Underground Pipe/Cable Locator and Holiday Detector

TINKER & RASOR MODEL PD PEARSON DETECTOR

A. Pearson Type Holiday Detector

The Tinker & Rasor Pearson type detector was designed to locate discontinuities, flaws or breaks in the coating of buried pipelines. This method makes possible the exact location of coating breaks in buried lines without access to the surface of the coated pipe. Locating electrical discontinuities aids in evaluating the application of a coating and also these discontinuities can be repaired to eliminate corrosion and to reduce the amount of current required for cathodic protection.

B. Short Locator

The apparatus is also effective in locating shorts or undesirable electrical contacts to buried coated pipe.

Such electrical contacts should be removed prior to placing a pipeline under cathodic protection, as these contacts would drain a large amount of protective potential from the coated pipe.

C. Pipe Locator

The apparatus can be used very effectively as a pipe locator on coated pipelines that are electrically connected by a screw or welded joints. This application is particularly effective where it is desired to locate and follow one pipeline along a right-of-way where there are a number of buried lines.