Skipper's Locker

Furuno B175M/20 CHIRP Transducer, Bronze Thru-Hull

Brand:
Furuno
Part no:
B175M/20

Where to buy

Specifications

Mount
Thru-hull
Material
Bronze
Frequency
Chirp
Also measures
Temperature
Connector
10-pin

The Furuno B175M/20 is a medium-frequency CHIRP transducer that also reports water temperature. It is a bronze thru-hull unit with a 20 degree tilt, so it installs through the hull rather than on the transom. The power rating is 1 kW, and the unit comes with a 12 meter cable ending in a 10-pin connector, so confirm your sounder takes that connector.

Our take

This bronze thru-hull transducer is made with a 20 degree tilt, so that angle is the first thing to match to your hull. It also reports water temperature, and its 12 meter cable ends in a 10-pin connector your sounder has to accept.

From our buying guide

Raymarine's general guidance is 200 kHz for water under about 60 m (200 ft) and 50 kHz for deep water. In-hull transducers avoid a hole, but lose performance and need a solid fiberglass bottom.

Check before you buy:

  • The housing suits your hull. Airmar and Raymarine rule out plastic on a wood hull and bronze on a metal one.
  • It connects to your display, since an analog transducer needs an interface.
  • A through-hull will be fitted to the maker's guide. Garmin says its own should be installed by a qualified marine installer.

Sources