The speciality of leak locator are :
1.1. Professional who are timely
2.Long lasting results from experienced and licensed work men
3.Hygienic
4.Fast clean up
The common place to locate leak are ; window leaks,bath tub leaks , tile leaks, wall leaks ,toilet pipe leaks ,over head pipe leaks, under ground pipe leaks, sewer pipe leak.Leak locator uses modern high end technology for leak location service. some of the methods are :
1.Pressure change method
2.Halogene leak detectors
3.Mass spectrometer
4.Radioisotope method
5.Dye penetrable method

More Info: https://www.leak-locators.com/