Airmar B175H Bronze 20-Degree 1kW Thru-Hull Transducer

The Airmar B175H Bronze 20-Degree 1kW Thru-Hull Transducer is a high-frequency CHIRP transducer that sweeps from 130 to 210 kHz. That gives 80 kHz of total bandwidth from one transducer. The beam narrows from 15 to 9 degrees across the sweep for sharp target separation.

CHIRP gives much more detail than single-frequency sonar, so you can tell individual baitfish, gamefish and structure apart. High frequency is best for shallow and mid-depth fishing, where bottom detail and target separation matter most. A fast-response water temperature sensor is built in.

The ceramic element sits at a fixed 20 degree tilt inside the housing, which suits hulls with 16 to 24 degree deadrise. With the transducer mounted nearly flush, that tilt cancels out the hull angle and points the beam straight down for the strongest echo returns. It runs at 1 kW and suits boats up to about 36 ft. Airmar's Xducer ID technology lets a compatible fish finder recognize the transducer and set itself up automatically. This model needs a separate Airmar Mix and Match cable for your brand of display, sold separately. If you change electronics brands later, you can leave the transducer in the hull and just swap the cable. The bronze housing is for fiberglass or wood hulls, so check your hull material before ordering. A thru-hull install means drilling the hull, so many owners have it done at haul-out by a qualified installer. Other transducers are in our marine transducers section.

• CHIRP from 130 to 210 kHz.
• Sharp target separation.
• 20 degree tilt, 1 kW.
• Built-in temperature sensor.