Discontinued
This product has been discontinued by Garmin and is no longer available to buy.
Garmin
Garmin R109LH CHIRP Dual Range Depth and Temperature Transducer
010-11642-20
The Garmin R109LH is a 2 kW broadband CHIRP thru-hull transducer with dual 38-75 kHz and 130-210 kHz bands. Its narrow-beam 16-element array delivers exceptional deep-water detail to 8,000 ft and pairs with the Garmin GSD 26 sonar module.
Description
The Garmin R109LH is a high-power CHIRP thru-hull transducer built around a 16-element broadband ceramic array. It transmits across two bands, 38 to 75 kHz on the low channel and 130 to 210 kHz on the high channel, giving 117 kHz of total bandwidth from a single transducer. Rather than the two fixed frequencies of traditional sonar, the CHIRP sweep returns crisp target separation and bottom definition at depths a conventional transducer cannot reach.
With 2 kW of transmit power the R109LH sounds to 8,000 ft, the low band reaching 6,000 ft and the high band 1,500 ft. Its narrow beam at both frequencies concentrates energy on the target for clean deep-water imaging. The urethane housing installs as an external thru-hull with a High-Performance Fairing and suits fibreglass, wood or metal hulls up to 22 degrees deadrise on vessels of 12 m and above. An integral depth and fast-response temperature sensor is built in. The transducer terminates in bare wires and requires the Garmin GSD 26 CHIRP sonar module, which connects to networked GPSMAP chartplotters.
PRODUCT DETAILS
- Broadband CHIRP transducer sweeping 38-75 kHz (low) and 130-210 kHz (high) for sharp target separation from the surface to extreme depth
- 2 kW of transmit power with 117 kHz of total bandwidth from a single 16-element ceramic array
- Very narrow beam at both frequencies (low 19-10 deg, high 8-4 deg) for outstanding deep-water bottom and water-column detail
- Rated to 8,000 ft, with the low band sounding to 6,000 ft and the high band to 1,500 ft
- External thru-hull mount with High-Performance Fairing, suited to fibreglass, wood or metal hulls up to 22 deg deadrise on boats 12 m (40 ft) and above
- Integral depth and fast-response water-temperature sensor
- Requires the Garmin GSD 26 CHIRP sonar module and connects to networked GPSMAP chartplotters
- R109LH thru-hull transducer with 49 ft (15 m) bare-wire cable
- High-Performance Fairing
- Installation instructions
No exploded diagram available for this product.
No compatible transducers listed for this product.
No spares or accessories listed for this product.
Sonar
| Sonar type | Broadband CHIRP, dual-band Low and High (Spread Spectrum with CHIRP technology) |
| Frequency – Low band | 38 to 75 kHz |
| Frequency – High band | 130 to 210 kHz |
| Total bandwidth | 117 kHz from one transducer |
| Transmit power | 2 kW |
| Maximum depth | 8,000 ft (Garmin rated). Low band to 1,829 m (6,000 ft); high band to 457 m (1,500 ft) |
Beam
| Beamwidth – Low band | 19 to 10 degrees port-starboard, 10 to 5 degrees fore-aft |
| Beamwidth – High band | 8 to 4 degrees |
Mounting
| Mount type | Thru-hull, external mount with High-Performance Fairing |
| Supported deadrise | Hulls up to 22 degrees deadrise (Garmin lists 0 to 25 degrees with fairing) |
| Recommended boat size | 12 m (40 ft) and above |
| Hull / engine suitability | Fibreglass, wood or metal hulls; inboard, outboard or I/O engines |
Physical
| Housing material | Urethane transducer housing with High-Performance Fairing |
| Element configuration | 16 internal broadband ceramic assemblies |
| Temperature sensor | Yes – depth and fast-response water-temperature sensor |
Connectivity
| Connector | Bare wires (terminates to the Garmin GSD 26 sonar module) |
| Cable length | 49 ft (15 m) |
Compatibility
| Sonar module required | Requires the Garmin GSD 26 CHIRP sonar module. Listed under "Spread Spectrum with CHIRP Technology Transducers for use with the Garmin GSD 26". Connects to networked GPSMAP chartplotters via the Garmin Marine Network. |
General
| In the box | R109LH thru-hull transducer with 49 ft (15 m) bare-wire cable, High-Performance Fairing and installation instructions |
No videos available for this product.
Does the R109LH need a separate sonar module?
Yes. The R109LH is a 2 kW bare-wire CHIRP transducer that requires the Garmin GSD 26 CHIRP sonar module. The GSD 26 connects to networked GPSMAP chartplotters via the Garmin Marine Network; the transducer will not run from a chartplotter's built-in sonar.
What frequencies and power does the R109LH use?
It is a dual-band CHIRP transducer covering 38 to 75 kHz on the low channel and 130 to 210 kHz on the high channel, with 117 kHz of total bandwidth and 2 kW of transmit power.
How deep can the R109LH sound?
It is rated to 8,000 ft. The low band reaches approximately 6,000 ft and the high band approximately 1,500 ft, depending on water conditions.
How is the R109LH mounted?
It is an external thru-hull transducer fitted with a High-Performance Fairing. It suits fibreglass, wood or metal hulls up to 22 degrees deadrise on boats of 12 m (40 ft) and above.
Does the R109LH measure water temperature?
Yes. It includes an integral depth reading and a fast-response water-temperature sensor.
