Racotech Geophysical Instruments (RGI) is a leading manufacturer and supplier of seismic instruments. We specializes in design and manufacture high quality and international standard seismic geophones, strings, connectors, geophone cases& accessories for geophysical, oil and gas exploration, mining industries around the world. Racotech is tier one supplier of CNPC (China National Petroleum Corporation), and material supplier of BGP (Bureau of Geophysical Prospecting, CNPC).