Airmar B150M – Bronze Through-Hull 300W (95-155kHz) Transducer with Tilted Element (20°) + Temperature – (8-Pin)

The Garmin Airmar B150M is a 300W bronze through-hull transducer. It uses CHIRP technology over a mid-frequency range of 95-155 kHz. It features a 20° tilted element to compensate for hull drift angle and provides depth and water temperature data. It is equipped with an 8-pin connector.

The B150M transducer operates on a CHIRP mid-frequency range from 95 kHz to 155 kHz, providing a total bandwidth of 60 kHz.

Under optimal conditions, the Airmar B150M depth sounder can reach a maximum depth of 183 metres (600 feet).

Yes, the Airmar B150M transducer is equipped with a fast-response water temperature sensor.

The B150M transducer provides a beam width ranging from 26° to 17° depending on the frequency used.

The bronze housing of the B150M transducer is recommended for fiberglass or wooden hulls. It must never be installed on a metal hull due to the risk of electrolytic corrosion.

The B150M depth sounder is designed with a 20° tilted element, making it specifically suitable for hulls with a deadrise angle between 16° and 24° at the mounting location.

No, the Airmar B150M transducer has a bronze housing and must never be installed on a metal hull. This would cause electrolytic corrosion.

The Airmar B150M transducer is equipped with an 8-pin connector, compatible with Garmin devices.

For a fiberglass or wood hull, the hole diameter to drill from the outside of the hull is 51 mm (2 inches). If the fiberglass hull is cored, the hole diameter for the inside of the hull is 60 mm (2-3/8 inches).

On a planing hull boat, the depth sounder must be installed at the very rear, on or near the centerline, and well within the first set of lifting strakes. This ensures the transducer remains in contact with the water at high speed. The starboard side of the hull, where the propeller blades move downward, is generally preferred.

No, the B150M transducer’s Tilted Element™ design, with its 20° tilted element inside the housing, compensates for the hull’s drift angle. This eliminates the need for an external fairing block, ensuring the sonar beam is directed straight to the bottom.

The arrow on the top of the transducer must point toward the keel or the central axis of the boat. This orientation ensures the internal element of the transducer is correctly aligned with the hull's drift angle.

Installing the CHIRP transducer in the engine compartment or any other hot area is not recommended, as the transducer may overheat and fail.

For installation, you will need safety glasses, a dust mask, hearing protection, an angle finder, an electric drill, a 3 mm (1/8") drill bit, a hole saw (51 mm or 2" for the exterior, 60 mm or 2-3/8" for the interior of foam-core hulls), sandpaper, a mild detergent or weak solvent (such as alcohol), and marine sealant suitable for use below the waterline. For foam-core fiberglass hulls, fiberglass cloth, resin or a cylinder, wax, tape, and casting epoxy may also be required.

Yes, applying water-based antifouling paint is mandatory on the depth sounder if the boat is used in saltwater. Only water-based antifouling paints must be used.

It is imperative to immediately check for any leaks once the boat is launched. Do not leave the boat unattended for more than three hours, as even a small leak can lead to significant water accumulation.