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The OWS (OYO Wappa Source) is an innovative downhole seismic source suitable for a seismic survey between boreholes (mainly, seismic tomography). Its non-explosive seismic source makes it possible to carry out a survey with almost no damage to borehole walls, and does not require the bothersome legal application procedures as in the case of using the explosives.


High-speed impact rate with the approximate interval of 10 sec has been achieved. Once the device is lowered down into a borehole, the system can extend the seismic excitation consecutively without lifting it up again, which increases user’s work efficiency. Also, it is very user-friendly system owing to its simple structure and operation.


■ High transmission efficiency with low power consumption

■ Excitation with almost no damage to borehole walls

■ Excellent repeatability of signal and trigger

■ Simple structure with easy maintenance


φ50 OWS (Modle-1394B)

Dimensions O.D. φ50mm, Length 2400 mm
Weight 18.5 kg
Sensor for trigger signal Miniature geophone (built-in)
Working environment Temperature Lower than 60 ℃
Pressure In water under the pressure lower than 10 MPa

φ50 OWS controller (Model-1395A)

Dimensions 295 (W)×140(H)×450(D) (mm)
Weight 12 kg (including the power supply section)
Seismic excitation interval About 10 sec
Supply voltage DC 110V (Voltage initially set)
Atmospheric temperature 0~40℃


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