The Furuno ST-02MSB Bronze Thru-Hull Speed & Temperature Sensor provides dual-function monitoring with precision speed-through-water and water temperature measurements in one reliable bronze housing. Built on the proven Airmar B17 platform, this professional-grade sensor delivers accurate real-time data through its 6-pin connector system, making it essential for fishing, navigation, and performance monitoring applications where precise environmental data is critical for success.

Key Features & Benefits

• Dual-Function Sensor: Simultaneously measures boat speed through water and precise water temperature
• Bronze Construction: Marine-grade bronze housing resists corrosion and provides long-term reliability
• High-Precision Temperature: Fast-response thermistor with ±0.3°C (±0.17°F) accuracy and 5-second response time
• Integrated Speed Measurement: Paddlewheel mechanism provides accurate speed readings for navigation and fishing
• Low-Profile Design: Nearly flush installation minimizes drag with only 5mm extending outside hull
• Extended Cable Length: 9-meter (30-foot) cable provides installation flexibility for various vessel layouts
• Professional Connectivity: 6-pin connector ensures reliable data transmission to Furuno electronics
• Retractable Insert: Valve assembly allows sensor removal without water intrusion

Technical Specifications

Performance Characteristics

• Speed Accuracy: Precise paddlewheel mechanism provides accurate boat speed through water
• Temperature Precision: Fast-response sensor ideal for detecting thermal boundaries and temperature changes
• Hydrodynamic Efficiency: Low-profile design minimizes drag and turbulence
• Response Time: Quick sensor response enables real-time monitoring of changing conditions
• Reliability: Bronze construction ensures consistent performance in harsh marine environments
• Serviceability: Retractable insert design allows maintenance without hauling vessel

Installation & Design Features

• Standard 2-Inch Installation: Fits existing 51mm (2-inch) thru-hull openings
• Retractable Insert System: Water valve prevents intrusion during sensor removal
• Low-Profile Housing: Minimal extension beyond hull surface reduces drag
• Bronze Button Sensor: 25mm (1-inch) sensing face optimizes water contact
• Professional Sealing: Marine-grade seals ensure watertight integrity
• Through-Hull Mounting: Secure installation below waterline for consistent readings

Marine Applications

• Sport Fishing: Identify thermal boundaries and temperature breaks that attract baitfish and gamefish
• Commercial Fishing: Monitor water conditions for optimal fishing locations and fuel efficiency
• Navigation & Cruising: Accurate speed measurements for navigation planning and fuel calculations
• Sailing Applications: Monitor boat speed and water temperature for optimal sail trim and routing
• Tournament Fishing: Precise data for competitive fishing strategies and boat performance
• Research & Monitoring: Scientific applications requiring accurate environmental data

System Compatibility

Designed for integration with Furuno marine electronics:

• Furuno Chartplotters: GP and NavNet series with 6-pin sensor inputs
• Multi-Function Displays: Display speed and temperature on compatible screens
• Fishfinders: Integration with sonar systems for comprehensive fishing data
• Navigation Systems: Speed input for accurate navigation calculations
• Data Recording Systems: Log speed and temperature data for analysis

Fishing & Navigation Advantages

• Thermal Detection: Identify temperature changes that indicate productive fishing areas
• Current Monitoring: Detect current boundaries through temperature and speed variations
• Fuel Efficiency: Optimize engine performance based on accurate speed readings
• Safety Navigation: Monitor boat speed for safe harbor entry and maneuvering
• Performance Analysis: Track boat performance under varying conditions

Installation Considerations

• Location Selection: Install in area with smooth water flow, away from hull irregularities
• Professional Installation: Proper through-hull installation ensures watertight integrity
• Cable Routing: 9-meter cable allows flexible routing to electronics location
• Valve Maintenance: Regular inspection ensures proper valve operation
• Sensor Cleaning: Periodic sensor cleaning maintains accuracy and performance

What's Included

• ST-02MSB Bronze Thru-Hull Sensor (Airmar B17 base)
• Retractable insert with speed and temperature sensors
• Bronze thru-hull valve assembly
• 9-meter marine-grade cable with 6-pin connector
• Through-hull installation hardware
• Installation documentation and sealing materials

Professional Installation Recommended

Through-hull installation requires precise hull cutting, proper sealing, and electrical connections. Professional installation ensures optimal performance, maintains hull integrity, and preserves warranty coverage. Consider marine electronics specialists for best results.

Frequently Asked Questions