The Airmar UDST800P-N2 combines ultrasonic depth, speed, and water temperature measurement into a single thru-hull housing with zero moving parts. Designed for power and sailboats of all sizes, it eliminates paddlewheel maintenance while delivering high-precision data at speeds from a crawl to 50 knots. Advanced filtering and adaptive sampling keep accuracy consistent across varying boat speeds, water depths, and water clarity conditions — all over NMEA 2000.

Specifications:

• Ultrasonic depth, speed, and temperature in one housing — no moving parts
• Data update rate: up to 10 times per second
• Correlation speed sensor transmitting frequency: 4.5 MHz
• Correlation pulse repetition frequency: 0.5 kHz to 12 kHz (varies with speed)
• Speed range: 0.1 to 50 knots (0.1 MPH to 57 MPH)
• Available output: NMEA 2000®
• Water temperature range: -4°C to 40°C (32°F to 104°F)
• Depth frequency: 235 kHz
• Depth range: minimum 0.6 m (2'), maximum 100 m (328')
• Supply voltage (NMEA 2000®): 9 VDC to 16 VDC
• Supply current: 80 mA – 200 mA; average 125 mA at 12 VDC
• Thru-hull housing material: plastic (bronze or stainless steel optional)
• Thru-hull housing diameter: 51 mm (2")
• CE compliant: Yes
• Retrofits into Airmar P617V housing

Resources:

• Product Video

This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.