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. - Temperature of bath and air are controlled separately. Automatically control blowing time and defoaming time, accuracy can reach 0.01s. Press-on joint is easy to dismantle tube.