Completely molded unit with waterblock
eliminates water entry
Less exposed leader wire
Minimal sensitivity change from 1-656 ft.
Higher geophone and hydrophone output
Anchor slots for tie wrap or other material
to facilitate taping unit to cable
The GS-PV1-S Dual Sensor minimizes ghosting by combining pressure sensing (hydrophone) and velocity sensing (geophones) into a single unit.
For ocean bottom cable applications, combining the output of geophones and a hydrophone is now a widely accepted technique for reducing ghosting. To overcome the disadvantages of using two separate sensors, Geo Space now offers both pressure sensing and motion sensing in one unit. To achieve vertical orientation, the geophones are gimbal mounted and positioned adjacent to the hydrophone with all elements in a single waterproof enclosure. Boot guard available for added protection.
Velocity Sensor :
2 each GS-30CT:
Natural Frequency : 10 Hz } 2%
Sensitivity : 2.55 volts/in/sec } 2%
Damping : 0.70 } 2% (.686 to .714)
DC Resistance : 3677 ohms } 4%
Pressure Sensor
Natural Frequency : 10 Hz } 15%
Sensitivity : 6.76 volts/bar } 1.5 dB
Sensitivity change at operational depth less than 3 dB :
Damping : 0.70 typical (.60 to .80)
DC Resistance : 871 ohms } 5%
Operational Depth : 1 - 656 ft.
Dual Sensor Physical Dimensions :
Length : 14.25 in (36.20 cm)
Diameter : 2.50 in (6.35 cm)
Weight : 4.50 lb (2.04 Kg)
Consult the factory for information on customizing geophone and hydrophone parameters to your required specifications.
Specifications @ 25C, atmospheric pressure
Specifications are subject to change without notice.
Charts for Response Curve Output VS. Frequency (@871 ohms, @3677 ohms).