The QPH-500 II series hydrogen generator is an economical and practical laboratory hydrogen gas source product. Compared to traditional laboratory hydrogen gas cylinders, safety has been greatly improved. Therefore, using it instead of laboratory steel cylinders is an excellent choice. It has very simple requirements for the surrounding facilities of the work environment, as long as a standard power supply is provided to operate and produce high-purity hydrogen gas. The electrolyte uses alkaline aqueous solution, and high pH alkaline solution can inhibit bacterial growth on the electrolytic membrane. It can avoid electrolytic membrane contamination caused by microbial growth. And the electrolytic membrane of the instrument does not have high requirements for water quality, so it will not cause membrane poisoning due to water quality problems.