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 determine the foaming tendency and stability of lubricating oils. he instrument adopts all-in-one structure. It includes three parts: low temperature test part and it’s control, high temperature test part and it’s control, a portable cooler for low temperature test part. The instrument equips an automatic timing alarm.