http://ditchwitch.com/utility-locators/pipe-cable-locators/830R-T/

Identifying and tracing utility lines can be tricky business. A simple way to improve your frequency of success is the Ditch Witch® 830R/T electronic locating system. Made to withstand the demands of rugged jobsites, the exceptionally easy-to-use 830R/T offers outstanding performance at a very high active frequency.

Only the 830R/T enables you to locate both gas mains and gas feeder systems. In short, the 830R/T has everything you're looking for in a contractor-grade locating system.

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http://ditchwitch.com/request-product-information