Baoding Earth Science & Technology Co., Ltd. (EST), which belongs to China JIUJIU Group, is a high-tech enterprise registered in the national high-tech zone. The company is specializing in producing and developing geophone, cable, seismic exploration instrument etc, and has an Engineering Department of over 30 years combined experience. It utilizes the latest technology, equipment and most advanced techniques to ensure that all the products offer consistent quality. Its annual production of geophone is over one million pieces.

EST series products have been widely used in oil, gas and coal exploration and national defense monitoring etc. EST main products are as following: EST-20DX series geophone, EST-20DN series geophone, EST-20DC super series geophone, EST-20DS super series geophone, EST-20DG high sensitivity series geophone.

EST is an ISO9001: 2000 Quality System Certified Enterprise and awarded the permit of measurement equipment of PRC. Its products have passed the examination of CNPC. PICC undertake the liability insurance of all products under warranty.

EST always implements the principle of "EST Seek Truth and High Technology" and provides precise equipment and satisfied service for the clients.