Airmar R509C-LH Transducer CHIRP Dual Frequency 33 Foot Cable

Overview

Built for serious inshore and offshore anglers running boats 40 feet and larger who need the range, target separation, and frequency flexibility that only a professional-grade CHIRP transducer delivers. If you're fishing deep-water canyons, seamounts, or running long distances to structure, this transducer is engineered to perform when conditions get demanding.

The R509C-LH is a dual-frequency CHIRP transducer with 25 ceramic elements and adjustable beamwidth on both channels — meaning you get extreme range on low frequency, surgical precision on high frequency, and the ability to adapt your sonar footprint to the structure you're hunting. This is the tool you choose when standard transducers leave you guessing.

Key Features

• Dual-Frequency CHIRP — 28–60 kHz low and 130–210 kHz high — gives you 1,500+ feet of bottom-tracking range on low frequency for deep water, plus crisp target definition on high frequency where it matters most for fish separation.
• Adjustable Beamwidth (9° to 23° low, 4° to 8° high) — narrows your sonar cone to focus on tight structure or widens it to cover more water during search mode — you control the footprint based on what the water demands.
• 25 Broadband Ceramic Elements — deliver consistent, reliable performance across the full frequency range in salt, fresh, and extreme depths without the noise and dropout that plague cheaper designs.
• Fast-Response Water-Temperature Sensor — integrated temperature probe updates quickly enough to track thermoclines and baitfish migrations in real time.
• Exclusive Transducer ID — allows your compatible fish finder to optimize sonar processing and gain settings automatically for this specific transducer — no manual tuning needed.

Specs & What's Included

Compatibility: This transducer works with any Airmar-compatible fish finder head unit (Humminbird, Lowrance, Simrad, and others that accept R-series transducers). It is wired with a 33-foot cable and no connector, meaning installation requires direct hardwiring to your fish finder's transducer input — plan accordingly for your install. Not sure if this works with your setup? Call or text us at (833) 831-4077 — we'll tell you straight.

Hull: Mounts on fiberglass, wood, or metal hulls via transom or thru-hull installation depending on your boat configuration.

In the Box: R509C-LH transducer with 33-foot cable (no connector).