Fisher M-96 Metal Detector from GISCO

The Fisher M-96 Valve, Pedestal and Box Locator is specifically designed for finding buried or paved-over valves, boxes or vaults. It also locates buried survey markers, wa ter or gas meters, conduit, manholes and other metal ob- jects. These objects can be made of aluminum, brass, copper, iron, lead, nickel, steel, tin or any metal.
With only two knobs and a pushbutton, the Fisher M-96 is easy to use. The M-96 also accepts a larger, optional 11-inch diameter search coil for deeper ground penetration and wider scan. Part #12036227 An optional soft, padded, vinyl carrying bag keeps the M-96 free of dust and dirt. Part #103693 For the ultimate in protection and convenience, an optional hard-shell carrying case with foam padding keeps the M-96 safe and sound. Part #202767.
The M-96 incorporates features not found in any other valve, pedestal and box locator. Pushbutton tuning makes for quick and easy maintenance of the meter level and the "threshold" level of the sound. The "threshold" level is a low tone heard during normal operation when the M-96 is correctly tuned to existing ground and temperature conditions. Pushbutton tuning allows the operator to "detune" the- M-96 for pinpointing the location of buried or covered metallic objects.

The NORMAL MODE provides adequate sensitivity when searching for larger objects, such as manhole covers, valve boxes and pedestals. While in the NORMAL MODE the M-96 is not distracted by smaller metallic items, such as tin foil or other metalic trash.
Special Auto-Tune circuitry provides a continual, but very gradual, retuning of the M-96 operating frequency to counteract any drift caused by temperature and humidity changes.