Furuno B285M Medium-Frequency CHIRP Transducer w/Temperature - Bronze Thru-Hull w/High Speed Fairing Block

The Furuno B285M Medium-Frequency CHIRP Transducer with Temperature is purpose-built for serious anglers and boaters who demand reliable, high-resolution sonar in freshwater and saltwater environments. This bronze thru-hull transducer represents the workhorse choice for vessels where durability and consistent bottom-tracking matter most. Whether you're targeting structure on inland lakes or working offshore grounds, the B285M delivers the precise target separation and fish detection you need to locate productive water fast.

The medium-frequency CHIRP technology produces sharp, detailed sonar imagery by sweeping across a range of frequencies rather than pulsing a single frequency, resulting in superior target definition and reduced noise interference. The integrated temperature sensor provides real-time water temperature data—critical for understanding seasonal fish behavior and thermocline location. The high-speed fairing block minimizes turbulence and cavitation at cruising speeds, ensuring clean sonar returns even at plane. Bronze construction resists corrosion in salt water and stands up to years of continuous duty without degradation, while the thru-hull mounting design integrates seamlessly into most transducer assemblies.

Professional guides, charter operators, and dedicated weekend anglers trust Furuno transducers for their reliability and consistent performance across all conditions. Installation requires a thru-hull opening and is compatible with Furuno multifunction displays and sounder units that support medium-frequency CHIRP inputs. Before purchase, verify compatibility with your existing chartplotter or sounder model and confirm the transducer socket type matches your display unit's connector specifications. The B285M's robust design makes it ideal for boats spending extended time on the water where equipment failure is not an option.