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. - Automatically fill in or discharge oxygen and detect leakage. Over-tempeature protection device, automatically power off when themperature exceeds set value. Auxiliary heating device guarantees the uniform tempeature field of bombs.