GM-50 Stellar Measurement Performance

Versatile, sleek, precise

Product Highlights

  • Choice of accuracy
  • Optional optical or laser plummet
  • Reflectorless range up to 1,640 feet
  • USB 2.0 port supports up to 32GB storage
  • Coaxial red laser pointer
  • Dual-axis compensation
  • IP66 dustproof and water protection
  •  

The Topcon GM-50 Series Reflectorless Total Station is a versatile entry-level surveying equipment that offers precise and quick angle and distance measurements. Equipped with phase shift technology, the GM-50 total has a reflectorless range of up to 1,640 feet and 13,320 feet using a single prism. In addition, it offers a reflectorless accuracy of 2 + 2ppm, making it ideal for various construction and surveying applications. 

Featuring a coaxial red laser pointer, this Topcon reflectorless total station comes with a dual-axis compensation with a working range of ±6 degrees. It also integrates the exclusive Independent Angle Calibration System (IACS) to further increase measurement stability. The GM-50 offers 30x magnification and a 2.5-second resolving power. For data storage and transfer, this total station has a USB 2.0 port that supports up to 32GB standard thumb drives.

With an IP66 rating, this Topcon total station is protected from dust and powerful water jets. It comes with a magnesium-alloy housing for durability and stable angle accuracy. The GM-50 also boasts a graphical backlit LCD display with a 28-key alphanumeric keyboard that is easy to use and navigate. A great companion for a whole-day job, the Topcon GM-5 uses a Li-ion rechargeable battery that powers up the device up to 14 hours.

Configuration Options The Topcon GM-50 Series Reflectorless Total Station offers four models with different angular accuracies, display, plummet type, and connectivity. Please select your preference from the menus above.

  • – Topcon GM-52 2 Second Reflectorless Total Station with Dual Display & Optical Plummet
  • – Topcon GM-52 2 Second Reflectorless Total Station with Dual Display, Laser Plummet & Bluetooth
  • – Topcon GM-55 5 Second Reflectorless Total Station with Single Display & Optical Plummet
  • – Topcon GM-55 5 Second Reflectorless Total Station with Single Display, Laser Plummet & Bluetooth
 
  • Choice of accuracy
  • 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
General
Weight11.3 lbs (5.13 kg)
Dimensions7.2″ W x 7.13″ D x 13.7″ H (GM-52); 7.2″ W x 6.85″ D x 13.7″ H (GM-55)
Warranty2-year
Protection ClassIP66 dustproof and water jet resistant
Tripod Thread5/8-11
Auto Shut OffNo
Internal Memory50,000 points
SoftwareOn-board
TribrachNo
Auto-Tracking SpeedNo
Guide LightYes
 
Angle Measurement
Measuring Method/Reading SystemNo
Detection MethodNo
Minimum ReadingNo
Accuracy2 second (1023562-02, 1023562-04); 5 second (1023562-01, 1023562-03)
Diameter of CircleNo
Display MethodNo
 
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 ReadingUp to 1,640 ft. (500 m)
 
Tilt Sensor/Compensator
Range±6 degrees
TypeDual-axis liquid tilt sensor
MethodNo
Setting AccuracyNo
 
Battery/Power
Power SourceRechargeable Li-ion batteries, BDC46C
Battery LifeUp to 14 hours
Battery Life AlertYes
Voltage7.2-volt
 
Optical Plummet
ImageN/A
Magnification3x
Field of ViewN/A
Focus Range19.7 inches (0.5 m) from tribrach bottom
 
Level
Plate/Tubular Bubble VialN/A
Circular Bubble Vial10′ /2mm
Electronic LevelN/A
 
Telescope
Length of Tube6.7 in (170 mm)
ImageErect
Diameter of Objective Lens (Aperture)1.8 in (48 mm EDM)
Magnification30x
Field of View1°30’
Resolving Power2.5″
Minimum Focus Distance4.3 ft. (1.3 m)
Ratio of Stadia LinesNo
Sight Distance Precision/Focus RangeNo
Reticle Illumination5 brightness levels
ReflectorlessYes
Quick Sights (Rough Sights)No
 
Display and Keypad
TypeLCD display
SidesSingle (1023562-01, 1023562-03); Dual (1023562-02, 1023562-04)
KeysAlphanumeric
TouchscreenN/A
BacklightYes
Pixels192 x 80 pixels
 
Temperature
Operating-4 ºF to 140 ºF (-20 ºC to 60 ºC)
StorageN/A
 
Applications
Surveying and ConstructionYes
Mapping and GIS (geographic information systems)Yes
UtilitiesYes
Environment StudiesYes
GeomarkingYes
ArchaeologyYes
Accident ReconstructionYes
 
Measurement Range (under fair weather conditions)
Single PrismUp to 13,320 ft. (4,000 m)
Triple PrismN/A
No PrismN/A
Mini PrismUp to 1,640 ft. (500 m)
Reflective TapeN/A
Reflector SheetUp to 1,640 ft. (500 m)
Cat Eye/Flat PrismN/A
360 Degree PrismN/A
 
Functions
Coordinate Measurement PointYes
Angle and Distance Stake OutYes
Stake Out LineYes
OffsetsYes
Missing LineYes
Remote ElevationYes
ResectionYes
Area CalculationYes
Real-Time Video ImagingNo
 
Measurement Time
Fine0.9 second
Rapid0.6 second
Tracking0.4 second
 
Laser Plummet
Accuracy<=1.6 inch at 4.3 feet
ClassClass 2
Wavelength635 nm ± 10 nm
 
Laser Pointer
ClassCoaxial red laser using EDM beam
AccuracyN/A
Reflectorless rangeN/A
WavelengthN/A
Range to reflective tapeN/A
Range to glass prismN/A
 
Interface
BluetoothYes (1023562-02, 1023562-01)
USBN/A
Pin PortRS-232C
Operating SystemLinux
 
RC-PR5 Remote Control System
Operating RangeN/A
Measuring TimeN/A
 
Auto-pointing
One AP PrismN/A
Reflective SheetN/A
360 Degree PrismN/A
Mini PrismN/A
1x Prisma Single
1x Prisma Polygon 
1x Pole Stick 
2x Alumunium Tripod 
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