GFA 50/100 3D borehole geo-phone is realized with 3x high sensitive geophones (nat.freq.10 Hz- 1 vertical and 2 horizontal sensors) oriented according to a triad of orthogonal Cartesian axes XYZ. Delivered with a cleat assembly to sustain its weight at the requested depth (GFA cable is graduated in meters), this borehole geophone has a pneumatic-mechanical clamping system.

Applications: DOWN HOLE / CROSSHOLE / Vs30

• 3 x 10 Hz geophones (1vert.+2horiz.)
• Cable length 50 or 100m, graduation 1 meter
• For boreholes with diameter from 50 and 110mm (larger diam. on request)
• Probe dimensions: diam. 50mm, length 570mm
• Cable reel dimensions: 540x400x250mm
• Total weight (reel+cable+probe): less then 12 kg for Mod. GFA-50
• Cannon NK2721C or Souriau connector (other on request)
• Cable reel with 50/100 m of cable
• Pneumatic-mechanical clamping (with manual pump included)
• Air purge valve