Differential Pressure Gauges
Guralp Broadband Seismometer Ocean Bottom System (OBS)
The Guralp Systems' Ocean Bottom System (OBS) is a multi-sensor unit comprising:
- a CMG-5T triaxial true broadband feedback strong motion (+/-2g) accelerometer
- a CMG-1T triaxial true broadband (360s-50Hz) feedback seismometer
- a CMG-EAM enhanced acquisition and communications module
- GSL's 'Virtual Sphere' microprocessor-controlled orientation and levelling system
All components of the Ocean Bottom System (OBS) are encased in a cast titanium sphere capable of 3000m deployment. A submersible 25-pin provides inputs for an external Nortek Current Meter and a Differential Pressure Gauge.
Above: Guralp Ocean Bottom System (OBS) is a cast titanium sphere that encases the broadband seismometer and accelerometer instruments.
A Nortek Current Meter and a Differential Pressure Gauge comprise the "Auxiliary Platform" of the Broadband Seismometer system.This auxiliary platform holds a back-up battery to power the seismometer in event of a power outage. Additionally, the Nortek Aquadopp current meter and a differential pressure gauge can be used to help seismologists detect and remove current, tides and wave signatures from seismic data.
Above: Differential Pressure Gauge. Click to enlarge photo.