Hand-held electronic locators that determine and display the location of utilities buried underground and hidden in walls of structures based on electromagnetic emissions comprising antennas connected to a housing enclosing battery powered electronic circuitry; electronic transmitters for applying signals to buried and hidden pipes and conduits for enabling their location to be determined comprising electrical cords connected to battery powered circuitry enclosed in a housing; clips and inductive couplers that connect to battery powered transmitters via electrical cords for applying locating signals to buried pipes and conduits; and electronic sondes for insertion into pipes and conduits for emitting electromagnetic signals to aid in their location comprising small battery powered radio frequency transmitters that are enclosed in housings
Electrical and Scientific Apparatus