Vibrahead types
PVL Technologies
Aqua Survey, Inc.
Rossfelder Corporation
Rossfelder Corporation
Ohio Geological Survey
AScI Corporation
Electric resonant vibrator
(VC-3.5)
Electric vibro-torsional
vibrator
(Rossfelder VT-6)
Pneumatic percussive
vibrator
Electric resonant/ vibro-torsional vibrator
(VT-1)
Mechanical resonant
vibrator (w/ clamp)
Electric percussive vibrator (P-3)