Transdutor de Casco Navico XSonic Airmar R509LH-W

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The Fishfinding Revolution is Here!


Airmar’s new Broadband transducers represent the next generation of technology that will allow fishermen to unlock new secrets in fishfinding. These transducers are designed for 

use specifically with Broadband, CHIRP, FM, and Spread-Spectrum fishfinders.


CHIRP Fishfinders transmit across a wide frequency band instead of using a single frequency. This is also known as “Frequency Modulation” or “Spread-Spectrum” Transmissions. 

These waveforms are typically of long duration and for example may start at 42 kHz and end at 65 kHz. Energy transmitted into the water can be 10 to 50 times greater than a traditional fishfinder. By storing the shape of the transmitted waveform in memory and comparing it to the received echoes using pattern 

matching techniques (also called pulse compression), it is possible to find targets within the noise and precisely determine their range with astounding accuracy (see photo). 




Extreme target detail and image resolution at all depths

Precise separation between baitfish and gamefish

Bottom discrimination of fish laying on the seabed

Deep sounding accuracy down to 3,000 m (10,000’)

Ability to detect targets at greater depths & higher speeds

Ability to find targets within the noise (“snow” on the displa



More Energy on Target = Better Fish Detection


Traditional fishfinders 


transmit pulses at a single frequency  (such as 50 kHz and 200 kHz) and this pulse is often referred to  as a “tone burst”. These pulses can be of very high power but  are typically of very short duration and this limits the energy that 

can be transmitted into the water. 

With tone burst fishfinders  there is always the trade-off between pulse length and target  resolution. For example, if a fishfinder transmits a pulse that is 500  microseconds in duration, it has a pulse length of 0.7 m (2.4’).  With a tone burst, no targets can be resolved that are closer to  one another than the pulse length. So fish less than 0.7 m (2.4’)  apart will appear as a single large mass, and fish less than 0.7 m  (2.4’) from the bottom will appear attached to the sea bed and  will be difficult or impossible to detect. See graphic illustration  above. Longer pulse lengths at 50 kHz are typically used to put  more energy into the water to improve deep-water detection  but doubling the pulse length reduces target discrimination by  half thereby compromising resolution and detail. There is no ‘free lunch”



With CHIRP fishfinders, 


there is no trade-off between pulse length and target resolution. While CHIRP fishfinders may output less peak power than a conventional fishfinder, what really matters is the energy put into the water with each pulse. Wide band, 

frequency modulated pulses (130-210 kHz, for example) can be very long in duration and put 10-50 times more energy into the  water.

Unsurpassed target detection and resolution is achieved with digital signal processing using pattern matching techniques. With CHIRP fishfinders, the ability to determine the separation between 

fish and between fish and bottom can be a matter of inches as compared to several feet with traditional fishfinders. Closely grouped fish can now be shown as distinct targets instead of a single mass and show fish close to the bottom rather than being hidden. It is well known that different fish species and fish sizes return stronger echoes as certain frequencies. With traditional fishfinders operating at fixed frequencies(50k Hz and 200 kHz), fish echoes may be weak or not detected at all. Since CHIRP fishfinders transmit pulses over wide frequency bands, this maximizes fish detection capability




Depth and fast-response water-temperature sensor

3 kW 50kHz for superior deep-water performance from the low frequency

23° to 9° port-starboard beam

11° to 5° fore-aft beamw

Maximum depth performance to 3,048 m (10,000′)

1 kW high frequency: 150 to 250 kHz

25° constant beamwidth

Maximum depth performance of 152 m (500′)

132 kHz of total bandwidth from one transducer

Covers popular fishing frequencies of 38, 50, and 200 kHz plus everything else in the bandwidths

High frequency provides superior shallow-water performance, bottom detail, and fish-target separation

High wide beamwidth yields more coverage for detecting fish in the upper-water column

Urethane housing with fairing for optimal performance

Also available as a pocket/keel (CM599LHW) mount



Weight 20.8 kg (46 lb.)

Recommended Boat Length 9m (30′) and above

Hull Material Compatible with all hull materials

Hull Deadrise Up to 22°

Acoustic Window Epoxy/urethane

Includes Fairing and mounting hardware

Transducer Element 25 internal broadband ceramic assemblies

Peso 24,000 kg
Dimensões 33,0 × 70,0 × 43,0 cm


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