Airmar DST820 Bronze Thru Hull Speed, Depth, and Temperature Sensor with NMEA 2000 and Bluetooth

DST820 Bronze Thru Hull - NMEA 2000 - 235kHz

The DST820 Smart Multisensor is the next evolution of Airmars industry-leading technology, replacing the DST810 and introducing PSTI compliance for enhanced onboard network security.

With its secure QR-code setup, connecting your DST820 has never been easieror safer. Simply scan the QR code and enter a one-time security password on your mobile device to protect your sensor on the network.

Featuring Airmars high-performance Gen2 paddlewheel, the DST820 delivers unmatched speed-through-water accuracy providing precise start-up data below 0.3 knots, linear accuracy from 0.6 knots, and stable, reliable readings all the way up to 45 knots.

Whether youre a day sailor, weekend cruiser, or tactical racer, accurate speed-through-water (STW) data helps you fine-tune sail trim and rig balance for maximum performance. For racers, precise STW readings enable accurate velocity made good (VMG) and target speed calculations, ensuring every tactical decision is data-driven.

Together, the DST820 and Airmars CAST app make speed calibration simpler than ever. The free CAST app provides powerful calibration toolsonce only available through costly PC-based softwarenow instantly accessible from your smartphone or tablet. Choose from basic or advanced calibration options to suit your needs.

Beyond speed, the DST820 measures depth and water temperature, and provides a 5.7 Hz (5 per second) speed output with improved resolution. Its integrated attitude sensor delivers heel and trim data, enabling heel-compensated speed calibration across multiple heel angles and speed rangesfast, intuitive, and completely independent of onboard instruments.

With depth tracking from 0.5 m (1.6 ft) to 100 m (328 ft), the DST820 also provides reliable depth data to help ensure you never run aground.

The result: industry-leading speed accuracy, wireless calibration convenience, and next-generation securityall in one powerful, compact sensor.

Features:

• The DST820 is fully compliant with UK PSTI security standards, ensuring that the connection between DST820 and a mobile device is secure.
• The industrys best speed paddlewheel DST820 features the Gen2 paddlewheel for industry-leading speed performance from 0.3 knots to 45 knots.
• Smoother Speed 5.7 Hz speed output (5X per second) for visibly smoother speed-through-water reporting and faster data for better decision making when every second counts.
• Integrated Attitude Sensor For heel and trim, and used in advanced speed calibration.

DST820 secure Bluetooth connectivity to Airmars CAST app provides the ability to:

• Calibrate the DST820 in a simple, intuitive way from your mobile device.
• Conduct basic and advanced heel-compensated speed calibrations for improved speed-through-water outputs across the speed range.
• Advanced speed calibration allows for manual speed entries for multiple heel angles and up to 10 speeds, formerly only possible through expensive PC software.

Specifications:

• Functions: Depth, Speed, Temperature, Attitude
• Mounting Style: Low Profile Thru-Hull
• Power Rating: 80 W
• Protocol Output: NMEA 2000
• Housing: Bronze
• Max Deadrise Angle: 22
• Hull Material: Fiberglass or metal
• Hole Size: 51 mm (2)
• Retractable housing: Yes
• Acoustic Window: Urethane
• Attitude Sensor: Yes
• Bluetooth Capable: YES Bluetooth BLE
• Cable-Length: 6 m (20) NMEA 2000 cable
• Certifications: CE
• Common Use: Cruising/Racing Sailboats, Leisure/Yachting, Fishing
• Conventional Beam: 10x44
• Data Rate: Depth: 1X/second, Speed: 5X/second, Heel/Trim: 10X/second
• Max Deadrise: Up to 22
• Max Depth: 0.5 m (1.6) to 100 m (330)
• Minimum Depth: 0.5 m (1.6)
• NMEA 2000 LEN: 2
• Pulses: 20,000 p/nm* (5.6 Hz per knot)*p/nm = pulses per nautical mile
• Retrofits: Fits most Airmar 2 housings
• Speed Range: Up to 45 knots
• Temperature Accuracy: 0.5C (1.8F)
• Tilted Element: No
• Usable Shaft Length: 121 mm (4.75)
• Voltage: 9 to 16 VDC
• Water Temperature: -10 to 40C (14 to 104F)

The Airmar DST820 Bronze Thru Hull sensor combines advanced technology with ease of installation to deliver precise speed-through-water, depth, and water temperature readings for sailing, racing, and yachting applications. Featuring a high-performance Gen2 paddlewheel, this sensor provides accurate data from as low as 0.3 knots up to 45 knots, making it ideal for both casual cruising and competitive racing. Its compact, low-profile bronze housing ensures a reliable fit in a variety of hull materials, including fiberglass and metal, with a 51 mm (2-inch) mounting hole for straightforward installation.

Built with the latest security standards, the DST820 is fully compliant with UK PSTI security protocols, ensuring that your connection to a mobile device is protected via QR-code setup and one-time security passwords. The sensor's Bluetooth BLE capability allows wireless calibration and configuration through Airmars CAST app, simplifying setup and ongoing adjustments. Users can perform basic or advanced heel-compensated speed calibrations, manually entering multiple speed and heel angle data points to enhance measurement accuracy across different sailing conditions.

Beyond speed, the DST820 provides depth measurements from 0.5 meters (1.6 feet) to 100 meters (328 feet), ensuring reliable depth data to prevent grounding. It also delivers water temperature readings with a precision of 0.5°C (0.9°F), supporting a broad temperature range from -10°C to 40°C (14°F to 104°F). The integrated attitude sensor supplies heel and trim data, enabling heel-compensated speed calibration for more precise navigational and performance analysis. With its 5.7 Hz (five updates per second) speed output, the DST820 ensures smooth and real-time data reporting.

Designed for versatility, the DST820 supports NMEA 2000 communication protocol and includes a 6-meter NMEA 2000 cable for flexible installation. Its rugged bronze housing and certification for CE standards make it suitable for a variety of marine environments, offering durable performance for cruising, racing, fishing, and leisure yachting. The sensor’s innovative features, combined with easy wireless calibration and security, make it a comprehensive solution for any vessel requiring accurate speed, depth, and temperature data in a compact, reliable package.

Features:

• Fully compliant with UK PSTI security standards for secure wireless connections

• High-performance Gen2 paddlewheel provides accurate speed-through-water measurements from 0.3 knots up to 45 knots

• 5.7 Hz speed output ensures smooth, real-time data reporting for fast decision-making

• Integrated attitude sensor supplies heel and trim data for advanced, heel-compensated speed calibration

• Bluetooth BLE capability allows wireless calibration and setup via Airmar's CAST app

• Supports depth measurement from 0.5 meters to 100 meters, preventing groundings

• Provides water temperature readings with 0.5°C (0.9°F) accuracy across a broad temperature range

• Compact bronze housing with a 51 mm (2-inch) mounting hole for easy installation

• NMEA 2000 protocol support with a 6-meter cable, suitable for various marine configurations

• Designed for durability and reliability in demanding marine environments, certified CE