wall or with rod/cable electrodes. \n\nFunctionality: Four electrodes are installed in the liquid container so that they project into the medium as far as the desired switching point. The level is indicated by four LEDs corresponding to the water contact. When the container is completely empty, the red LED lights up. The lower two electrodes are used for switching a filling valve. The filling valve/pump is switched on when the lowest electrode is cleared and then switched off ;