Locating Valve Boxes

 Searching in the vicinity of a chain link fence requires a reduced Gain setting and also some control over the orientation of the locator. As illustrated in Figure 3-10, position the locator horizontally with its long axis perpendicular to the fence. This ensures that the upper sensor is kept away from the fence.

 

Both the valve and its casing, when iron, provide strong magnetic fields which make them easy to locate.

Plastic enclosures containing magnets are easily located at depths of 10 feet or more.

 Figure 3-12. Locating Valve Boxes Boxes and Casings