TOM : Tank truck Oil Meter

World-first fuel unloading oil meter for gas stations

TOM :: Tank truck fuel unloading oil meter

Invention of a century! From the beginning of history of fuel industry, precise checking of unloaded mass from tank truck was a big deal.
But with our invention TOM, gas station owner will no longer worry about checking unloaded fuel amount.
This will be world-first affordable tank truck oil meter for gas station owners, with accuracy of 0.1%.


How do you validate unloaded fuel amount from tank truck?

Do you still go up the tanks trucks to check the amount of oil you receive? But do you know that this endeavor is actually meaningless?

It is common mischief to pull out illegal modification to level notch in fuel tank truck, around the world. In Korea, as of Jan 1st, 2015, level notch in fuel tank truck is no longer regulated under legal meter law. It implies that the level notch that you are watching might be invalid one, and not credible.

Fuel transportation process is heavily monitored by numerous auxiliary procedures and sensors. But even with those attempts, illegal attempts are tried everyday, and can't filter out human error or mistakes. And gas station owner have to take in non-pole-signed-fuels as well, which is often not heavily monitored as pole-signed-fuels are dealt with.

We Hi-Level proudly present our solution - our newest invention,
TOM : The tank truck Oil Meter!


Tank truck unloading Oil Meter

  • Product infos
  • Specification
HILevel Refree1 measures the quantity of delivered fuel by the tank truck with 0.1% of accuracy.
(0.1% of normal capacity, 20000liters is 20liters)
Model. HiOM-xxA (xxA:15A,30A,45A,65A)


Model. HiFM-xxA ( xxA : 15A, 30A, 45A, 65A )

Attribute Specifications
Flowmeter type Magnetostrictive Flow Meter (Our invention)
Sensing Type Magnetostrictive Liquid Level Meter
Applicable fluids Two-phase fluid(oil + air), liquid, gas, petroleum products, water, etc.
Flow meter Pipe Diameter Accuracy Remarks
65A or under
(30,000 L/h max)
Better than 0.1 % of reading  
Above 65A
(Above 30,000 L/h)
Temperature Accuracy ± 0.5℃
Specific Gravity Accuracy ± 10 Kg/㎥
Display Character OLED 20 * 4 Display
Display Instantaneous Flow, Elapsed time, Integrated Flow, Temperature, Specific Gravity
Communication RS 485 (Wired)
Bluetooth (Wireless, Optional)
Explosion-proof grade KCs Ex Ia (Optional)
Power Supply DC 5V, Under 1W
Battery 7.2 (V) [3.6(V) * 2] (Optional)
Dimensions 350 (W) * 350 (L) * 600 (H) mm

Official test results for oil meter

TOM passed official testings on oil meter, which meets global standards, and the test results are surprising industry professionals,
who was first reluctant to our findings.

  • Kerosne Test result


  • Test result with KRISS(Korea Research Institute of Standards and Science) with Water


  • Test result with Water


Manufacturing & QC facility

Pictures of calibration site for Oil Meter calibration and validation of tank truck unloading amount.


"I didn't intended to make flowmeter," said Baik, the CEO of Hi-Level, the inventor of 'magnetostrictive flowmeter'.

Our initial goal was to apply some on-the-shelf flowmeter and make oil meter by assemblying it. That was our initial plan for Hi-Level.

But any other flowmeter could not overcome accuracy problem caused by air cavitation. When tank truck is unloading fuel from tank, at the beginning and the end of unloading, air enters and makes great noise. This problem is well known, and was major headache for flowmeter manufacturers.

While doing R&D ourselves, we ended up adding our 'magnetostrictive displacement measurement technology' with traditional rotameter(variable area tapered-shape flowmeter). Since then, we've been pushing our limit to make it commercialized.

Our finding surprises us with its unexpected and cost-effective accuracy. Our invention can measure fluid flow with 0.1% accuracy, even though fluid have air cavitation. And this accuracy is almost equivalent to mass flowmeter types, the most expensive kind.

Hi-Level Co., Ltd. is looking forward bright future with this technology, and hope to apply this finding to numerous application, including air flowmeter, high temperature gas flowmeter, heat meter, large sized flowmeter, and so on. Hi-Level is looking forward mutually beneficial partnership, and will be wait for your friendly inquiries.

For product inquiries and collaboration inquiries,


Flowmeter calibration facility

We purchased company factory building, to accomplish flowmeter commercialization.
Facility is used for flowmeter quality control and product specification validation.