Geophones single with a bilateral conclusion
Geophones single with a bilateral conclusion
Geophones of the vertical
28 Hz, 270 Ohm Omni Element
10 HZ geophone installed in land case with 3” spike and three meters leader wire, unterminated.
Group of geophones
cases of geophones, the probe, the printed-circuit board with the resistor, the union)
15 Hz, 2400 Ohm Omni Element Regular Temperature