Sondes for locating underground pipes and conduits

Details Sondes for locating underground pipes and conduits Sondes for locating underground pipes and conduits

2011-01-04

2011-01-04

LeDynh, Bot L (Department: 2858)

Electricity: measuring and testing

Conductor identification or location

Inaccessible

C324S326000, C324S329000

Reexamination Certificate

active

07863885

ABSTRACT:
A sonde includes an elongate flexible ferromagnetic core and a coil surrounds an intermediate segment of the core. A housing surrounds and supports the coil. An electronic drive circuit is mounted in the housing for supplying the coil with an electric signal that will induce the core to emit electromagnetic signals at a predetermined strength and frequency that can be remotely detected. Self-contained battery powered float-type and pill-type sondes are also disclosed.

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Prototek AT-12 and FT-8 transmitter data sheets from the Internet (4 pages).
Prototek FV-40 transmitter data sheet from the Internet.
Prototek FMJ transmitter data sheet from the Internet.

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