Borehole Geophone
BH-SGS — Soft dB's Triaxial Smart Sensor
Accurately measure underground vibrations that are generated by mining, construction, and other activities — with the BH-SGS Smart Triaxial Borehole Geophone. Effectively monitor vibration levels near buried infrastructure and tailings dams.
Robust and IP68-rated, the BH-SGS offers exclusive Soft dB features: simplified surface-accessible electronics, low-cost replacements, interference-free digital transfer over long distances, automatic sensor check, and much more.
Measure Underground Vibrations
Microseismicity
Tunnels and Sewers
Tailings Dam
Underground Infrastructures
Key Features of the BH-SGS Smart Triaxial Borehole Geophone
Automatic Sensor Check
- Built-in intelligence that verifies the sensor's operation on a daily basis, which is essential for ensuring the reliability of measured data.
Control Electronics Separately from the Sensor
- Surface-accessible electronics box reduces borehole geophone replacement costs.
Flexible Alarm System for Threshold Exceedances
- Alarms can be adjusted to specific frequencies according to the criteria of the project.
Wide Dynamic Data Range
- Measurement of vibration levels range from an impressive few micrometers per second.
Vibration Data Every Second
- An ideal feature for monitoring vibrations that may affect the integrity of underground infrastructures and tailings dams.
Superior Signal Quality
- There is no data interference between the electronic box and the station.
Wide Measurement Range
- RMS value.
- Peak particle velocity (PPV, PVS).
- Continuous time signal.
- 1/3-octave spectrum (0.5-400 Hz).
- FFT (Pro Stations only).
2 Models for a Wide Range of Applications
- ISEE-BH (2-250 Hz, 120 mm/s).
- DIN-BH (1-80 Hz, 120 mm/s).
Designed for Extreme Conditions
- IP68 protection.
- Operating temperature: -40ºC to + 50ºC.
- Robust cable.
- Adaptable for mines/quarries, construction sites, tunnels and subway/metros, and oil & gas exploration.
Efficiently Monitor Tailings Dams and Underground Infrastructures
The BH-SGS Smart Triaxial Borehole Geophone is a high-precision seismic sensor designed to measure underground vibrations generated by mining, construction, blasting, oil and gas exploration, and more.
The borehole geophone can be inserted into standard boreholes, so it can closely measure and monitor the vibration levels near underground structures, such as gas pipes, drinking water networks, tunnels and sewers, and thus help protect the integrity of the infrastructure.
The BH-SGS can also be used in the mining sector to monitor the condition of tailings dams and the risk of liquefaction or landslides, in the event of excessive vibration levels caused by blasting or seismicity.
The BH-SGS consists of an intelligent triaxial geophone, known as the Smart Geophone Sensor (SGS), and a surface-accessible digital signal processing module, enabling cable lengths of over 100 meters.
Surface-Accessible Control Electronics
Achieve economies of scale.
Soft dB has strategically designed the electronics to be housed inside a box, separate from the sensor. This allows for the box to be positioned at surface-level, while also being connected to the vibration sensor buried deep underground by a robust cable that can reach over 100 meters.
In the event that the sensor cannot be recovered, a request can be made for a new sensor replacement from the Soft dB team, and they can pair it with the existing box. By only requiring a replacement of a new transducer and not the electronics, sensor replacement costs become significantly less.
This allows you to use only a limited number of electronic units during your operations, and to replace sensors at a much lower cost.
Automatic Sensor Check
Get reliable continuous data, even before backfilling!
Every day, all sensors undergo an automatic check to ensure that they are operating optimally and that the data being measured is reliable.
A practical and effective feature for remotely checking the correct operation and vertical alignment of your sensor, especially before backfilling!
Technical Documentation
Download data sheet
Comparison of 2 BH-SGS models: ISEE-BH (SGS0-00005) and DIN-BH (SGS0-00006)
| Model | ISEE-BH (SGS0-00005) | DIN-BH (SGS0-00006) |
|---|---|---|
| Lower Frequency Limit, Fu (Hz) | 2 | 1 |
| Upper Frequency Limit, Fo (Hz) | 250 | 80 |
| Axis Peak Maximum Velocity (mm/s)* | 120 | 120 |
| Axis Peak Maximum Displacement (mm)* | 0.75 | 1.5 |
| Axis Peak Detection Limit (um/s)* | 45 | 30 |
| V-Sum Peak Detection Limit (um/s)* | 75 | 50 |
| Axis RMS Velocity Noise (um/s)* | 15 | 10 |
| V-Sum RMS Velocity Noise (um/s)* | 25 | 15 |
| Available KBFt | Non | Oui |
| Standard | ISEE | DIN 45669 |
* Values in the above table are minimum specifications. Typical peak maximum velocity is higher and typical vibration noise levels are lower.
→ See the "Frequency Response" graphs for each model in the spec sheet
Need a Quote for the BH-SGS Smart Borehole Geophone or Advice on Vibration Monitoring?
The BH-SGS is compatible with all Soft dB monitoring stations, allowing the benefits of a complete, state-of-the-art solution, for simplified, efficient management and maintenance. The SGS-BH is the ideal sensor for measuring underground vibrations, effectively protecting buried infrastructures and tailings dams.
Contact our vibration monitoring experts