Sensor selection
How to choose the right FS-40 sensor range
Establish the flow in the fuel lines before choosing a size. Engine power, net consumption or the code on an old flow meter cannot confirm the correct selection.
Read guideFlowtrecs knowledge base
Select, install and troubleshoot your fuel-measurement system
Clear answers for boat owners, installers and service teams — from diesel differential measurement and FS-40 selection to installation, diagnostics and Bluetooth.
Fuel economy in km/l helps compare boat settings, reduce fuel use and lower trip costs.
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Flowtrecs / 03
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FS-40 installation
How to install the Flowtrecs FS-40 correctly
Horizontal mounting, correct flow direction, the right fuel hose and careful bleeding all affect system integrity and stable readings. Follow this practical checklist before the first start.
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Troubleshooting
Flowtrecs calibration and troubleshooting, step by step
The sensor is factory calibrated. If a reading is missing, unstable or consistently differs from verified consumption, inspect the installation first and change only one variable at a time.
Read guideDiesel fuel measurement
Diesel fuel measurement: from fuel layout to the right kit
A correctly specified system can show current and accumulated fuel use on a diesel engine. Start by confirming the real feed-and-return layout, then measure both streams and select sensors for the flow in each line.
Read guideDiesel and pulsation
Diesel reading fluctuates or over-reads? Check the system step by step
In a return-line diesel, the result is the difference between two large flows. Air, an unmeasured branch, return temperature, reverse flow, pulsation or an incorrect range can cause fluctuation, over-reading or a negative value. This procedure locates the cause before calibration.
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App and Bluetooth
Flowtrecs App and Bluetooth: first-time setup
Prepare a compatible Android phone or tablet and connect it to the Flowtrecs interface over Bluetooth.
Read guideSensor selection
How many fuel-flow sensors does your boat need?
Sensor count depends mainly on the number of engines and whether fuel returns to the tank. Use the quick matrix first, then check the exceptions and flow-range guidance below.
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Product comparison
Inox, Mini, Wave, Android BT, C7 Ultra or App — which should you choose?
All six families use flow sensors, but they differ in display, mounting, connection and channel capacity. Define the fuel system first, then choose how you want to see the data.
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How it works
How does Flowtrecs measure actual fuel consumption?
A sensor measures flow in one specific fuel line. In a no-return system that reading can represent consumption; with a return line, fuel returning to the tank must be subtracted.
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