HANGZHOU GUANSHAN INSTRUMENT established in 1988, through 36 years of continuous effort we now become one of the leading pressure gauge manufacturers in China. We are not only own a large market share in domestic using our own independent GUANSHAN trademark, but also export to Europe, America, Middle East and Southeast Asian markets. Currently we have three companies, each company focuses on different fields. The Hangzhou headquarter (manufacture all kinds of gauges), Anhui subcompany (manufacture the pressure gauge’s 4 main parts) and Shanghai subcompany (manufacture and develop gauges apply to monitor SF6 gas in power industry).As a professional company of export trade, we have a professional production and development sales team, to provide customers with a variety of OEM production and customized services. Sincerely welcome you to choose GUANSHAN instrument.