Excellent Solution For Surveying


Evolving Entry-Level Total Station

  • Construction and Survey Application Software On Board.
  • Best-in-Class Measuring Distance Feature.
  • Reliable Large Volume Internal Memory.
  • Long-Hour Battery Operation.
  • Strong Environmental Specification against Tough Sites.

Improve Topography and Stake Out with features to achieve faster and more efficient workflows
Newly Designed High-End Class EDM

Especially effective in surveying control points that require high-accuracy, and in cross sectional surveying in large areas with reflectorless measurement mode.

All Features are at Top Class



Reliable Large Volume Memory
Internal memory has 50,000 points to record. USB memory can be used up to 32GB.

Distance Measurement Accuracy (Prism Mode)



Measuring Range(Reflectorless Mode)



Superior Basic Feature will Expand Your Application
Strong Environmental Spec
The IP66 rating ensures durability for most any rough job site temperatures and conditions.

Long-life Battery
One battery (BDC70) lasts up to 28 hours, or about four days of normal operation time.

Bright Illumination Key for Nighttime Wor
Key buttons are illuminated to minimze mistakes.

Topcon Provides Japan Quality Products
Topcon performs tough environmental tests to ensure long-term operation even under rough site environment. GM Series total stations are thoroughly inspected with dust-proof and water-proof test chambers. In addition, various tests against vibration, drop, temperature, and humidity were successfully passed to achieve the best environmental spec. Also, the measuring distance accuracy test on base line and the instrument leveling and angle accuracy test and adjustment by collimator system ensure your satisfaction on the GM Series product quality.


Model GM-101 GM-102 GM-103 GM-105
Magnification / Resolving power 30x / 2.5″
Others Length : 171mm (6.7in.), Objective aperture : 45mm (1.8in.) (48mm (1.9in.) for EDM), Image: Erect, Field of view: 1°30′ (26m/1,000m), Minimum focus: 1.3m (4.3ft.) Reticle illumination: 5 brightness levels
Angle measurement
Minimum Display 0.5″/1″ (0.0001 / 0.0002gon, 0.002 / 0.005mil) 1″/5″ (0.0002 / 0.001gon, 0.005 / 0.02mil)
Accuracy (ISO 17123-3:2001) 1″ 2″ 3″ 5″
Dual-axis compensator / Dual-axis liquid tilt sensor, working range: ±6′
Collimation compensation On/Off (selectable
Distance measurement
Laser output Reflectorless mode : Class 3R / Prism/sheet mode : Class 1
Measuring range (under average conditions) Reflectorless 0.3 to 800m (2,620ft.) / Under good conditions*4 : 1,000m (3,280ft.)
Reflective sheet RS90N-K: 1.3 to 500m (4.3 to 1,640ft.), RS50N-K: 1.3 to 300m (4.3 to 980ft.), RS10N-K: 1.3 to 100m (4.3 to 320ft.)
Mini prism 1.3 to 500m (4.3 to 1,640ft.)
One prism 1.3 to 5,000m (4.3 to 16,400ft) / Under good conditions*4 : 6,000m (19,680ft.)
Accuracy (ISO 17123-4:2001) (D=measuring distance in mm) Reflectorless (2 + 2ppm x D) mm
Reflective sheet (2 + 2ppm x D) mm
Prism (1.5 + 2ppm x D) mm
Measuring time Fine 0.9s (initial 1.5s)
Coarse 0.6s (initial 1.3s)
Tracking 0.4s (initial 1.3s)
OS, Interface and Data management
Operating system Linux
Display / Keyboard Graphic LCD, 192 x 80 dots, backlight, contrast adjustment / Alphanumeric keyboard / 28 keys with backlight
Control panel location On both faces
Trigger key Yes (right side)
Data storage Internal memory Approx. 50,000 points
Plug-in memory device USB flash memory (max. 32GB)
Interface Serial RS-232C, USB2.0 (Type A for USB flash memory)
Bluetooth modem (option) Bluetooth Class 1.5, Operating range: up to 10m
Guide light Green LED (524nm) and Red LED (626nm), Operating range: 1.3 to 150m (4.3 to 490ft.)
Laser-pointer Coaxial red laser using EDM beam
Levels Graphic 6’ (Inner Circle)
Circular level (on tribrach) 10′ / 2mm
Plummet Optical Magnification: 3x, Minimum focus: 0.5m (19.7in.) from tribrach bottom
Laser (option) Red laser diode (635nm±10nm), Beam accuracy: <=1.0mm@1.3m, Class 2 laser product
Dust and water protection / Operating temperature IP66 (IEC 60529:2001) / -20 to +60ºC (-4 to +140ºF)
Size with handle 183(W)x 181(D)x 348(H)mm
Instrument height 192.5mm from tribrach mounting surface
Weight with battery & tribrach Approx. 5.3kg (11.7lb)
Power supply
Battery Li-ion rechargeable battery BDC70
Operating time (20ºC) BDC70: Approx. 28hours
Application program
On board •REM Measurement •3D Coordinate Measurement •Resection •Stake Out •Topography Observation •Offset Measurement •Missing Line Measurement •Surface Area Calculation •Route Surveying •Point to Line

Download GM 100 Brochure

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