Description Water Sensor WS 4010 Cable length: 10 m The water sensor WS 4010 is suitable in combination with the H-TRONIC water level switch WPS 4000 (Best. No. 1299302) for automatic level monitoring of conductive liquids in containers, wells, cellar rooms or the like. The measuring sensor with 10 m long PVC connection cable is intended only to control liquid levels in non-aggressive media