Beijing Earth Long Science and Technology is a high-tech enterprise with more than 30 years history on the development and production of geophysical exploration instruments and concrete inspection instruments. Our products are widely used in geological prospecting, hydrology, engineering survey, structure quality testing, fields of earthquake monitoring and prediction. We have passed the ISO 9001:2000 quality management system and as a result, our instruments and technology have won many national, provincial and ministerial awards and achievements.

Our concrete non-destructive instruments are DJGW series rebar locators, DJLC-A thickness gauges, DJUS - 05 non-metallic ultrasonic gauges, DJCS-05 crack depth test instruments, DJCK - 2 crack widthometers, DJXS-05 corrosion test instruments and DH2000 resilience data processors. These are manufactured by our company, reaching the leading national technical level, while partial instrument testing methods and testing precision are up to foreign advanced level. Our products have been awarded a science and technology progress prize in 2002 and a DJLC-A national utility patent.

Our geophysical exploration instruments are MCL series magnetometers that contain PM-2 high-precision proton magnetometers, MCL-6 Tri-component magnetometers and MCL-5 fluxgate magnetometers. Our MCL magnetometer is used for hidden magnetite or Iron ore exploration on fields/caves. PM-2 high precision magnetometer is for mineral exploration, iron ore, lead zinc ore, and copper ore. Geoelectrical prospecting instruments are mainly DWJ-3B resistivity & IP receiver, DJF series power supply system (1.5 KW 5KW 10KW three power mode), DD-25 super power resistivity & IP system, and the DU -2 multi-electrode electrical imaging system. The power current of supper-power IP system can reach 25A, exploration depth of 500-800m, effective geophysical prospecting equipment for deep mineral exploration.

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