GENEQ > Materials testing > Locators

Pipe and Cable Locator
Model TW-6


The Model TW-6 "Two-box" metal detector finds underground pipes, cables, manhole covers, vaults, valve boxes and other metallic objects. Like earlier models, 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.

FEATURES
  • Crystal controlled frequency in both transmitter and receiver increases tracing distance 50-100 percent over earlier two-box detectors.
  • 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 signal to indicate the presence of metal. Even after the meter pegs, the audio signal goes much higher in pitch and volume.
  • Noise cancelling circuitry eliminates power line interference.
  • Powered by 16 standard AA (penlight) bateries: eight in the transmitter and eight in the receiver.
  • Weights only 5 1/2 pounds.
The TW-6 shows where to dig, as well as where NOT to dig, an important consideration when working near gas lines.
To increases the instrument's sensitivity, Fisher engineers removed all unnecessary metallic parts on the TW-6, replacing them with durable ABS molded plastic. Newly designed coil windings, completely upgraded electronics and nonmetallic parts have boosted the tracing distance of the TW-6 by 50-100 percent.
With the TW-6, longer tracing distances, which used to require expensive high-powered fault locator/tracers, can now be accomplished economically.
SPECIFICATIONS
 
Transmitter
Receiver
Operating frequency
81.92 kHz + .005%
81.92 kHz + .005%
Batteries
8 each, AA (NEDA15)
8 each, AA (NEDA15)
Weight
2 1/2 lbs (1.1kg)
3 lbs (1.36kg)
Sensitivity
N/A
Normal: 400 uV typical
High: 8 uV typical
Signal-to-noise ratio
N/A
110 dB
Headset Impedance
N/A
600 ohms (stereo)
Dimensions
11 1/2 x 9 x 3 inches
(29 x 23 x 7.6 cm)
11 1/2 x 9 x 3 inches
(29 x 23 x 7.6 cm)
Operating temperature
-10°F to 120°, (-23 to 48°C) depending on batteries used.
Total weight
5 1/2 lbs. (2.5kg) - (without handle of accessories, grounds plate assembly or operating manual).
Total shipping weight
6 3/4 lbs (3kg) - (including only ground plate assembly and operating manual).
Total shipping volume
.69 cu, ft. (19.5 liters)

CAT. NO. DESCRIPTION
FITW6-000 Pipe & cable locator model TW-6
FI202259-0 Ground rod assembly
FI201809-0 Carring case
FI202727-0 3-piece handle kit
FI203400-0 Coupling clamp
FI202295-0 Tracer probe
FI972095-0 Stereo headphones