Petroleum testing is the analysis during upstream, midstream, and downstream production processes of petroleum products. It is most commonly used to test petroleum product, its product components, byproducts of crude oil, fuel, natural gas, upstream oil and gas and other formats of petroleum. - The instrument is used to make determination for vapor pressure of gasoline, volatile crude oil and other volatile petroleum products. It cannot be used to determine the vapor pressure of LGP. It is fully-automatic vapor pressure tester by PC control and operation. Advanced heating technology do separation of water and electricity meanwhile lower the height of water in bath. No blind angle in bath. It can save water and energy and also convenient to be cleaned.