{"id":4089,"date":"2017-08-16T23:07:36","date_gmt":"2017-08-16T21:07:36","guid":{"rendered":"http:\/\/www.delfind.pl\/?p=4089"},"modified":"2026-02-19T14:23:36","modified_gmt":"2026-02-19T13:23:36","slug":"underground-utility-location-guide","status":"publish","type":"post","link":"https:\/\/sklep.geoscanners.pl\/en\/lokalizacja-sieci-podziemnej-za-pomoca-lokalizatora\/","title":{"rendered":"How to locate underground utilities: methods and choosing a locator"},"content":{"rendered":"

Underground utilities can be located using passive or active methods, sondes, tracer wires and ground-penetrating radar. The choice depends primarily on the utility type, pipe or cable material, access to a connection point and site conditions.<\/p>\n

First, identify the utility type<\/h2>\n

Before surveying, gather plans, information from the utility operator and visible site markings. Establish whether the target is conductive, can carry an active signal, has a tracer wire or is a plastic pipe. This determines the method and equipment required.<\/p>\n

Records are not a substitute for a survey, and survey results should not be interpreted without context. Confirm the utility route at several points and indicate the confidence level of the result.<\/p>\n

Underground utility locating methods<\/h2>\n

Passive modes<\/h3>\n

A locator can detect signals from live power cables or radio signals coupled onto conductive infrastructure. This is useful for an initial site sweep, but the absence of a signal does not mean that no utility is present.<\/p>\n

Active methods using a signal transmitter<\/h3>\n

A signal can be applied by direct connection, with an inductive clamp or by induction from the surface. Direct connection generally makes it easier to distinguish the target conductor, whereas induction may also energise adjacent metal objects. The operator should monitor direction, signal strength and continuity.<\/p>\n

An example of a current solution for precise tracing is Leica DT100 locator<\/a>, which can be used with the Leica DE100 signal transmitter<\/a>. Entry-level and more advanced models can be compared in the category cable and pipe locators<\/a>.<\/p>\n

Sonde or tracer wire<\/h3>\n

Where a non-metallic pipe is accessible, a sonde with its own transmitter or a tracing rod energised by a signal transmitter can be inserted. A sonde is located point by point, while the rod enables tracing along its entire inserted length. Always check the diameter, ensure the pipe is clear and verify compatibility with the locator.<\/p>\n

GPR system<\/h3>\n

GPR is particularly useful for non-conductive targets or where no connection point is accessible. It records not only the pipe or cable itself but also changes in the ground and backfill. Its effectiveness depends on ground conditions, depth, diameter and antenna configuration. For more on this method, see our guide how to locate water pipes using GPR<\/a>.<\/p>\n

How do I choose a locator?<\/h2>\n