Sensar Bilge Sentry Extension Cable - 6M [BSEC6M]Bilge Sentry Extension Cable 6M Extension for the Water Module The water module comes with a 1. 5 meter cable connected directly to the sensor. If that cable cannot reach the bilge, then users will need this extension cable. This extension cable has 5 pins and is 6 meters in length. The system supports extension with up to two extension cables (12m max). Specifications: Length: 6 meters Specifications: Type: Extension Box Dimensions: 1"H x 5"W x 9"L