The Airmar R109LM is the hard-core performer in the CHIRP thru-hull transducer lineup, built for commercial fishermen, charter captains, and serious tournament anglers who demand maximum depth penetration and target resolution. A single installation delivers 87 kHz of total bandwidth across two CHIRP bands — Low (38–75 kHz) and Medium (80–130 kHz) — enabling bottom detection to 3,000 m (10,000 ft) with five to ten times the detail of conventional sonar. The urethane housing with high-performance fairing suits fiberglass, wood, and metal hulls 40 ft and above, and Xducer ID technology ensures seamless compatibility with supported displays.

Specifications:

• Low CHIRP band: 38–75 kHz; 19° to 10° port-starboard beamwidth, 10° to 5° fore-aft beamwidth
• Medium CHIRP band: 80–130 kHz; 13° to 8° beamwidth
• Total bandwidth: 87 kHz from a single transducer
• Covers popular fishing frequencies: 38, 50, 88, and 107 kHz, plus all frequencies within the bandwidth
• Maximum depth capability: 3,000 m (10,000 ft)
• Built-in depth and fast-response water-temperature sensor
• Fishing profile: Commercial and recreational inshore and offshore fishing, including deep-water canyon and sea-mount tracking
• Transducer housing: Urethane with high-performance fairing
• Minimum boat size: 12 m (40 ft) and above
• Compatible hull types: Fiberglass, wood, or metal
• Hull deadrise: 0° to 25°
• Acoustic window: Epoxy/urethane
• Weight: 15.1 kg (33.3 lb)
• Exclusive Xducer ID® technology
• Connection: Bare wires

This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.

⚠️ 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.