The ST800-B120/P120 Paddlewheel Kit (Airmar Part #33-493-01) is the essential maintenance set for Airmar ST800 series Speed and Temperature Smart™ Sensors. Designed specifically for low-profile B120 (Bronze) and P120 (Plastic) housings, this kit allows you to replace high-wear components to restore accurate "speed through water" readings.

High-Precision Performance

Over time, marine growth, silt, and mechanical wear can degrade paddlewheel performance, leading to sluggish or inaccurate speed data. This kit provides a complete factory-spec refresh for your transducer's moving parts, ensuring your NMEA 2000® or analog system receives clean, 4.8 Hz-per-knot data signals.

Kit Contents

This comprehensive spares kit includes all wearing parts for both the active paddlewheel and the blanking plug assembly:

• 1x High-Performance Paddlewheel & Shaft: Features a balanced design for a wide speed range (2–45 knots).

• 2x Waterproof O-Rings: High-grade seals to prevent water ingress during operation.

• 1x Valve Sleeve: Ensures the internal self-closing water valve operates smoothly when the insert is removed.

• 1x Retaining Ring: Secures the internal assembly within the low-profile housing.

Key Specifications