HangZhou ROCK Biological Technology Co., LTD. is a comprehensive water quality analysis instrument manufacturer. Setting the advantages of similar products nationally and internationally, HangZhou ROCK is the production of PH meter, PH electrode, ORP meter, conductivity meter, do meter, refractometer, scale, do meter etc specialized enterprise. We have advanced equipment and perfect testing instrument. All the products will be tested strictly before sending from our company to assure the quality. HangZhou ROCK is devoted to reach R&D, OEM, SALE, agency, in the same time, we attach great importance to product after-sales service. The company was founded in 2001, since establishment , We follow first-class talent, first-class management, first-class technology, first-class service policy, our products are mainly for water quality analysis industry, Sincerely look forward to working with all the friends and seek common development! contact information is as follows: Sales manager: ally cao HangZhou ROCK Biological Technology Co., LTD address: Jichang road, jianggan area, hangzhou, zhejiang province, china MSN/email:***** Phone:086-13858169046