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Technology Factsheet

TW-6 Pipe and Cable Locator

Category: Characterization > Utilities Identification > Electromagnetic
Reference # : Model No : TW-6

The Model TW-6 “Two-Box” metal detector finds underground pipes, cables, manhole covers, vaults, valve boxes and other metallic objects. The TW-6 is used primarily by water departments, telephone companies, power companies, gas companies and petroleum pipeline companies when making repairs and rearranging lines. The TW-6 shows where to dig, as well as where not to dig. To increase the instrument’s sensitivity, Fisher engineers removed all un¬necessary metallic parts on the TW-6, replacing them with durable ABS molded plastic. Coil windings are designed with completely upgraded electronics and nonmetallic parts have boosted the tracing distance of the TW-6.


• The TW-6 is the industry leading 2-box locator • The TW-6 is excellent for blind searches • Crystal controlled frequency in both transmitter and receiver increases tracing distance • Unlike other units that use a separate transmitter and receiver, the TW-6 when mounted on the handle, can conduct "blind" searches of an area to locate an underground pipe or cable when the starting point is unknown • VCO (Voltage Controlled Oscillator) gives a wider range of audio single to indicate the presence of metal. Even after the meter pegs, the audio signal goes much higher in pitch and volume • Noise canceling circuitry eliminates power line interference






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