XSONIC Airmar CM275LH-W

The XSONIC Airmar CM275LH-W is a 1 kW dual-channel CHIRP transducer designed to provide detailed underwater imaging and advanced sonar performance.

This transducer is specifically designed for installation on sport and commercial fishing vessels 8 metres in length and above.

The transducer operates on two frequency bands:

A low band (Low) from 42 to 65 kHz. A high band (High-Wide) from 150 to 250 kHz.

For the low-frequency band (42–65 kHz), it enables precise tracking of the seabed down to 914 meters depth. For the high-frequency band (150–250 kHz), the maximum range is 152 meters, optimized for superior resolution in the upper water column.

The CM275LH-W is a transducer designed for tank installation (cavity-mount). It is specifically designed to be mounted in a cavity or welded tank.

The transducer housing is made of seamless SEALCAST™ urethane, ensuring high durability in the marine environment.

The transducer is supplied with a 10-metre (33 ft) cable.

The transducer is equipped with two 9-pin black connectors.

To operate, the XSONIC Airmar CM275LH-W transducer requires an NSSevo3S or S5100 sonar module.

During installation, it is mandatory to always wear safety glasses, a dust mask, and hearing protection. After launching the boat, immediately check for leaks and do not leave the boat unattended for more than three hours.

Choose a location where the water flow under the hull is smooth, with minimal bubbles and turbulence, especially at high speed. The transducer must remain constantly immersed, and its beam must not be obstructed by the keel or propeller shaft. Avoid interference sources such as propellers, machinery, other depth sounders, or other cables. Ideally, select an area with minimal deadrise angle.

Yes, thanks to its low-frequency band (42–65 kHz), which allows seabed tracking down to 914 m, it is particularly suited to deep-sea fishing and fish detection at great depths.

Yes, its high-frequency band (150–250 kHz) with a constant 25° beam is optimized for superior resolution in the upper water column and shallower depths, ensuring wide coverage and effective fish detection in shallow water.

For the low-frequency band (42–65 kHz), the beam angle varies from 25° to 16°. For the high-frequency band (150–250 kHz), the beam angle is constant at 25°.

Yes, applying a water-based antifouling coating is mandatory in salt water to maintain optimal transducer performance. The Foulfree coating, certified by Airmar, is recommended as it prevents marine fouling adhesion without affecting transducer performance and can provide up to two years of protection.

To assemble the connector with the removable nut, pass the cable/connector through the 21 mm (13/16") diameter hole. Slide the nut onto the connector, then insert the wedge tool into the slot of the split ring and slide it until its square end aligns with the wider edge of the split ring. Slide the split ring and wedge tool onto the connector body until they align with the mounting groove. Remove the wedge tool and seat the split ring in the mounting groove, ensuring the connector’s protrusion fits into the slot. Finally, slide the nut forward until it stops at the connector and rotate it until the internal protrusions align with the split ring’s grooves, then snap it into place.

The CM275LH-W housing is made of urethane. Plastic housings (including urethane) are generally recommended for fiberglass or metal hulls only. Installing a plastic housing in a wooden hull is not advisable, as wood swelling could crack the plastic.

In the XSONIC Airmar CM275LH-W name, "LH-W" indicates that the transducer is equipped with dual-channel CHIRP capabilities, covering Low (low) and High-Wide (high and wide) frequencies.

The XSONIC Airmar CM275LH-W transducer is designed to work with specific fishfinder modules to ensure optimal performance. For its use, you will need one of the following modules:

NSSevo3SS5100 Sonar ModuleThese modules are essential for compatibility and proper operation of your transducer.

The XSONIC Airmar CM275LH-W transducer is a 1 kW CHIRP sonar with advanced underwater detection capabilities. Key technical specifications include:

Power: 1 kWCHIRP type: Dual channel (Low/High-Wide)Low frequencies:Range: 42 to 65 kHzBeam angle: Variable from 25° to 16°Max depth: Up to 914 metersHigh frequencies:Range: 150 to 250 kHzBeam angle: Constant at 25°Max depth: Up to 152 metersHousing material: Urethane (SEALCAST™)Connectors: Two 9-pin black connectorsCable length: 10 meters (33 feet)Mounting type: Designed for tank or welded tank installation.