• Sensitivity: 1000 V/m/s differential
• Built-in compass, tilt, temperature, and humidity sensors
• Robust downhole housing suitable for borehole diameters of 100 mm and larger
• Proprietary iSensor™ interface
• Dynamic Range: > 125 dB (0.9 - 15 Hz), > 120 dB (0.9 - 30 Hz)
• Full Scale: 20 mm/s (± 10 mm/s)
• Bandwidth: 1 to 80 Hz (-3 dB) or 8.0 s (0.125 Hz) to 160 Hz (BB version)

The VE-53-DH is a downhole, triaxial short period seismometer designed for seismic monitoring. It features a geophone mass-spring system with electronic feedback, housed in robust austenitic stainless steel. It offers stability against temperature fluctuations and aging, requiring no mass locking. The electronic offset adjustment simplifies installation, and the iSensor™ interface facilitates deployment with built-in sensors. It is compatible with all GeoSIG solutions.

• Configurations: Triaxial, Biaxial, Uniaxial
• Axes Alignment: X – Y – Z H – H – V
• Sensitivity: 1000 V/m/s differential
• Full Scale Range: 20 mm/s (± 10 mm/s)
• Dynamic Range: > 125 dB (1 - 15 Hz), > 120 dB (1 - 30 Hz)
• Non-linearity: ± 0.05% of full scale
• Cross Axis Sensitivity: ± 1% typical, ± 3% maximum
• Bandwidth: 1.1 s (0.9 Hz) to 89 Hz, 8.0 s (0.125 Hz) to 160 Hz (BB version)
• Damping: 0.7 critical
• Full Scale Output: 0 ± 10 V differential

The iSensor™ interface is a proprietary hardware and software interface for operation, control, logging, and data export, featuring a compass, tilt sensor, temperature sensor, and humidity sensor.

• Supply Voltage: 9 to 18 VDC
• Consumption: 60 mA typical, 100 mA max. @15 VDC
• Overvoltage Protection: All pins protected

Test input activated by applying a 12 VDC voltage to generate a pulse output at 50% of full scale.

• Housing Type: Austenitic stainless steel
• Housing Size: φ 89 mm x 502 mm
• Weight: 7.5 kg
• Index of Protection: Watertight up to 10 bar (100 m)
• Temperature Range: -20 to 70 °C (operating), -40 to 75 °C (non-operating)

Cable & connector options and surface control unit available.

Specify type of VE-53-DH, full scale range, depth of deployment, cable length, and other options.