Airmar DT800L-235-N2 Bronze Long-Stem Retractable Thru-Hull Depth & Temperature Smart Sensor NMEA 2000

The Airmar DT800L-235-N2 is a long-stem, low-profile, retractable thru-hull transducer that combines depth and fast-response water temperature sensing in a single bronze housing. Built on Airmar's proven Tilted Element and Broadband technologies, this Smart™ Sensor integrates the transducer element and signal processor within millimeters of each other inside the housing—delivering strong echo returns, accurate depth readings, and clean data output across any compatible NMEA 2000 network or display.

The long-stem design makes this transducer well-suited for thick-hulled vessels, wooden boats, and craft with steeper hull deadrise angles. The ceramic element is internally tilted to compensate for hull deadrise and orient the sonar beam straight down, ensuring accurate bottom readings even on challenging hull geometries. A built-in water valve minimizes water ingress when the retractable insert is removed for servicing or winterization.

Key Features:

• Depth and fast-response water temperature sensing in one thru-hull fitting
• Airmar Smart™ Sensor technology — transducer element and signal processor integrated within the housing
• Tilted element design compensates for hull deadrise, directing beam straight down
• 235 kHz frequency prevents mutual interference with other echosounders on the vessel
• Retractable insert with self-closing water valve for easy servicing and safe storage
• NMEA 2000 output via standard Micro connector — compatible with any NMEA 2000 network
• Low-profile bronze housing does not affect hull performance at high speeds
• Compatible with optional high-performance fairing block for extended deadrise range

Specifications:

• Housing Material: Bronze
• Connector: NMEA 2000 Micro
• Cable Length: 6 m (20 ft)
• Frequency: 235 kHz
• Beam Angle: 12°
• Power Rating: 100 W RMS
• Depth Range: 0.5 m to 183 m (1.6 ft to 600 ft)
• Tilt Angle: 0°
• Deadrise Range: Up to 12° without fairing; up to 28° with fairing
• Usable Shaft Length: 102 mm (4.0 in)
• Hole Size Required: 51 mm (2 in)
• Temperature Accuracy: ±0.5°C (±1.8°F)
• Water Temperature Range: -10°C to 40°C (14°F to 104°F)
• Voltage: 9 to 16 VDC
• Data Update Rate: 1x per second
• Acoustic Window: Urethane
• Compatible Hull Materials: Fiberglass or wood
• Country of Origin: USA