Raymarine ST900 Speed/Temp Low Profile Bronze Thru-Hull with 13.7m Cable

The Raymarine ST900 Speed/Temp Low Profile Bronze Thru-Hull with 13.7m Cable is a dual-function marine transducer designed for anglers, cruisers, and boaters who demand real-time water speed and temperature data at the helm. This retractable insert transducer fits flush through your hull in a low-profile bronze housing, making it ideal for vessels where traditional through-hull mounting space or aesthetics are a concern. Whether you're chasing striped bass in tidal rivers, navigating coastal waters, or monitoring thermal layers while offshore fishing, accurate speed and temperature readings are mission-critical for navigation safety and fish-finding success.

Built with corrosion-resistant bronze construction, the ST900 delivers industry-leading speed measurement across a 0.3 to 45-knot range (0.34 to 52 MPH / 0.55 to 83 KPH), ensuring pinpoint accuracy whether you're trolling at low speeds or running at wide-open throttle. The fast-response temperature sensor captures thermal changes instantly, critical for locating temperature breaks where gamefish congregate or avoiding dangerous thermocline transitions. Analog output integration means compatibility with legacy Raymarine systems and other marine electronics, while the 13.7-meter (approximately 45-foot) cable provides flexible installation routing through your boat's core and into the pilothouse or console without signal loss.

This transducer is best suited for retrofits on cruising sailboats, center-consoles, and displacement-hull vessels where a low-profile installation preserves weight distribution and aesthetic lines. The retractable insert design allows for haul-out maintenance without full transducer replacement, and the bronze housing resists galvanic corrosion in saltwater environments for years of reliable service. Installation requires a thru-hull seacock and proper bedding compound; verify hull thickness and existing electronics compatibility before ordering to ensure seamless integration with your navigation or fishfinding system.