1. The Liquid Petroleum Hydrocarbon Tester operates in the same position as the electric oscillation and experiment, reducing the number of adsorption column movements and simplifying the operation process. 2. Liquid Petroleum Hydrocarbon Tester has a double-layer internal pressure protection valve to ensure that the adsorption column is not damaged. 3. The connecting gas line of Liquid Petroleum Hydrocarbon Tester adopts quick connector, which is convenient and reliable.