Raymarine BTH Tri‑Series.

Raymarine BTH Tri‑Series Thru Hull Transducers

The Raymarine BTH Tri-Series thru‑hull transducers are designed for reliable depth, speed, and temperature performance across a wide range of vessels. Built with robust housings and high‑accuracy sensors, these models integrate seamlessly with Raymarine DSM30 and DSM300 sounder modules to deliver precise underwater data at speeds and depths suited for both sail and powerboats.

Both variants feature dual‑frequency operation (50 / 200 kHz) for deep and shallow water versatility and include a self‑sealing paddle wheel insert for easy servicing. The transducers come equipped with a high‑speed fairing block for optimized performance and minimal drag. The BTH Long Stem model adds an extended stem length ideal for vessels with steep deadrise or thicker cored hulls.

Available models:

• BTH Tri Long Stem with Fairing Block

• BTH Tri (B744V Housing)

Key Features

• Dual‑frequency (200/50 kHz) sonar compatibility for broad depth coverage

• Maximum power output of 600 W for strong sonar returns

• Works with Raymarine DSM30 and DSM300 sounder modules

• Compatible with wood and fiberglass hulls

• Self‑sealing paddle wheel insert for easy maintenance

• Includes a high‑speed fairing block to improve flow and accuracy

• 10 m (30 ft) cable with factory‑installed connector

• 2‑inch hole diameter for installation

• Accurate depth, speed, and temperature measurement

• Durable and hydrodynamic housing designs for dependable results

Model Comparison

What’s in the Box

BTH Tri Long Stem with Fairing Block:

• BTH Tri Long Stem Transducer with 10 m Cable

• High‑speed Fairing Block

• Mounting Hardware

• Installation Instructions

BTH Tri (B744V Housing):

• BTH Tri B744V Transducer with 10 m Cable

• High‑speed Fairing Block

• Mounting Hardware

• Installation Instructions