XSONIC Airmar B150M (20°)

The XSONIC Airmar B150M (20°) transducer from Airmar is a CHIRP through-hull bronze transducer. It is designed for underwater detection in fresh and salt water, in shallow to medium depths, and provides depth and temperature data.

This transducer uses CHIRP mid-frequency technology, providing clear target resolution and improved fish separation thanks to a wide bandwidth.

The XSONIC Airmar B150M (20°) transducer operates across a mid-frequency range from 95 kHz to 155 kHz, providing a total bandwidth of 60 kHz.

The XSONIC Airmar B150M (20°) transducer has an output power of 300 Watts.

It can detect fish and reach a maximum depth of 183 meters (600 feet).

The XSONIC Airmar B150M (20°) transducer provides simultaneous depth and water temperature data with a fast response.

The transducer offers a variable beam width from 26° to 17° across its frequency range, optimizing underwater coverage.

The bronze housing of the XSONIC Airmar B150M (20°) depth sounder transducer is recommended for fiberglass or wood hulls.

This transducer is designed with a 20° tilted element to correct deadrise angles. It is suitable for hulls with a deadrise angle between 16° and 24° at the mounting location.

No, it is strongly advised against installing a transducer with a bronze housing in a metal hull. This could lead to electrolytic corrosion.

The diameter of the hole to drill depends on the type of hull:

For the outer hull: 51 mm (2 inches). For the inside of a fiberglass sandwich hull: 60 mm (2-3/8 inches). A pilot hole of 3 mm (1/8 inch) is also required.

For installation, you will need:

Safety glasses, dust mask, and hearing protection. A digital angle finder or level. An electric drill with a 10 mm (3/8") or larger chuck. A 3 mm (1/8") drill bit. A hole saw (51 mm or 60 mm depending on the hull). Sandpaper. Mild household detergent or a weak solvent (such as alcohol). Marine sealant (suitable for below the waterline). Cable ties. Water-based antifouling paint (mandatory in saltwater).

For optimal performance, choose a location where:

The water under the hull is smooth, with minimal bubbles and turbulence, especially at high speed.
The transducer will remain continuously immersed in water.
The transducer beam will not be obstructed by the keel or propeller shafts.
The area is away from interference sources (propeller, other machinery, other sounders, cables).
For a CHIRP sounder, the location must be cool and well-ventilated, away from the engine, to prevent overheating.

Yes, it is recommended to apply an antifouling coating such as Foulfree. Airmar certifies that applying this type of coating does not reduce transducer performance and helps prevent marine growth adhesion, ensuring optimal performance.

The XSONIC Airmar B150M (20°) transducer is supplied with a 10-metre (33-foot) cable.

The transducer is equipped with a 9-pin connector for connection to your electronic equipment.

When installing a CHIRP transducer, it is essential to follow these precautions:

Always operate the transducer in water. Operating it in air can cause overheating and lead to transducer failure.
Do not install the transducer in the engine compartment or any other hot area, as overheating can damage the transducer.
Ensure smooth water flow under the hull, free of bubbles or turbulence, for accurate readings.

For correct alignment, the 20° tilt angle of the transducer must match the hull deadrise angle at the mounting location (between 16° and 24°). An arrow on the top of the transducer must point toward the keel or the boat’s centerline. This ensures the internal element is correctly oriented downward for accurate readings.

No, solvents must never be used to clean the transducer. Cleaners, fuels, sealants, paints, and other products may contain solvents that can damage plastic parts, especially the transducer face.

The XSONIC Airmar B150M (20°) transducer is designed for underwater detection in shallow to medium waters. With a maximum detection depth of 183 meters (600 feet), it is highly effective for fishing in these conditions.