The ST850/800 is an analog, retractable speed and temperature sensor. The sensor fits inside a low profile, plastic thru hull housing that is nearly flush to the hull, with only 5 mm (3/16”) extending outside of the hull. The housing has a valve assembly that helps to minimize water ingress in the bilge when the sensor is removed for routine maintenance of the paddlewheel.
Speed and fast-response water-temperature sensing
Speed range from 2 to 45 knots (2 to 52 MPH)
Analog output
Retractable insert in a low-profile Plastic housing with a water valve
Functions: Speed, Temperature
Mounting Style: Low Profile Thru-Hull
Power Rating: N/A
Protocol Output: Analog
Housing: Plastic
Hull Material: Fiberglass or metal
Hole Size: 51 mm (2")
Retractable housing: Yes
Cable-Length: 9 m (30’) Analog cable
Common Use: Cruising/Racing Sailboats, Leisure/Yachting, Fishing
Data Rate: 1X per second
Pulses: 17,000 p/nm* (4.8 Hz per knot)—*p/nm = pulses per nautical mile
Retrofits: Retrofits into AIRMAR P120, B120 housings
Speed Range: 2 to 45 knots (2 to 52 MPH)
Temperature Accuracy: ±0.5°C (±1.8°F)