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AirmarModel ST850SS-A -Thru-Hull Analog Speed and Temperature Sensor

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The ST850/800 is an analog, retractable speed and temperature sensor. The sensor fits inside a low profile, stainless steel 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.

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  • Speed and temperature
  • Speed Range: 2 to 45 knots (2 to 52 MPH)
  • Analog output
  • Retractable insert in a low-profile stainless steel housing with a water valve
  • Also available in a plastic or bronze housing with water valve
  • Retrofits into B617V, P617V, SS617V, P217, P314or ST650 housing
  • Functions: Speed, Temperature
  • Mounting Style: Low Profile Thru-Hull
  • Power Rating: N/A
  • Protocol Output: Analog
  • Housing: Stainless Steel
  • Hull Material: All hull materials
  • 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 B617V, P617V, SS617V, P217, P314 or ST650 housing
  • Speed Range: 2 to 45 knots (2 to 52 MPH)
  • Temperature Accuracy: ±0.5°C (±1.8°F)
  • Tilted Element: No
  • Usable Shaft Length: 55 mm (2.15")
  • Voltage: 9 to 16 VDC
  • Water Temperature: -10° to 40°C (14° to 104°F)
  • Weight: 1.3 kg (2.8 lb.)