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Topcon GM-50 Series Reflectorless Total Station

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Product Description

  • Accuracy options: 2 second or 5 second
  • Display options: Single or Dual
  • Optional optical or laser plummet
  • Versatile entry-level tool
  • Quickly spot and has a phase shift technology
  • Reflectorless range up to 1,640 feet
  • Range with single prism up to 13,320 feet
  • Reflectorless accuracy: 2 + 2ppm x D
  • Coaxial red laser pointer
  • Dual-axis compensation
  • Working range of ±6 degrees
  • Integrates the exclusive Independent Angle Calibration System (IACS)
  • Magnification: 30x
  • Resolving power: 2.5"
  • USB 2.0  port that supports up to 32GB storage
  • Tangent lock securely holds angle in place
  • IP66 dustproof and waterjet protection
  • Magnesium-alloy housing
  • Graphical backlit LCD display
  • 28-key alphanumeric keyboard
  • Uses a Li-ion rechargeable battery
  • Up to 14 hours battery life
Weight 11.3 lbs (5.13 kg)
Dimensions 7.2" W x 7.13" D x 13.7" H (GM-52); 7.2" W x 6.85" D x 13.7" H (GM-55)
Warranty 2-year
Protection Class IP66 dustproof and water jet resistant
Tripod Thread 5/8 x 11
Auto Shut Off No
Internal Memory 50,000 points
Software On-board
Tribrach No
Auto-Tracking Speed No
Guide Light Yes
Angle Measurement
Measuring Method/Reading System No
Detection Method No
Minimum Reading No
Accuracy 2 second, 5 second
Diameter of Circle No
Display Method No
Distance Measurement
Unit of Measure (distance display) m/ft/in
EDM Accuracy (Precision) ±(2 + 2ppm x D) mm (reflectorless); (2 + 2ppm x D) mm (reflective sheet); (1.5 + 2ppm x D) mm (single prism)
Minimum Reading Up to 1,640 ft. (500 m)
Tilt Sensor/Compensator
Range ±6 degrees
Type Dual-axis
Method Liquid-tilt sensor
Setting Accuracy No
Power Source Rechargeable Li-ion batteries, BDC46C
Battery Life Up to 14 hours
Battery Life Alert Yes
Voltage 7.2-volt
Optical Plummet
Image N/A
Magnification 3x
Field of View N/A
Focus Range 19.7 inches (0.5 m) from tribrach bottom
Plate/Tubular Bubble Vial N/A
Circular Bubble Vial 10 minutes (2 mm)
Electronic Level N/A
Length of Tube 6.7 in (170 mm)
Image Erect
Diameter of Objective Lens (Aperture) 1.8 in (48 mm EDM)
Magnification 30x
Field of View 1°30’
Resolving Power 2.5"
Minimum Focus Distance 4.3 ft. (1.3 m)
Ratio of Stadia Lines No
Sight Distance Precision/Focus Range No
Reticle Illumination 5 brightness levels
Reflectorless Yes
Quick Sights (Rough Sights) No
Display and Keypad
Type LCD display
Sides Single (1023562-01, 1023562-03); Dual (1023562-02, 1023562-04)
Keys Alphanumeric
Touchscreen N/A
Backlight Yes
Pixels 192 x 80 pixels
Operating -4 to 140 ºF (-20 to 60 ºC)
Storage N/A
Surveying and Construction Yes
Mapping and GIS (geographic information systems) Yes
Utilities Yes
Environment Studies Yes
Geomarking Yes
Archaeology Yes
Accident Reconstruction Yes
Measurement Range (under fair weather conditions)
Single Prism Up to 13,320 ft. (4,000 m)
Triple Prism N/A
No Prism N/A
Mini Prism Up to 1,640 ft. (500 m)
Reflective Tape N/A
Reflector Sheet Up to 1,640 ft. (500 m)
Cat Eye/Flat Prism N/A
360 Degree Prism N/A
Coordinate Measurement Point Yes
Angle and Distance Stake Out Yes
Stake Out Line Yes
Offsets Yes
Missing Line Yes
Remote Elevation Yes
Resection Yes
Area Calculation Yes
Real-Time Video Imaging No
Measurement Time
Fine 0.9 second
Rapid 0.6 second
Tracking 0.4 second
Laser Plummet
Accuracy <=1.6 inch at 4.3 feet
Class Class 2
Wavelength 635 nm ± 10 nm
Laser Pointer
Class Coaxial red laser using EDM beam
Accuracy N/A
Laser Range N/A
Bluetooth Yes (1023562-02, 1023562-01)
Pin Port RS-232C
Operating System Linux

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