Nguyen The Loc, director of the enterprise in Co Nhue commune, Hanoi's Tu Liem district, allegedly admitted installing an illegalelectronic chip to defraud customers in May this year.
It is estimated that he cheated them of a total of about 15 million VND (780 USD) every month for about three months.
On July 27, Hanoi police and standards inspectors from theDepartment of Science and Technology discovered the petrol station usedthe chip to alter the petrol-pump meter.
The petrolstation, run by Hoang Xuan Loc private enterprise, used the chip to rigthe display of prices and fuel quantities, said Deputy Chief InspectorNguyen Tuan from the municipal Department of Science and Technology.
The fraud enabled the station to sell less gas than displayed on thepump screen, and pocket the difference - about 7.5 percent of everysale.
"Using a standard measuring device, inspectors found that customers lost 0.748 of a litre per 10 litres of petrol, " he said.
"An underground wire connected the chip to a computer in the station'scontrolling room, making it difficult for customers to discover," Tuansaid.
In August last year, the station received acertificate stating that its fuel measurement complied with therequirements of the Vietnam Standards Centre.
The fuel station has been banned from operation until further investigations are completed./.