XSONIC Airmar PM275LH-W

The XSONIC Airmar PM275LH-W is a dual-band CHIRP 1 kW transducer designed for sport and commercial vessels 8 m (25 ft) and longer. It provides detailed depth detection and rapid water temperature measurement. It uses a pocket-mount design with a bronze housing and urethane acoustic window.

The PM275LH-W transducer operates on two distinct frequency bands:

A low-frequency band (LH) from 42 to 65 kHz.A high-frequency band (W) from 150 to 250 kHz.This combination provides full coverage from 123 kHz using a single transducer.

The XSONIC Airmar PM275LH-W transducer has an output power of 1 kW.

Maximum detection depth varies depending on the frequency band used:

On low-frequency band (42-65 kHz), it can reach a maximum depth of 914 meters (3000 feet). On high-frequency band (150-250 kHz), it offers a maximum depth of 152 meters (500 feet).

Yes, the XSONIC Airmar PM275LH-W transducer is equipped with a sensor that enables fast and accurate water temperature measurement.

The PM275LH-W transducer offers different beam widths depending on the frequency band:

The low-frequency band (42–65 kHz) has a variable beam width ranging from 25° to 16°. The high-frequency band (150–250 kHz) maintains a constant beam width of 25° across the entire range.

The XSONIC Airmar PM275LH-W transducer is a "pocket-mount" model. This means it is designed to be installed in a cavity (pocket) integrated into or created in the hull of the vessel, so that its face is flush with the hull bottom.

The XSONIC Airmar PM275LH-W transducer housing is made of bronze and features an acoustic window in urethane.

The XSONIC Airmar PM275LH-W transducer is supplied with a 10-metre (33-foot) cable.

The PM275LH-W transducer is compatible with Simrad, Lowrance, and B&G CHIRP systems that support CHIRP transducers and have 9-pin XSONIC ports. It specifically requires an NSSevo3S or S5100 sonar module.

The PM275LH-W transducer is equipped with two 9-pin black XSONIC-type connectors.

No, the XSONIC Airmar PM275LH-W transducer is a dual-band CHIRP transducer. It is designed to work specifically with CHIRP-compatible sonar systems, such as the NSSevo3S or the S5100 sonar module, to fully exploit its detection capabilities.

Given that the transducer housing is made of bronze, it is recommended for installations on fiberglass or wooden hulls. It must never be installed on a metal hull due to the risk of electrolytic corrosion.

During installation, it is mandatory to wear safety glasses, a dust mask, and hearing protection. After launching the boat, immediately check for any leaks and do not leave the boat unattended for more than three hours. It is also critical never to pull, carry, or hold the transducer by its cable, as this could sever internal connections.

For optimal performance, ensure that:

Water flow under the hull is smooth, with minimal bubbles and turbulence, especially at high speed.The transducer is continuously submerged at all speeds.The transducer beam is not obstructed by the keel or propeller shaft.The location is chosen away from interference sources (propeller, machinery, other fishfinders, cables).The deadrise angle is minimal so the beam is directed toward the bottom.

Yes, applying a coating such as Foulfree is highly recommended. Airmar certifies that using Foulfree on its transducers does not result in any loss of performance. This non-toxic and ultra-smooth coating prevents marine growth from adhering to the surface, which can negatively impact sonar performance by creating noise or reducing image detail.

Once applied and cured, the Foulfree coating can protect the transducer surface from marine fouling for up to two years.

A 15 ml tube of Foulfree is sufficient to cover a surface area of one square foot (approximately 0.09 m²). The required quantity will depend on the specific surface area of your transducer.

No, the XSONIC Airmar PM275LH-W transducer does not include a built-in sonar module. It is an accessory that requires an external compatible sonar module, such as the NSSevo3S or S5100, to operate.

Apply a 2 mm (1/16") thick layer of marine sealant around the flange and along the side wall of the housing. The sealant should extend 6 mm (1/4") higher than the combined thickness of the hull, washer, and hull nut to ensure proper sealing and keep the hull nut in place.