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Topcon GM-50 Series

Topcon GM-50 Series

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Advanced Design for Faster Workflows

The GM-50 Series is the perfect entry-level site layout and survey tool offering reliability and flexibility without sacrificing cost or functionality.

The sleek design is built tough, with a water and dustproof IP66 rating, integrated Bluetooth® capability and an internal antenna, enabling you to deliver measurements cable-free to your data controller, streamlining your equipment weight and workflow.

The GM-50 is also armed with a top line EDM, generous internal memory storage, and SDRbasic on-board software so you have everything you need to get the job done out in the field.

  • Integrated Construction and Survey Application Software
  • Fast, accurate, and powerful EDM
  • Reflectorless up to 500m
  • Prism range up to 4,000 m
  • Advanced angle accuracy (2" or 5")
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  • Technical Specifications
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  • Angle Measurement

    • Min. Resolution/ Accuracy: 2”/5”
    • Min. Display: 1”/5”
    • Dual-axis compensator: Dual-axis liquid tilt sensor, working range: ±6’
    • Collimation compensation: On/Off (selectable)

    Distance Measurement

    • Prism EDM Range: 4,000 m
    • Prism EDM Accuracy: 2 mm + 2 ppm
    • Non-Prism Range: 500 m
    • Non-Prism Accuracy: 3 mm + 5 ppm


    • Display: Graphic LCD, 192 x 80 dots
    • Battery Operation: Up to 14 hours
    • Dust/Water Rating: IP66
    • Wireless Connection: Bluetooth® Class 1
    • Operating Temp: -20ºC to 60ºC*
  • Product Downloads Section