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Topcon GT-502 Robotic Total Station

  • Topcon GT-502 Robotic Total Station
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Product Description

The GT Series of robotic total stations is a compact, high-performance solution. You get the efficiency of a single-operator robotic system, the power of long-range reflectorless measurements, and performance as a hybrid positioning solution.


UltraSonic technology is the driving force for the GT Series. The UltraSonic motors are the thinnest, lightest, and most powerful on the market – providing you with the smoothest and most accurate prism-tracking possible. It’s a difference you can see and hear immediately.


Our new UltraTrac technology gives you increased prism-tracking strength in all conditions. Advanced instrument algorithms deliver the confidence you need to move ahead. It’s not that you lose line-of-sight, it’s how fast you can reacquire and get back to work.

Ultra-slim and reliable

Featuring a remarkably slimmed down design, the compact system is a third smaller and lighter than any Topcon robotic instrument, yet twice as fast. Without traditional gears or wearing parts, the UltraSonic motors are more rugged and durable – lasting four times longer than previous total stations, and we back it with a five-year warranty.

Workdays turned into workflows

• Direct connectivity to both MAGNET® Enterprise and Sitelink3D global web services
• Easy collaboration from project sites to office staff and managers
• Instant file sharing with both Autodesk® AutoCAD Civil 3D and Bentley MicroStation

UltraSonic Motor

Power like you've never seen before - the fastest robotic motor technology available.

  • Long-lasting gearless design
  • Turning speed of 180° per second
  • Compact motor efficiency

Integrated cellular modem

  • Instant Internet connection from project site
  • MAGNET® Field on-board for team collaboration
  • Asset management through MAGNET® Enterprise service

Sharp display

  • Larger and brighter color touch screen
  • User-friendly interface with simple setup routines and hot keys
  • Faster processor for improved response time

Versatile solution

  • Hybrid Positioning™ with quick addition of compatible Topcon GNSS receiver
  • Compatible with RC-5 remote
  • Reflectorless out to 1,000 m

GT Series is perfect for:

  • Land Surveying 
  • Civil Engineering & Design 
  • Construction Survey/Layout


Specifications :


Resolving power




Angle Measurement







Tilt Angle Compensation


Liquid 2-axis sensor



Distance Measurement

Prism EDM Range

4500 m

Prism EDM Accuracy

 2 mm + 2 ppm

Non-Prism Range

800 m

Non-Prism Accuracy

2 mm + 2 ppm (.03 - 200 m)

Measuring Time

Fine: 0.9 sec


Rapid: 0.6 sec


Tracking: 0.4 sec


LongLink interference-free communication

USB 2.0 Slot (Host + Slave)

RS-232C Serial




Color Touch TFT (800 x 480) Display


24 Keys with illuminator

Battery Operation

Up to 4 hours

Dust / Water Rating


Wireless Connection

Bluetooth Class 1


Integrated cellular modem

Instrument Weight

10.47 lbs with Battery

Operating Temperature

-20°C to 50° C (-4° F to 122° F)

Turning Speed

120° per second


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