GeoTomographie BGK7
The borehole geophone BGK3 is used to receive P- and S-waves in dry or water filled boreholes. The borehole geophone BGK3 consists of a tri-axial sensor whereas the BGK7 consists of six horizontal sensors, separated by 30° intervals, and one vertical sensor. The geophone is coupled to the borehole wall by a pneumatic clamping system (inflatable bladder).
Air is supplied to the BGK3/7 through an electro-pneumatic hybrid cable with a Kevlar tension string. A magnetic compass shows azimuthal deviation to North and can be used to get the orientation of the geophone in the borehole. The cable is terminated by a connector to the seismograph.
3 inch borehole diameter needed for bladder. Natural sensor frequency: 10 Hz (others on request) Sensor arrangement: Tri-axial (BGK3) or 6 horizontal (30°)/1 vertical (BGK7) Operational depth: Up to 100 m Receiver length: 705 mm Receiver diameter: 50 mm Receiver weight: 3 kg Cable weight per metre: 145 g Cable strength: 2150 N Borehole diameter: 75 mm or 3 inches Clamping system: Inflatable bladder Orientation: Magnetic compass (+/-2.5°) Depth indicator: Cable marking every 2 m Connector: To any seismograph Storage: On drum
| Natural sensor frequency | 10 Hz (others on request) |
|---|---|
| Sensor arrangement | Tri-axial (BGK3) or 6 horizontal (30°)/1 vertical (BGK7) |
| Operational depth | Up to 100 m |
| Receiver length | 705 mm |
| Receiver diameter | 50 mm |
| Receiver weight | 3 kg |
| Cable weight per metre | 145 g |
| Cable strength | 2150 N |
| Borehole diameter | 75 mm or 3 inches |
| Clamping system | Inflatable bladder |
| Orientation | Magnetic compass (+/-2.5°) |
| Depth indicator | Cable marking every 2 m |
| Connector | To any seismograph |
| Storage | On drum |
Every rental ships with the cables, batteries, chargers, and documentation needed to survey on arrival, packed in a transit case. Tell us about your job and we will confirm the exact configuration for your dates.
Datasheets, quick-start guides, and field videos for the GeoTomographie BGK7 are available on request while we build out the library. Ask for the documentation pack.
Build your rental
Pick your dates and we will confirm availability, final rates, and a proposal, usually the same business day.
Choose your dates
Rental days run door to door and include weekends. From 28 days the monthly rate applies automatically.
Shipping
Rentals travel on your own carrier account in both directions, so freight is billed to you directly and never marked up by us.
