Imagine gliding through calm waters during an early morning trolling session, knowing exactly how fast you're moving without relying on fluctuating GPS signals. The transom mount paddlewheel speed sensor delivers precise speed-through-water readings, especially at those slow speeds where GPS often falls short. This rugged sensor mounts cleanly on your boat's transom, spinning a paddlewheel in the water flow to provide real-time data that enhances your boating experience.
Whether you're fine-tuning your lure presentation for trophy fish or optimizing routes to stretch your fuel further, this sensor integrates seamlessly into your marine network. Pair it with a compatible fuel flow sensor, and you'll unlock insights into your vessel's efficiency, helping you make smarter decisions on longer trips.
Key Advantages for Serious Boaters and Anglers
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Superior Low-Speed Accuracy: Perfect for trolling at 1-5 knots, where GPS can be off by 20% or more due to currents or satellite issues. Get readings you can trust for precise boat control.
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Network-Wide Sharing: Broadcasts speed data across NMEA 2000 displays, so every screen on board shows consistent info—no more conflicting readings.
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Fuel Efficiency Insights: When networked with a fuel flow sensor, calculate real-time MPG or GPH, spotting patterns like hull fouling or prop inefficiencies early.
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Built to Last: Tough construction withstands constant water exposure, impacts from debris, and the rigors of saltwater or freshwater use.
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Simple Setup: Quick transom installation with included connectors means you're up and running in under an hour, no special tools required.
How the Paddlewheel Technology Delivers Reliable Data
The sensor's paddlewheel rotates as water rushes past, generating electrical pulses proportional to your speed. These pulses convert into digital data via the NMEA 2000 backbone, feeding accurate knots or MPH to your chartplotter, fishfinder, or multifunction display. Unlike sonar-based alternatives, it shares data freely across the network without tying up sonar channels.
A 10-foot cable gives you flexibility in routing, and the Micro-C connector ensures a secure, waterproof link. It's designed as a drop-in replacement for older models, maintaining compatibility with modern Lowrance ecosystems.
Effortless Installation for Any Skill Level
Mount the sensor about 1/3 from the transom's bottom edge, ensuring the paddlewheel sits just below the hull for optimal water flow. Drill minimal holes, secure with screws, and connect the T-connector to your NMEA 2000 drop cable. Calibrate once on the water by matching it to a known GPS speed in open water, and you're set.
Pro tip: Angle it slightly downward (about 20 degrees) to keep the wheel submerged at planing speeds. Regular checks prevent marine growth from skewing readings.
Keep It Performing Like New
- Clean the paddlewheel monthly with a soft brush and freshwater to remove algae or barnacles.
- Inspect the O-ring seals annually for wear and lubricate with marine grease.
- Winterize by removing and storing dry if trailering in cold climates.
- Troubleshoot no-readings by spinning the wheel manually—smooth rotation means good health.
These habits ensure years of dependable service, maximizing your investment in precise boating data.
Frequently Asked Questions
The Speed Sensor is a transom-mounted paddlewheel that uses the flow of water beneath the boat to measure your speed. Pair the Speed Sensor with a Fuel Flow Sensor to monitor your vessel's fuel economy.
Transom-mount paddle wheel 3.1 m (10ft) cable with Micro-C connector.
The rail is installed with the speed sensor. The rail is installed with a 3.1 M 10-foot cable with a micro-c connector. The ep-70 output speed is replaced by a horizontal paddle wheel...
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