water level meters when the probe enters water, the water completes an electrical circuit powered by a 9v battery, sending a sig The volume of oil cable,tape wire,Water level gauge cable,tape cable,water level metersStructure & Specifications:Conductor: copper / tinned copper wireInsulation material:Sheath material: PU/TPU/LLDPE/PVCColor: multicolorGood flexibility and elasticityOil resistant; ...