Metal detector Fisher TW-6

Detecting large metal objects, cables and pipes

The Fisher TW-6 metal detector is based on an invention made by Fisher Research Laboratory Inc. in 1931. The TW-6 features a separate transmitting and receiving coil, unlike most other metal detectors where both coils are integrated. This invention makes it possible to locate deep metal objects such as oil tanks, manhole covers, metal pipes and cables when there is no “starting point” to which a transmitter can be attached. There are three different methods of locating: Method A: With the transmitter and receiver attached to the carrying handle, it acts as a metal detector. Method B: Place the transmitter above ground above the pipe and use the receiver to pick up and follow the signal. Method C: When there is a “starting point”, connect the transmitter directly to the cable or pipe and use the receiver to pick up and follow the signal.