Misfuel Identification and Avoidance System

What is Midas?

A misfuel identification system that is fitted to the above or below ground filling points on each bulk fuel storage tank at petrol filling stations. The unit comprises of a valve with intelligent control that can discriminate between petrol and diesel grades of fuel. The purpose of the unit is to stop the wrong product entering the tank and causing a misfuel.

Why specify it?

The design and development project was initiated following a meeting on a petrol forecourt with oil company engineers, who indicated that misfuelling storage tanks with incorrect fuel was a major issue, both environmentally and financially.

Midas protects your business from costly contaminated fuel uplifts and disposals
Midas ensures there’s no associated disruption to your forecourt
Midas protects your customers from misfuelling their vehicles
Midas protects your business from 3rd party damages and claims
Midas protects your brand image

How does it work?

The device will be calibrated during installation for either Diesel or Petrol products. The system will then instantly read the fuel that’s being delivered and if correct open the valve to allow the filling operation to continue. If an incorrect fuel type is detected the valve will stay closed and the unit will alarm both audibly and visually to alert the driver to the mistake.


ATEX – Europe
FM – North America
CSA – Canada
IECEx – International
TR-CU GOST-R – Russia

Technical Details

The Midas utilises a low current high torque motor to operate the control valve. The valve offers a complete seal against product entering the unit from the delivery side and likewise for vapour build up from the tank side. This ensures that when the cap is opened there is no excessive release of voc vapours around the delivery driver position.

All communication to and from the Midas is done wirelessly via infra-red communications. The system is fully automated and requires no interaction from the tanker driver except for a prompt to “wake up”.

Motion activated key fobs are required to interact with the Midas for functions such as normal operation, override and reset. Override and reset function keys can be kept in store or secured in DCD cabinets in the event of an attempted misfuel. Any communication with the unit in regards to calibration, parameter changes, data capture and diagnostics is done via a hand held Datatec unit.

Due to the low power requirement and mechanical wear the unit requires minimal maintenance. Midas is self powered by an internal battery pack, and power calculations done on a site experiencing two deliveries per day indicate a typical battery life expectancy of 5-7 years.

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