Raymarine Nylon Depth Thru-Hull f/ST40

The Raymarine Nylon Depth Thru-Hull for ST40 is a dedicated transducer designed for anglers and boaters who depend on accurate depth readings to navigate shallow waters, locate bottom structure, and fish productively. This thru-hull sensor integrates seamlessly with Raymarine ST40 instrument packages, providing real-time depth data that's critical for running inlets safely, anchoring in unfamiliar waters, and identifying drop-offs where fish congregate. Whether you're working coastal flats or inland reservoirs, reliable depth soundings are non-negotiable for both safety and success.

Built from marine-grade nylon, this thru-hull transducer is engineered to withstand saltwater exposure and UV degradation while delivering consistent performance in both aluminum and fiberglass hulls. The 30-foot cable provides ample reach from the transom-mounted transducer head to your console electronics, allowing flexible installation options on boats of various sizes. A 2-inch hole diameter installation keeps the thru-hull footprint compact, minimizing hull penetration while maintaining a clean, hydrodynamic profile that won't create turbulence or drag. The nylon construction resists corrosion better than metals in prolonged saltwater service, extending the lifespan of your depth-sensing system.

Boaters running Raymarine ST40 instruments will find this transducer essential for glass-cockpit integration and reliable depth data display. Installation is straightforward for most DIY boaters—the 2-inch hole can be drilled through the transom, and the 30-foot cable length accommodates engine compartments and cable routing along the hull without requiring extensions. If you're upgrading legacy electronics or replacing a failed depth sensor, this OEM-compatible thru-hull delivers the accuracy your Raymarine system was designed to display, ensuring your depth sounder functions as intended for years of safe, productive time on the water.