Speed and Temperature Sensing with Precision

The Raymarine ST900 Speed/Temperature Low Profile Thru-Hull Sensor is designed to deliver accurate and reliable speed and temperature readings for marine applications. Featuring the cutting-edge Gen2 Paddlewheel, this sensor ensures superior performance with improved start-up responsiveness and precise linearity across the entire speed range. Its low-profile design minimizes drag, making it an excellent choice for both sailing and powerboats.

This unit is designed for seamless integration, retrofitting into Airmar P120 and B120 housings. The sensor’s retractable insert allows for easy maintenance, and the built-in water valve minimizes water ingress when the unit is removed.

Advanced Speed Performance

With an industry-leading speed range from 0.3 to 45 knots (0.34 to 52 MPH / 0.55 to 83 KPH), the ST900 provides highly responsive speed data. The Gen2 Paddlewheel enhances accuracy, ensuring smooth speed readings even at low speeds, making it ideal for various marine conditions.

Durable Low-Profile Housing

The nearly flush, low-profile design extends only 5 mm (3/16") outside the hull, reducing drag while maintaining efficiency. The durable construction ensures longevity and resistance to harsh marine environments.

Technical Specifications

• Functions: Speed and Temperature
• Speed Range: 0.3 to 45 knots (0.34 to 52 MPH / 0.55 to 83 KPH)
• Temperature Accuracy: ±0.5°C (±1.8°F)
• Water Temperature Range: -10°C to 40°C (14°F to 104°F)
• Mounting Style: Low Profile Thru-Hull
• Housing Material: Bronze (varies by model)
• Hole Size: 51 mm (2")
• Cable Length: 13.7m or 20m (varies by model)
• Protocol Output: Analog
• Retractable Housing: Yes
• Retrofits: Airmar P120 and B120 housings

Product Dimensions

• Cable Length: 13.7m or 20m (depending on variant)
• Hole Size: 51 mm (2")

Finishes

• Available in Bronze or Plastic (depending on the model).

Key Features

• High-performance Gen2 Paddlewheel for superior speed accuracy
• Best-in-class speed range from 0.3 to 45 knots
• Retractable insert with a water valve for easy maintenance
• Compatible with Airmar P120 and B120 housings
• Low-profile design minimizes drag for enhanced efficiency

Variations Available

• E70686: Bronze housing / 13.7m cable
• E70673: Plastic housing / 13.7m cable
• E70674: Plastic housing / 20m cable

This versatile speed and temperature sensor is designed for reliability and durability in demanding marine environments. Whether used for sailing or powerboating, the Raymarine ST900 ensures precise readings and seamless integration with existing thru-hull setups.