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Amprobe AT-3500 Underground Cable Locator

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AT-3500 cable locator
AT-3500 cable locator
Amprobe AT-3500 Underground Cable and Pipe Locator

Keep productivity high and operational costs low, with the Amprobe AT-3500 Underground Cable Locator. It is the rugged, economical solution for locating cable, wires and pipes that are underground if they are energized or de-energized. Great for parking lot and airport lighting applications, it precisely pinpoints buried services, with exceptionally fast sound and meter response.

The backlit, multiple-segment, bar graph, digital display, plus audible indicators easily locate cables and wires. The AT-3500 Underground Cable Locator employs the proven 33 kHz frequency for most locating applications. To avoid lines at utility construction sites, it also offers the highly sensitive power and radio modes. Take depth measurements with the simple press of a button.


  • Locates underground energized and de-energized wires, cables and pipes
  • Three testing modes for best accuracy
  • – Passive Power (50 / 60 Hz)
  • – Passive Radio (RF)
  • – Active T-3500 signal generator with induction mode directly connected to the cable with test leads or optional clamp
  • Active Mode Depth measurement up to 16’ (4.9m)
  • Semi-automatic gain control – fast signal location and control
  • 33 kHz active frequency – best frequency for general locating
  • Precise pinpointing of buried services and exceptionally fast sound and meter response with backlight multiple multiple-segment
  • Complete instrument, ready for use with receiver, transmitter, connection cable, ground stake and ground cable
Depth Measurement:    10 ft
Passive Tracing Frequencies:    50 / 60 Hz
Transmitter Frequency:    Single, non-adjustable
R-3500 Frequency ranges:    Range 1: radio 15 kHz to 23 kHz
R-3500 Frequency ranges:    Range 2: power network 50 Hz / 60 Hz; optionally 100 Hz (can be adjusted by Amprobe service personnel)
R-3500 Frequency ranges:    Range 3: transmitter 32.768 kHz
R-3500 Sensitivity at a depth of 1m:    Range 1: radio >20 ìA
R-3500 Sensitivity at a depth of 1m:    Range 2: power network >7 mA
R-3500 Sensitivity at a depth of 1m:    Range 3: transmitter >5 ìA
R-3500 Power Supply:    10 x IEC R6 / AA cell / Mignon
R-3500 Operating Time:    40 hours (for intermittent use with alkaline batteries, 20 °C)
R-3500 Weight:    2.5 kg (5.51 lbs)
R-3500 Dimensions (W x H x D):    99 x 660 x 252 mm,(3.90 x 25.98x 9.92 in)
T-3500 Transmitted Power:    0.1 W / 0.5 W (switchable)
T-3500 Frequency:    32.768 kHz
T-3500 Power Spply:    6 x IEC R20 / D cell / Mono
T-3500 Operating Time:    40 hours (for intermittent use with alkaline batteries, 20 °C)
T-3500 Weight:    1.7 kg (3.75 lbs.)
T-3500 Dimensions (W x H x D):    260 x 255 x 140 mm (10.24 x 10.04 x 5.5 in)
T-3500 type of protection in accordance with EN 60529:    Dust and water protected IP 56
Model NameDescription
AT-3500
  • Locates underground energized and de-energized wires, cables and pipes
  • Three testing modes for best accuracy
  • – Passive Power (50 / 60 Hz)
  • – Passive Radio (RF)
  • – Active T-3500 signal generator with induction mode directly connected to the cable with test leads or optional clamp
Included Accessories:   Receiver, transmitter, connection cables, ground stake, carrying case, users manual, batteries(installed)
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