FISHER M-97 Valve & Box Locator
This locator is ideal for locating aluminum, brass, copper, iron, lead, nickel, tin or other metallic survey markers, water or gas meters, conduit, and manholes. M-97 can sense manholes up to 42″ deep and valve boxes up to 18″ deep. Search coil is immersible in water. Operating frequency of search coil: 4.5 kHz. Sensitivity: 0.2mV RMS for full scale. Output indication: meter, 1 milliamp, 0-100 linear scale. Speaker, 16 ohm impedance. Headset, 8 ohm impedance. Audio frequency 450 kHz. Power supply: Two 9V batteries.
FEATURES
- Adjustable shaft with double locking stem
- Ground Effect Rejection VLF eliminates annoying or false signals from wet ground foliage, pavement or mineralized ground
- High sensitivity for maximum penetration through soil, asphalt or concrete
- Built-in Battery Test/Pushbutton Tuning
- Ultra Slow Auto-Tune to stabilize ground tuning and minimize frequency drift
- Identifies metallic objects by speaker sound and needle movement
- Compact size for convenient storage
