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) .