Upgrade your vessel's navigation with the reliable Furuno ST-02PSB thru-hull sensor, designed specifically for precise speed and water temperature measurements. This plastic insert fits seamlessly into standard thru-hull housings, delivering real-time data to keep you informed during every voyage, whether you're racing offshore or cruising coastal waters.

Key Features That Stand Out

The ST-02PSB combines speed detection via an impeller mechanism with a robust thermistor for temperature sensing. Its 6-pin connector ensures straightforward integration with Furuno's ecosystem, while the included 9-meter cable offers ample length for flexible routing through tight bilge spaces. Crafted from durable plastic, it resists corrosion in saltwater environments, maintaining accuracy season after season.

• Impeller-Based Speed Sensing: Captures boat speed over ground with minimal drag, providing log readings from 0 to 40 knots.
• Integrated Temperature Probe: Monitors water temps from -10°C to 40°C, ideal for fishing hot spots or engine cooling checks.
• Low Profile Design: Reduces hydrodynamic interference, helping preserve your hull's sleek lines and performance.
• Extended Cable Reach: 9 meters of shielded wiring minimizes signal noise and simplifies installation.

Why Boaters Choose This Thru-Hull Insert

Boat owners rave about the ST-02PSB for its no-fuss performance in diverse conditions. Unlike paddlewheel alternatives that foul easily with marine growth, this impeller spins freely and cleans with a simple freshwater flush. It's a game-changer for sailors tracking true wind speeds or anglers charting thermoclines. Pair it with Furuno multifunction displays or analogs for instant readouts, enhancing situational awareness without cluttering your helm.

Durability meets precision: The sensor's materials withstand UV exposure and impacts from debris, ensuring consistent data even on rough passages. Users report exceptional calibration stability, cutting down on recalibration downtime during busy charters or regattas.

Effortless Installation Tips

Installing the ST-02PSB is straightforward for DIY enthusiasts or pros. Drop it into a compatible 51mm thru-hull fitting (like Furuno's standard models), secure with O-rings, and route the cable away from high-voltage lines to avoid interference. Apply marine sealant around the hull penetration for a watertight seal. Pro tip: Align the insert's arrow with your boat's centerline for optimal speed accuracy—north-up for forward motion. Test in shallow water post-install to verify impeller spin and temp response before heading offshore.

For retrofits, it slots perfectly into existing Furuno speed/temp housings, saving time and hull modifications. Always bed the assembly with a non-silicone polysulfide sealant to prevent leaks under flexing hulls.

Compatibility and Versatility

This 6-pin insert shines with Furuno's GP series chartplotters, NavNet systems, and dedicated instruments like the FI-5001. It supports NMEA 0183 output for third-party networks, broadening its appeal. Whether powering a compact dayboat setup or a full bridge command center, the ST-02PSB delivers plug-and-play reliability. Note: Matches 12/24V DC systems common in recreational and commercial marine applications.

Maintenance for Peak Performance

Keep your sensor humming with routine care. Haul out annually to inspect the impeller for growth—twist it gently by hand or use a soft brush. Rinse with fresh water after saltwater use to flush debris. If speed readings drift, check cable connections first; a simple reseat often resolves it. Store spares in a dry locker to swap during extended trips. With proper upkeep, expect years of trouble-free operation, outlasting cheaper imports prone to impeller wear.