Airmar ST850 NMEA 2000 Smart Speed & Temperature Sensor

The ST850 is a low-profile, retractable, thru-hull sensor that computes accurate speed and temperature data and sends it to any NMEA 2000® network. These low-profile units are nearly flush, minimizing drag with only 3/16" (5 mm) extending outside of the hull. The housing features a water valve which minimizes water ingress into the boat when the retractable insert is being replaced with the blanking plug.

Features:

• Speed and fast-response water-temperature sensing
• NMEA 2000 protocol
• Retractable insert in a low-profile housing with a water valve
• Retrofits into B617V, P617V, SS617V, P217, P314, or ST650 housing
• NMEA 2000 certified cable

Specifications:

• Material: Model dependent
• Cable length: 20' (6 m)
• Comm method: NMEA 2000®
• Data rate: 1 hz
• Display connector: N2 Micro
• Functions: Speed/temperature
• Hole size: 2" (51 mm)
• Mounting style: Low profile thru-hull
• Pulses: 17,000 p/nm (4.8 Hz per knot)
• Retractable housing: Yes
• Speed range: 2 to 45 knots (2 to 52 MPH)
• Temperature accuracy: ±1.8° F (±0.5° C)
• Tilted element: No
• Usable shaft length: 2.25" (57 mm)
• Voltage: 9 to 16V DC
• Water temperature: 14° to 104° F (-10° to 40° C)

Installation Instructions