The Airmar 509LHW is a dual-frequency thru-hull transducer built for serious offshore fishing. Covering four of the most common fishing frequencies — 28, 38, 50, and 200 kHz — it delivers up to 3 kW of power with narrow low-frequency beams for deep-water penetration and wide high-frequency beams for performance in shallow water. Rated to 10,000 feet, this transducer suits a broad range of hull deadrises and installs with included instructions.

Specifications:

• Operating Frequency: 28–60 kHz and 150–250 kHz
• Power Output: 2–3 kW
• Maximum Depth: 10,000 feet
• Beamwidth: 5×9 to 11×23 degrees (low frequency) or constant 25 degrees (high frequency)
• Deadrise Range: 0–25 degrees
• Optimized for fishing frequencies: 28, 38, 50, and 200 kHz
• Narrow low-frequency beam for deep-water performance
• Wide high-frequency beam for shallow-water performance
• Installation instructions included

Resources:

• Owner's Manual (PDF)
• Product Brochure (PDF)

⚠️ California Prop 65 Warning: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.