How to choose fuel and oil test instruments
By Grant, Inspection Tool Specialists. Reviewed November 2026.
Three things decide which fuel, oil or chemical test instrument you need: the property you must measure, the standard or specification that sets the method and limits, and whether the test is a quick check on site or a laboratory analysis. Answer those first. Methods for fuels and oils are standardised, so the instrument must match the method your standard names.
Which property?
| Property | Instrument | Typical in our range |
|---|---|---|
| Viscosity, quick check in the field | Flow cup viscometer | Ford flow cup PCE-125/4; DIN flow cup PCE-127/4 |
| Viscosity measured in the laboratory | Rotational viscometer | NDJ-1 rotational viscometer; LV-C rotational viscometer |
| Water content in fuel or oil | Karl Fischer titrator | TP-2100 automatic Karl Fischer tester |
| Flash point | Flash point tester | TPC-3000 closed-cup flash point tester |
| Ash content | Ash content tester | TP-508 ash content tester |
| Copper corrosion | Copper strip corrosion tester | TP-113 copper strip tester |
| Cooking oil quality in food operations | Cooking oil tester | PCE-FOT 10 cooking oil tester |
| Octane or cetane of fuel | Fuel quality tester | SX-150 octane and cetane tester |
Method and sample
Temperature control and sample preparation change the result. Use the bath, cup or sample size the method specifies, and record the conditions. A quick field flow cup checks consistency, but it is not a substitute for a laboratory viscosity result where a specification requires one.
Safety
Fuels and oils are flammable and some tests heat the sample. Follow the manufacturer's and your site's handling and fire-safety procedures, and keep ignition sources away from the test area.
Price guide
As a guide to our current range, including VAT: flow cups from about R5,900 to R7,600; cooking oil testers from about R8,000; rotational viscometers from about R10,100 to R28,200; water content, flash point, ash and copper strip testers from about R36,800 to R55,500; laboratory fuel analysers from about R74,600 upwards. Prices change and depend on the method, so check the product pages and confirm the method, standards and accessories each quote includes.
Questions we will ask you
Tell us the product you test, the property and standard the method names, the sample volume and temperature, whether the test is on site or in a laboratory, the limits your specification sets, and the records you must keep. With that we can recommend an instrument and provide pricing.