Fuel monitoring that catches siphoning, not just consumption
Gradual decline is burn. A cliff at two in the morning with the engine off is theft — and the difference is exactly what the system watches for.
A capacitive probe fitted inside the tank reports the fuel level continuously, producing a curve rather than a monthly average. Normal consumption shows as a gentle slope while the engine runs; siphoning shows as a sudden drop while the vehicle is stationary. Each theft alert carries the litres lost, the timestamp and the map location, and refills are logged so you can check the tank against the pump receipt.
Why monthly averages hide theft
Most fleets measure fuel by comparing pump receipts against kilometres driven. That method cannot see theft, because a driver who siphons forty litres and then drives economically for a week produces the same monthly average as one who does neither. Averages hide events; only the shape of the tank level over time reveals them.
How the sensor works
A capacitive probe is cut to the depth of your tank and calibrated on site by filling in measured increments, so readings map to real volume rather than a generic curve. It resolves changes of a few litres — far finer than a factory float sender, and without the noise that makes float data useless for this purpose.
The device transmits the level with every position report, which is what produces a continuous curve rather than occasional samples.
What a useful alert contains
"Fuel drop detected" is not actionable. Every alert we raise carries four things, because you need all four to have a conversation that holds up:
- Volume — how many litres left the tank.
- Timestamp — to the minute, with the ignition state at that moment.
- Location — a map pin, so a roadside stop reads differently from a filling station.
- Driver — who was assigned, ideally confirmed by RFID rather than a roster.
Beyond theft: the reports that save money quietly
Along with current level and mileage, the module produces accurate refill details and consumption analysis. Read properly, those reports identify better drivers, better routes and even better refuel points — each of which adds up in cost terms without anyone being accused of anything.
- Litres per 100 km by vehicle, driver and route.
- Idling burn isolated, so you can price the waste separately.
- Refill reconciliation — tank gain against receipt volume.
- Generator fuel monitoring, usually the single biggest leak on a construction site.
Cost and payback
A capacitive probe runs PKR 9,000–13,000 per tank including calibration. On a diesel vehicle consuming a thousand or more litres a month, a single prevented siphoning incident typically covers it several times over. Our guide on detecting and stopping fuel theft covers how to introduce it without wrecking morale in the yard — which matters more than the hardware.
Fuel monitoring FAQs
Direct answers to what customers ask before they commit.
Ask something elseA capacitive probe inside the tank reports the fuel level continuously. Consumption produces a gentle decline while the engine runs; theft produces a sudden vertical drop while the vehicle is stationary with the ignition off. The system flags that pattern with the litres, time and location.
A capacitive fuel probe costs roughly PKR 9,000 to 13,000 per tank including on-site calibration. Vehicles with twin tanks need one probe per tank.
A correctly calibrated capacitive probe resolves changes of a few litres. Calibration is done by filling the tank in measured increments so readings map to real volume rather than an assumed tank shape.
Yes. Generators are one of the most common applications, particularly on construction sites where fuel loss is high and nobody is watching the tank overnight.
We recommend telling them. A meaningful share of siphoning simply stops once drivers know the tank is measured, which is the cheapest possible outcome and avoids the system landing as an accusation.