Auxiliary marine engine — Yanmar
Eurosens Delta CAN installed on a Yanmar marine diesel without changing the original supply/return fuel-circulation scheme.
Eurosens Delta CAN · CAN
Marine Fuel & Vessel Monitoring
Fuel & Vessel Monitoringfor Boats and Ships
Track the vessel, measure actual fuel consumption of every engine and generator, monitor fuel and service tanks, and integrate the data with NMEA 2000 or a remote telematics platform.
- 10+ years on vessels
- Main + auxiliary engines
- Fuel + water tanks
- NMEA 2000 option
- Cellular + satellite telemetry
- Bunkering control option
Main engine
→2× Direct
Aux engine / genset
→Delta
Fuel tanks
→Dominator
Water / wastewater
→MWS 2
NMEA 2000 / CAN
→Remote tracker
Cellular / satellite
Why Vessel Owners Reach Out
The Problems We're Usually Asked to Solve
01
No precise fuel consumption control
Tank-level readings alone don't show actual per-engine consumption.
02
Hidden fuel losses
Theft and unrecorded draining are easy to miss without in-line flow data.
03
Inefficient operation
No visibility into cruising-speed choices or early signs of injector / filter wear.
04
No monitoring
No remote view of engine hours, position or fuel events once the vessel is underway.
What the System Monitors
One Vessel. One Monitoring Architecture.
| Layer | What is monitored | Typical data |
|---|---|---|
| Navigation | Vessel movement | Location, route, speed, activity / operating mode |
| Bunkering / fuel receiving | Fuel transferred onboard | Total received volume, instantaneous flow, start/stop time, duration |
| Fuel consumers | Main engines, auxiliary engines, gensets, boilers | Instant flow, total consumption, runtime / operating data |
| Fuel inventory | Fuel tanks | Level and calibrated volume |
| Service tanks | Fresh water / wastewater | Level / volume, high-level condition |
| Onboard network | NMEA 2000 / CAN equipment | Fuel data available to compatible onboard equipment |
| Remote telemetry | GSM / satellite tracker | Data transfer to monitoring platform / control center |
Sample Voyage Report — Vessel Project 123
| Consumer | Engine hours | Fuel, L | L / engine-hour |
|---|---|---|---|
| Main engine 1 | 3.7 | 58.2 | 15.9 |
| Main engine 2 | 3.6 | 66.0 | 18.2 |
| Genset 1 | 19.1 | 134.2 | 7.0 |
| Genset 2 | 0.0 | 0.0 | 0.0 |
| Boiler | 2.0 | 6.0 | 3.0 |
| Voyage total | 28.4 | 264.3 | — |
Movement 02:38, stops 21:21, distance 12.85 km, average speed 8.26 km/h — one real 24-hour voyage report, reduced to consumer-level fuel and runtime figures.
Interactive Vessel Architecture
Product Names Are the Result of the Architecture
Main engine
2 × Eurosens Direct high-flow meters
Main Engines
High-Flow Measurement for Main Propulsion Engines
Supply flow−Return flow=Actual main-engine fuel consumption
For high-flow main engines, the typical marine configuration is a pair of high-capacity Eurosens Direct meters — one on the fuel supply line and one on the return line.
| Model | Flow range | Role |
|---|---|---|
| Direct 1500 | 30–1,500 L/h | High-flow main engine / large diesel consumer |
| Direct 3000 | 60–3,000 L/h | Higher-flow main engine |
| Direct 5000 | 250–5,000 L/h | Very high-flow main engine / industrial marine diesel |
±1% maximum measurement error; 10–50 V supply; −40…+85 °C; IP67; RS485 / MODBUS / CAN and NMEA 2000 option; threaded and flange connection options. Final model selected against actual supply and return flows. Ex-rated (intrinsically safe) versions available on request for hazardous-zone installation.
Auxiliary Engines, Gensets & Boilers
Differential Measurement Without Rebuilding the Fuel Circuit
Key benefit
Installed in the existing supply and return lines without changing the original fuel-supply scheme.
Range
10–500 L/h
Accuracy
±1%
Temperature
−40…+85 °C
Warranty
2 years
RS485 / MODBUS / CAN SAE J1939 interfaces, temperature compensation in both measuring channels. Where air / gas bubbles are present in the return line, an optional Eurosens Deaerator is installed before the return chamber. Ex-rated (intrinsically safe) versions available on request.
Positioned for auxiliary / medium-flow consumers and selected propulsion engines where its flow range is appropriate — not the universal choice for every marine engine.
Discuss My Auxiliary EngineFuel Tank Inventory
Know How Much Fuel Remains in Every Tank
Flow meters answer "how much was consumed". Dominator answers "how much fuel is currently in the tank" — complementary, not competing, measurement methods.
- · Capacitive fuel level sensor, modular sensor / electrode design
- · Tank calibration table converts level to volume
- · Universal LLS / MODBUS / CAN J1939 protocols
- · ±1%; 10–50 V; −40…+85 °C; IP67
- · RS232/RS485, CAN and analog/frequency versions available
- · Ex-rated (intrinsically safe) versions available on request
| Fuel flow meter | Fuel level sensor |
|---|---|
| Measures fuel passing through the engine fuel line | Measures current fuel level / volume in the tank |
| Consumption measurement is not based on tank geometry | Provides current onboard fuel inventory |
| Not dependent on ship rolling | Shows refilling / draining and remaining stock |
| Best for actual consumption by consumer | Best for tank balance and inventory |
Consumption + Inventory = A Complete Fuel Picture
Water & Wastewater Tanks
Non-Contact Level Monitoring for Service Tanks
- · Contactless distance / liquid-surface measurement
- · Measuring range 100–10,000 mm
- · 10–50 V; −40…+85 °C; IP67
- · RS485 output, LLS and MODBUS RTU protocols
- · Ex-rated (intrinsically safe) versions available on request
Can measure through plastic walls transparent to electromagnetic waves, enabling selected plastic-tank installations without drilling — engineering confirmation required for the exact tank material and geometry.
