ST10: Fuel Compatibility and Cleanliness Testing

AD Systems has developed a portable on-site fully automated instrument for compatibility and cleanliness of 

residual fuel oil and distillate according to ASTM D4740 spot test. 

On board a vessel the ST10 is a good way to measure the compatibility of marine fuels(DM, HSFO, RM, ULSFO, 

VLSFO,…).

This patented portable device – ST10 is a complete automation of the ASTM D4740 method.

All the phases of the test are grouped in a suitcase, the conditioning of the samples, the preparation of the 

spot, its drying and the automatic rating by camera and associated software.

The only phases under the load of the operator are the sampling and the deposition of the drop with the aid 

of a micropipette supplied with the equipment.

As a result, the apparatus can be used anywhere by untrained persons whenever power is available.

The results are stored in a built-in result database. The image of the spot is memorized at the time the spot is 

rated. The ST10 ensures perfect traceability of the test

Principal

The sample is prepared according to the procedure described in the ASTM D4740 test 

method. Once the fuel is dropped on the filter paper, all phases are automatically 

performed. A picture of the spot is automatically taken after the one hour drying phase. 

The picture is binarized and the ST10 reports a 1 to 5 rating according to ASTM D4740.

ST10 Features and Benefits

A complete automated system self-contained in a carrying case 

Designed for both on-board use and lab use.

Standard test method used by conventional laboratories.

Fully automated, no training or analytical knowledge required

Removes subjectivity

Prevent sludge deposits, failure of fuel handling systems and costly combustion related engine damage.

No solvents

Quick and reliable determination.

Full traceability with built-in database

Specifications