Geophone: HKJB Series Intelligent Earthquake Geophone HK Series High-Typical Spurious Frequency Geophone HK20DX serial high false frequency geophones Our products adopt advanced technology, accurate processing equipment and strict management and quality control means. They can be extensively suitable for the exploration of different environments of the earth?s surface, such as marsh, hills, Gobi desert, mountain region, desert, etc.under different association forms.