"Where did the diesel go?"
Answered before the driver can explain it away.
Every fleet owner, driver and accounts team sees the same live fuel picture — from every fill-up to every unexplained drop. No more disputed diesel bills. No more guessing at the pump.
Diesel is your biggest running cost. It's also your least-tracked one.
Fuel routinely runs close to half of a diesel fleet's operating cost — and a logbook can't catch a siphoned tank, an inflated fill-up, or an engine idling for an hour at a dhaba. A fuel sensor wired to your GPS tracker can.
Fuel theft
Sudden level drops while the vehicle is parked or idle are flagged the moment they happen — with the exact location and time.
Inflated refuels
Every top-up is measured by the sensor itself, not the fuel slip — so a driver claiming a full tank can be checked in seconds.
Idle burn
Engine-on, wheels-off time is often the quietest leak in a fleet — reports show exactly which vehicles and drivers idle the most.
From tank to dashboard in three steps
Fit the sensor
A fuel level sensor is fitted inside the tank and wired to your GPS tracker — usually done in under 90 minutes by a certified technician at your yard.
Stream the data
The sensor reports fuel level to the cloud alongside GPS location, ignition status and speed — as often as every 30 seconds.
Get the alert
Theft alerts, refuel confirmations and consumption reports land in the Alphatech app and dashboard — no manual logbook required.
A complete GPS fuel monitoring system, not just a sensor
Real-time fuel level monitoring
See live tank levels for every vehicle in the fleet on one dashboard, not this morning's estimate.
Fuel theft & drain alerts
Instant notification the moment fuel drops while a vehicle is stationary, with GPS location and timestamp.
Refuel verification
Every top-up is logged by the sensor with quantity, time and place, so it can be checked against the fuel bill.
Idle fuel waste tracking
Flag vehicles burning diesel with the engine on and the wheels not turning, by driver and by route.
Consumption & mileage reports
Compare expected vs. actual mileage per vehicle, route and driver, exportable for your accounts team.
Geofenced fuel stops
Mark your approved fuel stations and get an alert on any off-route refuelling.
Capacitive, ultrasonic or float — which fuel sensor fits your fleet?
We fit the sensor to the vehicle, not the other way around. Here's how the three common types compare.
| Sensor type | Accuracy | Best for | Installation |
|---|---|---|---|
| Capacitive fuel sensor | High, calibrated to tank shape | Trucks, buses & tankers with a steady tank geometry | Fitted inside the tank, calibrated on-site |
| Ultrasonic fuel sensor | High, stable through motion | Vehicles on rough roads or frequent stop-start routes | Mounted on the tank exterior — no drilling |
| Float / analog sensor | Moderate | Tractors, generators & budget fleets | Simple fitment, lowest cost of the three |
Exact accuracy and pricing depend on your tank's size and shape and the vehicle type. Our team recommends a sensor after a quick look at your fleet — request a fleet quote for an exact number.
Wherever diesel goes missing
“Maine mere sab truck me fuel senser aur GPS lagaya hai, fuel senser ki accuracy 98 to 99.9% hai. Product achha hai.”“I've fitted a fuel sensor and GPS on all my trucks — the sensor's accuracy is 99.9%. Good product.” Tulshiram Kene · Verified Google Review
Fuel monitoring system — FAQ
What is a fuel monitoring system?
It's a fuel level sensor fitted in the vehicle's tank, wired to a GPS tracker, reporting to cloud-based software. Together they show real-time diesel levels, theft alerts and consumption reports for every vehicle in a fleet.
How does a fuel sensor detect theft?
The system flags a sudden fuel-level drop that happens while the vehicle is stationary or the ignition is off, and sends an alert with the GPS location and time — so you know what happened and where.
Capacitive or ultrasonic fuel sensor — which is more accurate?
Both are high-accuracy. Capacitive sensors suit vehicles with a steady tank shape; ultrasonic sensors tend to handle fuel sloshing on rough roads better. The right choice depends on your vehicle and tank type.
Does this work for tractors, generators and DG sets?
Yes. Float/analog and capacitive sensors are commonly fitted to non-commercial-vehicle assets like tractors, generators and DG sets, alongside a GPS or standalone monitoring unit.
Is a fuel sensor compatible with our existing AIS-140 GPS device?
Yes — Alphatech's fuel sensors are designed to integrate with the AIS-140 approved trackers already installed on commercial fleets, so you're not managing two separate systems.
How much does a fuel monitoring system cost in India?
Pricing depends on the sensor type, tank size and number of vehicles in your fleet. Request a demo and our team will size a system — sensor plus GPS integration — for your exact vehicles.