Large-N devices

• GSB3 3-channel (3C) Unit
• Continuous cable-free autonomous recording
• 24-bit resolution and 124 dB instantaneous dynamic range @2ms sample interval
• Sample Intervals: 0.25, 0.5, 1, 2, 4 ms
• Connector for external geophone
• Battery life: 40 days @ 24 hrs/day operation
• Built-in full resolution test generator
• Solid-state flash memory: 64 GB
• Length x Width 16.94 x 8.89 cm
• Height 7.62 cm
• Weight 1.0 kg
• Operating Temperature Range –40°C to +60°C

Full name: GS-ONE LF 5 Hz 3C LAND (BLUE) GSC8P 2’, 2450 Ω, 67% Damping

Vertical and horizontal mechanical specifications

• Moving Mass 25.2 g
• Maximum coil excursion p-p 3 mm
• Diameter 30.5 mm
• Height 40.7 mm
• Weight 1301 g
• Operating and Storage Temperature Range –40°C to +80°C

Electrical specifications at 25°C

• Open-circuit sensitivity 2.55 V/in/s (100.4 V/m/s) +5%, –5%
• Frequency 5 Hz ±0.5 Hz
• Spurious frequency 160 Hz typical
• Distortion at vertical and horizontal <0.15% measured at 12 Hz with 0.7 in/s p-p
• Open-circuit damping 0.31 to 0.45
• Coil resistance 2450 Ω ±5%
• Sensitivity with 20 kΩ load 2.27 V/in/s (89.4 V/m/s) typical
• Damping with 20 kΩ load 0.67 typical

For deployed GSB status verification and QC

• For collecting QC data on the system functions
• Micro-USB port for uploading, downloading data and charging battery.
• 4 LEDs show radio transmission, reception of status, health of USB connection and charging process.
• Removable battery (Lithium Ion 3.7 Volts 1000 mAH).
• RF transceiver module.
• Removable 16 GB microSDHC flash memory.
• Physical dimensions: 8.5 x 5.2 x 1.5 centimeters
• To monitor the QC data in the field, you need a separate smart phone or pad. Alternatively, you can collect the date "blindly" and inspect it on you computer afterwards.

• Name: BN25
• Length 30.5 cm
• Width 8.6 cm
• Height 8.6 cm
• Weight 4 kg
• Power output 423 WHr (180 days 24 hrs/day)
• Compatible with GSB3 and GSX