GD-20DX Series Digital Geophone
GD-20Dx-8 / 10 / 14 / 28 / 40
Mainly used in petroleum exploration. Small volume, light weight, stable technical capability, perfect accuracy, wonderful dynamic performance and long service time.
Since Weihai · Exporting Worldwide
Digital geophones, geophone strings & seismic telemetry cables
An integrated geophysical instrument manufacturer — design, production, sales and technical support for seismic exploration worldwide.
About Us
Weihai Grand Exploration Instrument Co., Ltd.
Weihai Grand Exploration Instrument Co., Ltd. is located in the golden district of Weihai Hi-tech Development Zone. Our main products are vibration sensors, speed sensors and digital geophones. We are an integrated exploration enterprise covering design, production, sales, aftermarket service and technical support.
Our products are widely used in petroleum exploration, coal mining exploration, road and bridge construction, dam and tunnel construction, heavy machinery vibration detection and earthquake monitoring. They have been used by oil fields across China and exported to Europe, America, Africa, Southeast Asia and other regions.
We offer the latest technology, excellent products, reasonable prices and complete service to provide firm support for your business.
- 500,000
- Geophones / year capacity
- 50,000
- Telemetry cables / year
- 3-year
- Product warranty
- Worldwide
- Export to 4+ continents
Products
A full geophysical sensing line — geophones, strings, cables and accessories
Geophones
5 series 
GD-XXS Super Geophone
GD-SM24-10 / GD-32CT-10 / GD-SG10-10
Reasonable design, wide frequency band, abundant signal, low distortion, superior and stable properties with precise specifications. Applied to all precise seismic exploration test methods.
GD-XX (SM4) Common Geophone
GD-4.5 / 10 / 14 / 28 / 35 / 40 / 60 / 100
Wide frequency band, high spurious frequency, wonderful signal-to-noise ratio, little phase displacement and perfect resolution. Mainly used in petroleum exploration.
Dynamic Testing Geophone
GD-10J / GD-4.5 … GD-100
Special geophones for groundsill testing. Parameters strictly comply with JGJ106-2002 (Technical Criterion of Architecture Groundsill Testing). Q9 connector output.
GL2 3-Component Geophone String
2-C / 3-C arrays · 8–40 Hz
A practical solution for 2-C and 3-C field arrays. High sensitivity, low distortion, perfect damping, good linear response and split-hair resolution. Waterproof — performs in silt, marsh and loose sandlot.
Geophone Strings
4 series
GW Marsh Geophone String
Insulation ≥300 MΩ @ 6 m / 48 h
New marsh digital-grade geophone strings with excellent water resistance. Small volume, light weight and low distortion — an unparalleled advantage for oil exploration in water areas.
GW Submersible Geophone String
Insulation ≥500 MΩ @ 10 m / 48 h
Submersible digital geophone strings for shoal and coastal waters no deeper than 10 m. Ideal for oil exploration, state inspection and dam prospecting.
GL1 Land Geophone String
Land oil / mineral exploration
An ideal sensor for land oil exploration. Good performance, simple operation, stable and reliable parameters, light weight and reasonable structure. Widely used in oil, mineral and object exploration.
GS Well Geophone String
Deep, high-resolution well logging
High-resolution well-logging seismic exploration geophone string. Wide frequency band, high sensitivity, good signal-to-noise ratio and strong environment-adapting ability.
Telemetry Cables
1 series
Seismic Telemetry Cables
SN388 · I/O-II · Land BOX · ST+ · WPSR · Aram/Aries
Full range of land and waterproof telemetry cables for 408/428, Aram/Aries and other acquisition systems. Polyurethane jacket, operating range −50 °C to +75 °C, anti-draught strength up to 1450 N, customizable lengths and take-outs.
Hydrophones & Accessories
2 series
GD-24 Hydrophone
Swamp / river / bay / transition zone
High-output, pressure-sensitive detector. Transformer-coupled with four piezoelectric crystals in an acceleration-canceling arrangement, molded in a durable polyurethane case with easy-access ports for polarity testing.
Connectors, Leader Cable & Accessories
Take-outs · pigtails · leader cable
A complete range of geophone connectors, take-outs, leader cables and seismic accessories to support full field deployment and maintenance.
Applications
Field-proven across exploration and engineering
Petroleum Exploration
Land and marine seismic acquisition for oil & gas fields.
Coal & Mineral Mining
High-resolution geophones for mining and mineral exploration.
Road, Bridge & Tunnel
Dynamic testing geophones per JGJ106-2002 groundsill standards.
Dam & Hydro Prospecting
Waterproof and submersible strings for marsh, shoal and dam survey.
Earthquake Monitoring
Stable, low-distortion sensors for seismological observation.
Machinery Vibration
Speed and vibration sensors for heavy-machinery condition testing.
Contact
Tell us about your survey
Share your acquisition system, frequency and channel requirements — our team will recommend the right geophones, strings and cables and prepare a quote.
Location
Weihai Hi-tech Development Zone, Shandong, China