Measures the water height. This 43mm probe can be connected to Sea Data via a WSI connection box. The depth displayed can indicate the height of water below the transducer or be set to display the depth from the water surface. Made of long-life fiberglass-reinforced polyester, the sensor can be retracted at will to reduce clogging. It comes with a sealing cap for long-term storage.
 Included in the box is an 8m cable and a TH43 through-hull.