Qingdao Guolin Technology Group Co., Ltd. designs, manufactures, installs, commissions, operates, and maintains ozone equipment in China and internationally. Its products include ozone generators, hydrogen machine water, oxygen atom generators, sterilizers, glyoxylic acids, gas detecting and ozone concentration analyzers, ball valves, thermostatic chillers, water-cooled cabinet industrial air conditioning and refrigerated air dryers, piezoelectric ceramics, ozone gas delivery systems, electronic grade ozone gas generators, semiconductor ozonated water systems, photovoltaic concentration ozonated water systems, ozone dissolved concentration analyzers, and mobile type ozonated water systems. These products are used in municipal water, wastewater, industry sewage, flue gas denitrification, chemical oxidation, petroleum, semiconductor, medical, agriculture, and other fields. The company was formerly known as Qingdao Guolin Environmental Technology Co., Ltd. and changed its name to Qingdao Guolin Technology Group Co., Ltd. in January 2023. It was founded in 1994 and is headquartered in Qingdao, China.