The Raymarine M78717 Retractable Transducer is a specialized thru-hull sensor designed for boaters who need high-accuracy speed and temperature data without the maintenance headaches of a permanent installation. Its retractable design allows you to pull the sensor core out of the water for cleaning or winter storage while the boat is still afloat.

Professional Performance and Ease of Maintenance

Constructed with a rugged nylon housing, this transducer is specifically engineered for fiberglass or metal hulls. The low-profile "P120" design minimizes drag, making it a favorite for sailing vessels and performance powerboats. It uses an analog connection, providing immediate and reliable data to your instrument network.

• Retractable Core: Easily remove the paddlewheel insert to clean off marine growth or debris without hauling your boat out of the water.

• Self-Sealing Valve: Features an internal flap that minimizes water ingress when the insert is removed, giving you peace of mind during maintenance.

• Dual-Sensing Capability: Accurately measures both STW (Speed Through Water) and water temperature in a single hull penetration.

• Streamlined Profile: The near-flush mounting ensures clean water flow over the sensor for high-accuracy readings at both low and high speeds.

Technical Specifications

• Model Number: M78717 (P120)

• Housing Material: High-Strength Nylon

• Functions: Speed and Temperature

• Cable Length: 45 ft (13.7m)

• Hole Diameter: 2 inches (51mm)

• Compatibility: Raymarine ST60, ST60+, and i60 instruments (Analog)