Airmar UDST820 TriSonic Plastic Thru-Hull Transducer - N2K [UDST820P-N2]
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Airmar UDST820 TriSonic Plastic Thru-Hull Transducer - N2K [UDST820P-N2]
Product details
Description and Specifications
UDST820 TriSonic Plastic Thru-Hull Transducer - N2K
TriSonic Smart Sensor combines a depth sensor, ultrasonic speed sensor, water temperature, and heel and trim data into one sensor. It delivers unmatched reliability and accuracy without the need for paddlewheel maintenance. Its ultrasonic speed solution features no moving parts, eliminating cleaning or wear concerns, making it a high-precision, low-maintenance option for power and sailboats of all sizes. The TriSonic Smart Sensor, along with the CAST™ app, simplifies the calibration of speed-through-water. The Airmar CAST™ App connects directly from iOS and Android™ Smart devices to Airmar’s Bluetooth® enabled TriSonic Smart™ sensors and makes configuration simple with intuitive menus and guided calibration. View data from the sensor in digital or graphical format, quickly turn on or off NMEA 2000® PGNs, configure offsets and more.
CAST App for Speed and Depth Calibration:
The CAST app provides a simple and consistent way of calibrating speed and depth. Simple offsets can be applied to compensate for the depth below keel or depth from surface. Calibrations and configuration changes are stored in the Airmar Smart Multisensor and delivered to the NMEA2000® network. CAST provides a consistent and reliable way to calibrate basic and heel-compensated speed-through-water with a step-by-step guided process. For advanced speed-through-water calibration, CAST allows you to manually enter custom speed data for up to four heel angles and up to ten speeds. Before CAST, this feature was only available on the market through expensive PC software.
Embrace Ultrasonic Smart technology and leave paddlewheel maintenance behind, brought to you by the innovators of the Smart™ Sensor.
TriSonic Smart Sensor Combines:
- Ultrasonic speed (no paddlewheel)
- Depth
- Water temperature
- Heel and trim data
Features:
- No paddlewheel or moving parts to maintain or replace.
- Provides NMEA 2000® output of calibrated data to every instrument and MFD on the network.
- Advanced speed filtering and sampling rates for enhanced accuracy at all speeds, with data updating up to 5 times per second.
- Patented Adaptive Signal Processing – adjusts to boat speed, water depth, and water clarity for consistent speed accuracy.
- Suitable for both saltwater and freshwater use.
- Easily retrofits into most existing AIRMAR 2" housings.
Connects wirelessly to Airmar’s CAST app, offering user-friendly benefits:
- Simplifies speed calibration through your mobile device.
- Offers basic and advanced speed calibration with the ability to manually enter speeds for multiple heel angles and up to 10 different speeds, a feature previously available only through costly PC software
Specifications:
- Bluetooth Capable: YES Bluetooth BLE
- Cable-Length: 6 m (20') NMEA 2000® cable, 6 m (20')
- Comm Method: NMEA 2000®
- Common Use: Cruising/Racing Sailboats, Leisure/Yachting
- Country of Origin: USA
- Data Rate: Up to 10 times per second
- Depth Range: Minimum Depth .6 m ( 2'), Maximum Depth 100 m (328')
- Display Connector: N2 Micro
- Frequency Band: 235 kHz
- Functions: Depth, Speed, Temperature, Attitude
- Hole Size: 51 mm (2")
- Hull Material: Fiberglass or metal
- Material: Plastic
- Max Depth: 0.6 m (2') to 100 m (330')
- Mounting Style: Low Profile Thru-Hull
- NMEA 2000 LEN: 6
- Power Rating: 100 W
- Power Supply Current: 80 mA - 200 mA, Average 125 mA @12VDC
- Retract Method: Manual
- Retractable housing: Yes
- Retrofits: Fits most Airmar 2" housings
- Speed Range: 0.1 to 35 knots (40 MPH)
- Temperature Accuracy: +0.5°C (+1.0°F)
- Tilted Element: No
- Usable Shaft Length: 57 mm (2.25")
- Voltage: 9 to 16 VDC
- Water Temperature: -4° to 40°C (24.8° to 104°F)
- Weight: 1.4 kg (3 lb.)
- Wireless Range: Up to 30' depending on mount location
Shipping, Warranty & Returns
Shipping: "In-stock items ordered by 4:00 PM EST ship the same day. High-value marine electronics are shipped insured and may require signature confirmation."
Warranty: "Salina Vita is an Authorized Dealer. Your purchase includes full manufacturer warranty support. Proof of purchase is retained for your records, and any warranty service is handled directly through the manufacturer."
Returns: "Eligible uninstalled merchandise in its original, factory-sealed packaging may be returned within 30 days of receipt. All returns require an RMA number and may be subject to a restocking fee of up to 15%. Electronics that have been installed or powered on are non-returnable."
Compatibility & Fitment
Marine electronics are highly vessel-specific. If you are unsure if this integrates with your current helm, please contact our concierge team for a fitment review prior to ordering.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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FAQs
Please read our FAQs page to find out more.
When will my order ship?
For in-stock items, orders placed by 4:00 PM EST are eligible to ship the same day. If any item in the order is not currently in stock, shipment timing will depend on availability.
What is your return window?
Eligible merchandise may be returned within 30 days from the date of receipt. All returns require a Return Merchandise Authorization (RMA) number before anything is sent back. For the smoothest experience, we ask customers to contact Salina Vita first so we can coordinate the request properly. Returned merchandise must be complete, in its original packaging, and in resalable condition. Items that arrive incomplete, improperly packed, or not suitable for resale may not qualify for return approval.
Are restocking fees possible?
Yes. Approved returns may be subject to a restocking fee of up to 15%. Non-stock items may not be returned. In addition, opened or unsealed DVDs, CDs, and cartography products are non-returnable unless defective. If the product falls into CWR’s excluded media categories—such as opened or unsealed cartography, DVDs, or CDs—it is not returnable unless defective.
If my unit needs warranty service, should I send it back to Salina Vita?
No. Units requiring service, whether under warranty or otherwise, should be returned directly to the appropriate manufacturer, not to Salina Vita. We are always happy to help guide you to the correct manufacturer support path. Absolutely. While the service destination is the manufacturer, we can help you identify the proper support channel and make the process feel more straightforward and well-managed. Units that require service themselves, however, should go directly to the manufacturer under CWR’s policy.
I still have more Questions, can we contact you?
At Salina Vita, we believe premium marine commerce should feel measured, transparent, and reassuring. If you have a question about a shipment, return eligibility, or manufacturer service, contact us before taking the next step and we will guide you with the discretion and clarity your vessel deserves.