Discover the reliability of the Raymarine B45 Bronze Thru-Hull transducer, a proven choice for boaters seeking accurate depth readings in demanding marine environments. This stem-mount unit, complete with a customizable fairing block, delivers precise analog depth signals to your Raymarine instrument displays, ensuring you navigate with confidence whether you're cruising coastal waters or exploring deeper offshore zones.

Precision Engineered for Superior Performance

Crafted from durable bronze, this thru-hull depth transducer thrives on fiberglass and wood hulls, resisting corrosion and standing up to constant saltwater exposure. Its dual-frequency operation—50 kHz for wide-area coverage and 200 kHz for detailed bottom tracking—provides versatile scanning tailored to your boating needs. With a maximum depth capability of 1200 feet, it's ideal for everything from shallow bays to deep-sea adventures.

• Optimized beam widths: 12° at 200 kHz and 45° at 50 kHz for comprehensive coverage.
• Accommodates hull deadrise angles up to 26° with the included fairing block, which trims easily for a perfect fit.
• 45-foot cable offers flexible routing options during installation.

Real-World Benefits for Boaters

Boat owners rave about the B45's rugged construction, which minimizes downtime and maximizes peace of mind on the water. The fairing block ensures optimal transducer alignment, reducing signal distortion caused by hull angles and delivering cleaner, more reliable depth data. Unlike plastic alternatives, the bronze housing provides a secure, long-term seal against water intrusion, making it a smart investment for vessels exposed to harsh conditions.

Pair it with Raymarine's ST-series instruments for seamless integration, and enjoy readings that help you avoid shallows, locate fish-holding structures, or monitor anchor depths effectively. Its analog output keeps it compatible with legacy systems, bridging old and new setups without hassle.

Streamlined Installation Tips

Installing the B45 Bronze Thru-Hull is straightforward for DIY-savvy boaters. Drill a precise 7/8-inch hole in your hull, thread the transducer through, and secure it with the O-ring and nut for a watertight fit. Customize the fairing block to match your hull's deadrise using a saw or sander—mark it first for accuracy. Position it forward-facing at the lowest point of the hull to capture undisturbed water flow, avoiding turbulence from props or keels. Always bed it with marine sealant for extra protection, and test thoroughly after launch.

Pro tip: Dry-fit everything before finalizing to ensure the cable exits cleanly and the unit sits flush, optimizing signal quality from day one.

Broad Compatibility Across Raymarine Systems

This transducer shines with popular Raymarine displays like the ST60+, ST290, and ST70 (with optional pod). It's a drop-in upgrade for older ST60 setups, providing the analog signal these instruments crave. Whether retrofitting an existing panel or building a new one, the B45 ensures your depth data flows reliably to your helm.

Maintenance for Peak Longevity

To keep your B45 performing flawlessly, inspect the transducer face seasonally for marine growth—gently clean with a soft brush and biodegradable solution, avoiding abrasives. Check cable connections for corrosion and reseal if needed. Winterizing? Flush the thru-hull with fresh water to prevent buildup. With proper care, this unit delivers years of trouble-free service.