Discuss My Service TanksOptional Bunkering Control
Measure Every Bunkering Operation
Bunker source / shore or barge→Transfer hose→Bulk meter→Vessel fuel tanks
A bulk fuel meter installed in the vessel bunker receiving line measures the fuel transferred onboard during bunkering — visible in the same monitoring environment as engine consumption and tank inventory.
Total fuel received, L / m³
Instantaneous transfer flow, L/min
Bunkering start / stop time
Bunkering duration
Presented as an operational bunkering-control instrument. "Custody transfer", "fiscal meter" or billing-accuracy claims require confirmation for the exact model and target market. Exact bulk-meter model, flow range, connection and certification are project-specific.
Ask About Bunkering ControlNMEA 2000 Integration
Fuel Monitoring That Works with Your NMEA 2000 Equipment
Eurosens fuel-consumption meters can be supplied / configured with an NMEA 2000 interface option, allowing fuel-consumption data to work together with compatible NMEA 2000 onboard equipment and the vessel's standard marine CAN network.
NMEA 2000 OPTIONWORKS WITH NMEA 2000 EQUIPMENTUSE THE EXISTING MARINE CAN NETWORK
| NMEA 2000 drop connection | Example role |
|---|---|
| Eurosens fuel meter | Fuel flow / consumption data |
| Marine multifunction display | Onboard visualization |
| Chartplotter / instrument display | Display of compatible vessel data |
| NMEA 2000 gateway | Network / telemetry integration |
| Other NMEA 2000 equipment | Shared onboard marine network |
NMEA 2000 is an interface option for supported fuel-meter configurations, not a native feature of every Eurosens product. On the NMEA 2000 output, the bus terminator, RS485 pull-up resistor and the engine instance number are all configurable per meter, so multiple Eurosens devices can share one backbone without address conflicts.
Tell Us Your Onboard EquipmentKit & Service
Everything for a Fast, Reliable Installation
A project kit is built around the selected Direct / Delta meter(s) plus the accessories the installation actually needs.
Eurosens DisplayLocal readout of flow and tank level for one or several engines.
NMEA 2000 T-ConnectorPlug-and-play drop connection into the vessel's NMEA 2000 backbone.
Eurosens DeaeratorRemoves air / gas from the return line ahead of a Delta return chamber.Destination CANService adapter for configuring and diagnosing Eurosens fuel meters.Eurosens T-CableWires multiple Eurosens sensors onto a shared data bus.Mounting KitFixings to mount the meter on the engine and seal the connection points.Remote Monitoring
From Engine Room to Shore
Onboard
Eurosens sensors / flow meters → CAN / RS485 / NMEA 2000 → onboard equipment.
Remote
Eurosens sensors / flow meters → telematics gateway / GPS tracker → GSM or satellite → monitoring platform / dispatch center.
Example route and fuel-event view from a VMS / online monitoring platform.
Real Installations
Marine Use Cases
Optional Deaerator
Removes gas impurities / bubbles from the return fuel line before the Delta return chamber — an optional engineering accessory, not a mandatory component for every installation.
Additional marine case photography (river cargo vessel, tug / workboat, fishing vessel, passenger ferry, bunkering operation) is being added to this portfolio as project photography is approved.
Discuss My VesselIntegration
Designed for Marine and Telematics Ecosystems
NMEA 2000CAN SAE J1939RS485MODBUS RTUPulse
Marine Trust
Measurement Equipment for Professional Marine Installations
10+ years on the water, across:
Cargo & passenger vesselsTugs & workboatsFishing vesselsDredgersMotor yachtsBoats
River Register
Measuring instrument approval — Belarus
Measuring instrument approval — Kazakhstan
Measuring instrument approval — Russia
UNECE / EMC documentation (where applicable)
Eurosens fuel flow meters used in this solution are presented as River Register certified and included in measuring-instrument registers in Belarus, Kazakhstan and Russia. Only certificates that apply to the specific product and current modification offered for the target market are shown — not every sensor in the complete system carries the same marine approval.
FAQ
Questions from Vessel Operators and Integrators
Flow meters measure actual fuel consumed by individual engines and other consumers; level sensors show current tank inventory. Together they provide consumption plus stock balance.
Result for Your Business
What Changes Once the System Is Running
Reduced fuel loss
Theft and unrecorded draining become visible, not assumed.
Cost transparency
Per-engine, per-voyage figures replace fuel-bill guesswork.
Simple installation
Installed in the existing fuel circuit — no rebuild.
One monitoring system
Engines, tanks and position in a single view.
Fast payback
Savings from the first voyages typically offset the install cost.
Final step
Tell Us About Your Vessel — We'll Configure the Monitoring System
Engines, tanks and onboard network — enough for Eurosens engineering to preselect meters, level sensors and interfaces.