Airmar DT820BV-235-N2 235 kHz Low Profile Tilted Element™ Smart™ Sensor 20° Tilt Bronze NMEA 2000

The Airmar DT820BV-235-N2 235 kHz Low Profile Tilted Element Smart Sensor 20° Tilt Bronze NMEA 2000 is a professional-grade marine sonar transducer engineered for vessels requiring high-frequency imaging and reliable navigation in tactical or remote maritime operations. This low-profile sensor integrates seamlessly into hull-mounted or transom-mounted configurations where space constraints or stealth profiles are critical, making it ideal for law enforcement marine patrols, military reconnaissance, and commercial survey applications. The 20° tilted element design optimizes beam geometry for bottom tracking and fish detection without requiring excessive deadrise compensation.

Built with a bronze thru-hull housing rated for extended saltwater exposure, the DT820BV uses Airmar's proven Tilted Element and broadband technologies to deliver superior target resolution and clutter rejection across variable water conditions. The Smart Sensor architecture integrates signal conditioning and impedance matching directly at the transducer, reducing EMI susceptibility and improving data integrity over long NMEA 2000 cable runs—a critical advantage in harsh maritime environments where electromagnetic noise can degrade sonar performance. The 235 kHz frequency provides the ideal balance between range capability and high-definition bottom mapping, with effective operating depths to 2,000+ feet depending on water clarity and temperature profile.

Operators managing dedicated patrol vessels, research platforms, or interception craft benefit from this sensor's robust NMEA 2000 networking, allowing real-time sonar integration with compatible chart plotters, autopilot systems, and multi-function displays from Garmin, Simrad, and other major manufacturers. Installation requires a minimum 8-inch thru-hull aperture with proper sealant and backing plate reinforcement; bronze construction ensures corrosion resistance and extended service life in saltwater and brackish environments. Weighing 3.8 lbs with compact dimensions of 8 × 4 × 10 inches, the unit minimizes displacement and hydrodynamic signature while maintaining the acoustic performance required for precision navigation and target acquisition.