Raymarine ST900 Speed/Temp Low Profile Bronze Thru-Hull with 13.7m Cable
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Raymarine ST900 Speed/Temp Low Profile Bronze Thru-Hull with 13.7m Cable Product Description
Upgrade your vessel's navigation with the Raymarine ST900 speed and temperature sensor, a thru-hull powerhouse designed for precision in demanding marine environments. This low-profile bronze thru-hull transducer delivers unmatched responsiveness, capturing boat speeds from a whisper-quiet 0.3 knots up to a blistering 45 knots. Paired with fast-response temperature readings, it equips sailors and powerboaters with critical data for optimal performance, whether you're racing offshore or tracking fish-holding thermoclines.
Exceptional Gen2 Paddlewheel Technology
At the heart of the ST900 lies Raymarine's innovative Gen2 paddlewheel, engineered for superior startup sensitivity and linear accuracy across the full speed spectrum. Unlike traditional sensors that lag at low speeds or falter at high velocities, this next-gen design ensures smooth, reliable data from idle to full throttle. The result? Confident decision-making on speed-over-ground adjustments, fuel efficiency calculations, and tactical racing strategies.
Sleek Low-Profile Design Minimizes Drag
Crafted with a bronze housing for corrosion resistance in saltwater, the ST900 extends just 5 mm (3/16") beyond the hull—nearly flush for reduced hydrodynamic drag. Its retractable insert features a built-in valve that seals the hull during maintenance, keeping your bilge dry and downtime minimal. Perfect for sleek racing hulls or performance cruisers where every bit of speed counts.
Versatile Analog Output and Easy Retrofits
With analog output, integration into legacy Raymarine displays and multifunction systems is seamless. It retrofits effortlessly into popular Airmar P120 and B120 housings, extending the life of your existing setup without hull modifications. The 13.7m cable provides ample reach for clean routing to your helm station.
Key Benefits for Boaters
- Industry-leading low-speed accuracy for anchoring, docking, and light-air sailing
- Fast temperature response to detect water column changes for fishing or engine monitoring
- Bronze construction withstands harsh marine conditions year after year
- Valve-equipped housing simplifies paddlewheel cleaning and servicing
- Broad speed range suits dinghies to large yachts
Technical Specifications
| Specification | Details |
|---|---|
| Cable Length | 13.7 m |
| Functions | Speed, Temperature |
| Hole Size | 51 mm (2") |
| Housing Material | Bronze |
| Mounting Style | Low-Profile Thru-Hull |
| Output Protocol | Analog |
| Retractable | Yes, with Valve |
| Retrofit Compatibility | Airmar P120, B120 Housings |
| Speed Range | 0.3 to 45 knots (0.34 to 52 MPH / 0.55 to 83 KPH) |
| Temperature Accuracy | ±0.5°C (±1.8°F) |
| Temperature Range | -10°C to 40°C (14°F to 104°F) |
Installation Tips for Peak Performance
Position the thru-hull 1/4 to 1/3 of the waterline length forward of the rudder post, in undisturbed water flow. Fair the housing to match hull contours for zero turbulence. Always bed with marine sealant, torque to spec, and calibrate post-install via your Raymarine display for true boat speed.
Frequently Asked Questions
What speed range does the Raymarine ST900 cover?
The ST900 provides accurate speed readings from 0.3 knots to 45 knots (0.34 to 52 MPH or 0.55 to 83 KPH), ideal for a wide range of boating speeds.
Is the ST900 suitable for saltwater use?
Yes, its bronze housing offers excellent corrosion resistance, making it perfect for saltwater environments.
What is the required hull hole size for installation?
A 51 mm (2-inch) hole is required for thru-hull mounting.
Does this sensor retract for maintenance?
Yes, it features a retractable insert with a valve to prevent water ingress during paddlewheel servicing.
Can the ST900 retrofit older Airmar housings?
It retrofits seamlessly into Airmar P120 and B120 housings, saving time and avoiding new hull penetrations.
What is the temperature measurement capability?
Fast-response temperature sensing with ±0.5°C accuracy over a -10°C to 40°C range.
How long is the cable included?
The ST900 comes with a 13.7-meter cable for flexible installation routing.
Equip your boat with the ST900 and experience the difference in data-driven boating—reliable, responsive, and ready for adventure.
Raymarine ST900 Speed and Temperature Low Profile Bronze Housing
Model: E70686- Speed and fast-response water-temperature
- Best-in-class speed range from 0.3 to 45 knots (.34 to 52 MPH/.55 to 83 KPH)
- Analog output
- Retractable insert in a low-profile plastic housing with a water valve
- ST900—Retrofits into Airmar P120 and B120 housings
Speed performance has been taken to the next level with the introduction of the ST900 Speed/Temperature sensor. Featuring the new Gen2 Paddlewheel, the ST900 out-performs all other paddlewheel sensors for responsive startup and linearity. The Gen2 Paddlewheel begins delivering accurate speed reporting as low as 0.3 knots and maintains smooth speed output through 45 knots.
These low-profile housings are nearly flush and minimize drag with only 5 mm (3/16"") extending outside 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.
Airmar’s new, next-generation paddlewheel design delivers industry-leading performance for start-up responsiveness and linearity throughout the speed range. Gen2 paddlewheel maintains the top speed performance Airmar is known for and adds start-up speed performance that beats all other available paddlewheels. The Gen2 paddlewheel is the most sensitive and accurate paddlewheel available for sailing and power boats.
Specifications| Cable-Length | 13.7m |
| Functions | Speed, Temperature |
| Hole Size | 51 mm (2"") |
| Housing | Bronze |
| Mounting Style | Low Profile Thru-Hull |
| Protocol Output | Analog |
| Retractable housing | Yes |
| Retrofits | AIRMAR P120, B120 housings |
| Speed Range | 0.3 to 45 knots (.34 to 52 MPH/.55 to 83 KPH) |
| Temperature Accuracy | ±0.5°C (±1.8°F) |
| Water Temperature | -10° to 40°C (14° to 104°F) |
What's in the Box:
- ST900 with 13.7m Cable
- Bronze Housing and nut
Save $48 when you buy the Raymarine ST900 Speed/Temp Low Profile Bronze Thru-Hull with 13.7m Cable for only $281 from NVN Marine! Same day shipping before 3pm.
Raymarine ST900 Speed/Temp Low Profile Bronze Thru-Hull with 13.7m Cable Technical Specifications
| Type: | |
|---|---|
| Vendor: |
Raymarine |
| Weight: |
2.5 lb |
Raymarine ST900 Speed/Temp Low Profile Bronze Thru-Hull with 13.7m Cable User Reviews
Raymarine ST900 Speed/Temp Low Profile Bronze Thru-Hull with 13.7m Cable Shipping & Return
| Shipping Weight: |
2.5 lb |
|---|---|
| Box Sizes: |
1.00 (h) x 1.00 (w) x 1.00 (l) |
| Cubic Feet: |
1.0 |
| Returnable: |
Yes |
| USPS First Class: |
Yes |
| P65: |
Yes |
For detailed shipping policy please check our Shipping Policy and you can find our Return and Refund Policy here.