The flashpoints of fuels such as kerosene, conventional diesel fuel and biodiesel are determined in the lab, which is crucial when classifying fuels into their respective hazard classes. However, the flashpoint also plays a key role when inspecting engine oils and heat transfer media. If it is significantly reduced, for example, the engine oil is often found to be mixed with a fuel. In the case of heat transfer media, a lower flashpoint indicates the formation of volatile cracking products and an increased risk of fire.

Ten devices are used in the OELCHECK laboratory when determining the flashpoint. One of those devices has now been replaced by a Series 8 Setaflash tester – a machine that we're extremely familiar with. This test device is used to determine the flashpoint in a small, closed crucible in a range of 30 °C to 300 °C. 

The flashpoint is the key criterion for the flammability of combustible liquids. The flashpoint is defined as the lowest temperature at which a vapour phase formed over a liquid can be ignited with a test flame or electric igniter.

For measurements with the Series 8 Setaflash tester, OELCHECK has established the ideal quantity to be just 30 ml. The tester works rapidly and with precision to ensure the samples to be examined are processed quickly one after another.