Airmar B175L Transducer CHIRP Bronze Thru-Hull 20°

Overview

Who This Is For: Anglers upgrading an existing fish finder system or building a custom sonar setup who need a reliable, mid-range thru-hull transducer. This transducer works best on boats where you're retrofitting or mixing components from different manufacturers — you get solid depth and temperature data without buying a complete system.

Product Summary: The B175L is a bronze thru-hull transducer that delivers stable CHIRP sonar in the 40–60 kHz range at 1kW power. It reads depth and water temperature, mounts flush or tilted through your hull, and pairs with compatible fish finders via a network or direct cable connection. It's built for serious anglers who know exactly what electronics they need and aren't locked into a single manufacturer's ecosystem.

Key Features

• CHIRP Sonar (40–60 kHz) — transmits a range of frequencies instead of a single tone, producing clearer target separation and structure detail — fish and bottom clutter won't blur together on your screen.
• 1kW Power Output — delivers enough punch to read structure and fish at realistic depths on lakes and coastal waters — adequate for most recreational fishing without overkill electrical demands.
• Bronze Thru-Hull Housing — corrosion-resistant construction rated for saltwater and freshwater — you won't worry about material degradation in harsh conditions or long layups.
• 20° Beam Angle — narrow cone focuses sonar energy directly below your boat for concentrated bottom detail — ideal if you're marking specific spots or reading tight structure like ledges and drop-offs.
• Flush and Tilted Mount Options — installs level with your hull or angled back to reduce turbulence and improve readings when underway — you can optimize the install for your hull design and typical cruising speed.
• Depth and Temperature Sensing — logs both critical data points on a single transducer — no need for separate temperature sensors if your display handles dual-function transducers.

Specs & What's Included

Compatibility: This transducer works with fish finders that accept CHIRP transducers in the 40–60 kHz band and support thru-hull mounts. Common compatible brands include Humminbird, Lowrance, Simrad, and Garmin — but verify your specific display unit before ordering, since networking standards vary. Not sure if this works with your setup? Call or text us at (833) 831-4077 — we'll tell you straight.

In the Box: Transducer head only. You will need to purchase a compatible cable separately — the product title specifies 'Needs Mix & Match Cable' because Airmar sells this as a transducer element, not a complete plug-and-play unit. Confirm your display's cable type and length before checkout.