3D geophone MA1-MA3-VHL15

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Product overview
The MA1-MA3-VHL15 is a downhole three-component (3C) geophone string with three geophones mounted in a Cartesian coordinate system. It is designed for engineering vibration measurements such as shear-wave velocity testing and cross-hole surveys. Wall coupling is provided via airbag coupling or an electric suction box. The assembly supports testing depths up to 130 m and features robust waterproofing. The product uses a traction-resistant exploration cable with integrated length marking; cable length can be customized. Natural frequency range of sensors in the series is approximately 10–35 Hz. One-year warranty applies.

Product category
Downhole 3C string

Key features

• Three-component geophones arranged in Cartesian coordinates (3C).
• Applications: shear-wave velocity testing, engineering vibration measurement, cross-hole surveys, microseismic monitoring.
• Wall coupling options: airbag coupling and electric suction box.
• Testing depth: up to 130 m.
• Traction-resistant cable with length marking; customizable length.
• High waterproofing suitable for downhole deployment.

Technical specifications

• Model: MA1-MA3-VHL15
• Installation: three geophones mounted in Cartesian coordinate system
• Suitable tests: shear-wave (S-wave) velocity, cross-hole, engineering vibration, microseismic monitoring
• Coupling: airbag coupling / electric suction box
• Maximum testing depth: 130 m
• Waterproofing: suitable for downhole use
• Sensor natural frequency: approx. 10 Hz to 35 Hz (varies by model)
• Cable: traction-resistant exploration cable with length marking; customizable length
• Components: sensor cores (single or three-component variants), metal housing, cable, tailcone and accessories
• Environment: adaptable to various borehole diameters and soil/rock layers
• Warranty: 1 year