Seismic Geotomographie BGK7 Borehole Geophone
#109603
BGK3/7 | Borehole Geophone
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.
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Natural sensor frequency: |
10 Hz (others on request) |
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Sensor arrangement: |
Tri-axial (BGK3) or 6 horizontal (30°)/1 vertical (BGK7) |
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Operational depth: |
Up to 100 m |
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Receiver length: |
705 mm |
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Receiver diameter: |
50 mm |
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Receiver weight: |
3 kg |
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Cable weight per metre: |
145 g |
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Cable strength: |
2150 N |
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Borehole diameter: |
75 mm (or larger if spacers are used) |
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Clamping system: |
Inflatable bladder |
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Orientation: |
Magnetic compass (+/-2.5°) |
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Depth indicator: |
Cable marking every 2 m |
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Connector: |
To any seismograph |
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Storage: |
On drum |
$120.00
$90.00
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*(Does not include shipping or insurance)