The document discusses JSN Fuel oil flow meters, which are positive displacement flow meters that provide precise volumetric flow measurement of liquids like fuel, petrol, alcohol, and grease. The chief engineer is formerly from Siemens, and all CNC machines use Siemens systems, allowing the fuel oil flow meters to achieve the highest standards with capabilities like measuring flows as low as 0.1ml/min. The fuel oil flow meters are suitable for a variety of industries and can measure clean liquids found in broad applications involving fuels, oils, lubricants, alcohols, and more.