Airmar
ST850
The ST850 is a low-profile, retractable, thru-hull sensor that computes accurate speed and temperature data and sends it to any NMEA 0183 or NMEA 2000® display or network. These low-profile units are nearly flush and minimize drag with only 5 mm (3/16") 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.
Airmar's Smart™ Sensors have embedded microelectronics. The signals from the speed ands are processed right inside the housing itself. All that is needed to receive speed and temperature data is a single cable into a compatible network or display. Available as an analog sensor or a digital Smart Sensor that can output in NMEA 0183 or NMEA 2000 standard.
Features
Speed and temperature
Speed Range: 2 to 45 knots (2 to 52 MPH)
NMEA 2000 or analog output options
Retractable insert in a low-profile housing with a water valve
Available in a plastic (P17) or bronze (B17) housing with water valve
Retrofits into B617V, P617V, SS617V, P217, P314or ST650 housing
NMEA 2000 certified or analog cable
Specifications
Weight:
Plastic—0.7 kg (1.4 lb.)
Bronze—1.3 kg (2.8 lb.)
Hull Material:
Plastic housing—Fiberglass or metal hull
Bronze housing—Fiberglass or wood hull
Speed Range: 2 to 45 knots (2 to 52 MPH)
Acoustic Window: Urethane
Hole Diameter: 51 mm or 2"
Data Update Rate: 1 per second
Pressure Rating: 3 m (10')
Pulse Rate: 17,000 p/nm* (4.8 Hz per knot)—*p/nm = pulses per nautical mile
Supply Voltage: 9 to 16 VDC
Supply Current: <200 mA
Standard Cable Length:
NMEA 2000—6 m (20')
Analog—9 m (30')
Temperature Sensor Accuracy: ±0.5°C (±1.8°F)
Temperature Sensor Range: -10° to 40°C (14° to 104°F)
NMEA 2000 Load Equivalency Number (LEN): 2
CE Regulation: Complies to IERC60945
Includes: Blanking plug
Speed and temperature
Speed Range: 2 to 45 knots (2 to 52 MPH)
NMEA 2000 or analog output options
Retractable insert in a low-profile housing with a water valve
Available in a plastic (P17) or bronze (B17) housing with water valve
Retrofits into B617V, P617V, SS617V, P217, P314or ST650 housing
NMEA 2000 certified or analog cable
Specifications
Weight:
Plastic—0.7 kg (1.4 lb.)
Bronze—1.3 kg (2.8 lb.)
Hull Material:
Plastic housing—Fiberglass or metal hull
Bronze housing—Fiberglass or wood hull
Speed Range: 2 to 45 knots (2 to 52 MPH)
Acoustic Window: Urethane
Hole Diameter: 51 mm or 2"
Data Update Rate: 1 per second
Pressure Rating: 3 m (10')
Pulse Rate: 17,000 p/nm* (4.8 Hz per knot)—*p/nm = pulses per nautical mile
Supply Voltage: 9 to 16 VDC
Supply Current: <200 mA
Standard Cable Length:
NMEA 2000—6 m (20')
Analog—9 m (30')
Temperature Sensor Accuracy: ±0.5°C (±1.8°F)
Temperature Sensor Range: -10° to 40°C (14° to 104°F)
NMEA 2000 Load Equivalency Number (LEN): 2
CE Regulation: Complies to IERC60945
Includes: Blanking plug