How is fuel siphoning detected?
· Kelvin Oyugi, Technology & Telematics Expert · 2 min read
By measuring the fuel level in the tank continuously rather than at intervals, so that fuel leaving the tank appears as an event with a time and a place, rather than as an unexplained difference between two readings.
Fuel loss is difficult to argue about after the fact. A tank that held less than it should at the end of a shift can be explained by consumption, by a heavier load, by traffic, by a longer route, or by siphoning, and a fortnightly reconciliation cannot separate them. That ambiguity is where the cost hides.
A fuel monitoring system removes the ambiguity by changing the sampling. An IoT-based sensor recognises the fuel level in the tank automatically, and by measuring fuel volume precisely it detects tank fill-up and fuel draining volumes continuously, rather than at intervals — which is what makes a siphoning event visible as an event rather than as an unexplained difference between two readings.
Once a drop has a timestamp and a position attached, it stops being a dispute and becomes a fact. A fall in level at a fuel station during a recorded stop is a fill. The same fall on a verge at 23:40, with the engine off, is not, and it can be raised with the person who was driving while they still remember the night in question.
The same measurement answers a quieter question. Not all fuel loss is theft — some is a leak, some is a sensor that needs attention, and some is a route that costs more than anyone realised. A system that reports what actually happened lets you tell those apart instead of assuming the worst about a driver.
Nebsam does not publish a figure for how much fuel a monitoring system saves. Savings depend on the fleet, the routes and what is being lost today, and a percentage borrowed from a vendor brochure is not a number anyone should plan against.
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