Accredited to the ATEX marking II 2 G EEx ib IIC T5, the DMA 35N Ex Petrol is ideally used for QC checks and can be set to display the API number, specific gravity, density in g/cm3 or density in kg/cm3 for the product groups A, B or D (crude oils, fuels or lubricants), referring to a reference temperature of 15 °C or 60 °F.