On a visit to a pump in Gazipur, the owner said something strange was happening: at 8 AM the tank held 1,000 litres, and when he measured again at 2 PM it showed 1,030. There had been no delivery. The answer is that the fuel did not increase. The heat made it expand. By evening, when it cooled, it was back to 1,000 litres.
This temperature illusion can cost you lakhs in wrong calculations every month.
Why temperature swings are so large here
A typical Dhaka day looks like this:
- 6 AM: 22°C
- 1 PM: 38°C
- 7 PM: 30°C
- 10 PM: 25°C
That is a swing of 16°C. Diesel and petrol expand by about 0.0008 per degree, so every 1°C adds 0.8 litres to 1,000 litres of fuel. Across a 16°C swing, 1,000 litres reads as 1,012.8 litres. Those 12.8 litres are phantom fuel. They are not really there.
What compensation does
Fuel volume is compared at a standard reference temperature, 15°C. Temperature compensation takes every measurement and works out what the volume would be at 15°C. Heat makes molecules move faster and need more space, so the same fuel takes up more room when it is hot. After compensation, the same 1,000 litres reads as 1,000 litres at 8 AM, at 2 PM and at 8 PM.
What goes wrong without it
- A morning delivery looks short, because the fuel was cold
- Afternoon readings show extra fuel that is not really there, because the fuel has expanded
- The evening stock does not match the books
- Monthly reconciliation takes hours, and the figures never fully agree
Manual versus digital
- Manual: checking temperature takes time, the formula is hard, calculation mistakes are common and nobody can do it 24 hours a day
- Digital: temperature is read continuously, every measurement is corrected automatically, every reading is at the 15°C standard, and you can see the temperature history
How FuelMatix handles it
- Precision temperature sensors at the top, middle and bottom of the tank
- Heat-resistant installation for Bangladesh summers
- Every measurement corrected automatically, so inventory and profit reflect real fuel
- Alerts for unusual temperature readings
Want to see how this works at your station?
Talk to the FuelMatix team and get a free site survey for your pump or depot.
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