Garmin ST850 Speed and Temperature Sensor

Plastic Housing, Garmin 8-Pin Y-Cable, P17

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.

Key Features

• Speed and temperature
• Speed Range: 2 to 45 knots (2 to 52 MPH)
• Analog output
• Retractable insert in a low-profile plastic housing with a water valve
• Also available in a Stainless steel or bronze housing with water valve
• Retrofits into B617V, P617V, SS617V, P217, P314or ST650 housing

Identifying your Transducer

Every Airmar transducer has a label attached to its cable, located near the top of the transducer or where the cable plugs into the back of the instrument or display. This label contains information that is helpful in identifying the transducer and locating the correct service parts for it. For most Airmar products this label will show:

• the model name
• the manufacturing date
• certain performance characteristics (i.e. the transducer's frequency)
• the Airmar part number (PN)
• a Customer Part #

In all cases it is the Airmar Part Number (PN) that is the most important number to have available when ordering parts or contacting us about the transducer.

Before calling or emailing us about parts, please make sure you have the Airmar part number from the label on the transducer cable.