Contact J. R. Overseas company

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44 Lexington Avenue
Gloucester, MA, 01930


J. R. Overseas is a US company (Gloucester, Massachusetts) offering worldwide the finest in marine moisture and corrosion meters.  Our customers include safe-boating enthusiasts such as boat owners, boat manufacturers, marinas, boat yards, boat brokers and marine surveyors.

Order Moisture Meters

Here find our offerings of fine non-destructive marine moisture meters from the world's finest manufacturers: Electrophysics, Tramex and Sovereign.  No marine surveyor, boat owner, boatyard or marina should be without one.

Electrophysics GRP-33


Electrophysics GRP-33


The Electrophysics GRP-33 is a non-destructive marine moisture meter designed to detect moisture in fiberglass and wood.

The GRP-33 model comes with a soft sided instrument carrying case. The analog dial clearly indicates moisture levels in fiberglass (up to 3%) and in wood (up to 30%).

Calibration can be quickly and easily checked and reset with the provided calibration block thereby insuring a lifetime of consistent and reliable readings.  

The Model GRP-33 comes with a 2 year limited warranty.

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