Airmar B75H - Bronze through-hull transducer 600W CHIRP (130-210kHz) with 20° tilted element + temperature - (8-pin)

The Garmin Airmar B75H is a 600 W bronze CHIRP through-hull transducer. It operates on a high-frequency band (130–210 kHz) and features a 20° tilted element. It provides depth and water temperature data via an 8-pin connector.

The Airmar B75H transducer operates on a CHIRP high-frequency band, ranging from 130 kHz to 210 kHz.

The B75H depth sounder is designed to measure water depth and water temperature.

The Airmar B75H depth sounder housing is made of bronze.

The Airmar B75H depth sounder comes with a 10-metre (33-foot) cable.

The beam width of the B75H transducer ranges from 15° to 9° across its high-frequency range (130–210 kHz).

Yes, the B75H transducer uses CHIRP technology. This technology provides superior target separation and improved resolution of seabed details compared to fixed-tone transducers.

The Garmin Airmar B75H transducer is designed to be compatible with Garmin systems featuring an 8-pin connector.

The bronze housing of the Airmar B75H transducer is recommended for fiberglass or wooden hulls. It must never be installed on a metal hull, as this could cause electrolytic corrosion.

The B75H is a 20° tilted-element transducer. It is specifically designed to compensate for deadrise angles of hulls ranging from 16° to 24°, ensuring the acoustic beam is vertically oriented for optimal performance.

No, never install a metal housing, such as the bronze one on the B75H, on a vessel with a positive ground system. This is a precaution to prevent electrolytic corrosion.

When installing the depth sounder, it is imperative to wear safety goggles, a dust mask, and hearing protection to ensure your safety.

The hole size depends on hull type:

For a fiberglass or wooden hull, drill a 70 mm (2-13/16") hole from the outside of the hull.For a cored fiberglass hull, a 70 mm (2-13/16") hole is required on the outside of the hull, and an 80 mm (3-1/8") hole on the inside of the hull.

The transducer must be installed in a location where water flows smoothly, with minimal bubbles and turbulence, especially at high speed. It must remain continuously submerged, and its beam must not be obstructed by the keel or propeller shaft. Avoid areas near water intakes or discharges, seams, fittings, or other hull irregularities that could disrupt water flow.

No, CHIRP transducers, such as the B75H, generate more heat than traditional transducers. It is crucial to install the transducer in a cool, well-ventilated location, away from the engine compartment or other heat sources, to prevent overheating that could lead to failure.

Yes, applying water-based antifouling paint is mandatory in saltwater to prevent marine growth. Marine growth on the transducer can negatively impact sonar performance. Airmar certifies that applying Foulfree coating on its transducers does not result in any loss of performance.

The arrow on the top of the transducer must point toward the keel or the boat's centerline. This orientation is essential to align the internal element's angle of the transducer with the deadrise angle of your hull.

No, the transducer must always operate underwater. Using the depth sounder in air can cause overheating, potentially leading to failure.

For the installation of the B75H transducer, it is recommended to use a high-quality marine sealant, specifically designed for use below the waterline, to ensure perfect and durable watertightness.