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Polatrak® EFG

Electric field gradient measurement device for use with the Deep C Meter

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Polatrak® EFG probe

The EFG is an electric field gradient (EFG) measurement device that uses two replaceable silver/silver chloride reference electrodes separated by a known distance (13 inches) to provide a contactless method of determining anode activity and of measuring electric fields in seawater. When passing near a structure such as a pipeline, the current density reading can confirm that an anode is properly activated. Intended for use with the Deep C Meter 3000AD ROV survey system (shown), it’s the ideal complement to the industry-leading ROV-II contact probe.

Operation Manual

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Specifications

KEY ITEMS

ELECTRODE ELEMENTS

2 x Ag/AgCl sealed

DEPTH

3,000m

READING TYPE

Proximity

DEPLOYMENT

ROV

READOUT

Deep C Meter

DATASHEET

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