GT Total Station

  • Features
  • Specifications

GT Total Station

    Bright, Sharp Guide Light

    The Guide Light allows operators to instantly recognize the line between the instrument and the stakeout line, with clearly visible Green and Red lights.

    RC handle (GT-1000 series)

    RC-5 sensor on the handle can be used for auto-prism searching. This allows easy, rapid prism searching regardless of your position.

    Trigger key

    Just “Rough Aim” and “Press Trigger button” to get precise aiming and measurement automatically and easily.

    Jog dial

    You can rotate GT with smooth jog dial.

    USB available

    Serial cable and USB connections can be used (Max:32GB) for data transmission/reception.

    Large display

    Large and high-resolution WVGA display provides clear visibility under the sun light. Moreover, large size icon improves operability.

    Waterproof and dustproof:
    IP65 design

    Provides protection from dust and driving rain as well as other inclement weather conditions. Operates in temperatures from -20 to +50ºC.


    Increases power for prism tracking under extreme conditions of frequent interruption or strong reflections.
    Even if a prism rock is lost, you can easily rotate GT and reacquire prism with RC-5 and go back to work smoothly.


    Precise measurement can be done by just “Rough Aim” and “Press Trigger button” without lens focus and other operation. Auto-collimating provides consistent accuracy and speed regardless of operator’s skill levels and condition.

    The world's fastest! *
    UltraSonic motor and direct drive system!

    Accomplished world's fastest turning speed of 180° per second with UltraSonic motor and direct drive system. This also contributes to ultra-slim body.

    The world's lightest *
    Accomplished weight-saving, 5.7 kg motor drive total station!

    GT is a third smaller than any previous Topcon robotic instrument and the same weight as a manual total station — providing easy carrying and set up at a project site.

    The world's smallest! *
    Redesigned ultra-slim body!

    GT is designed by reviewing of the basis and redesigned to the world's smallest total station.

    World's first Internetconnected( IoT) total station!*
    Integrated cellular modem. Total station now with Internet-connectivity!

    GT is fully networked with cellar modem and wireless LAN. This allows direct connectivity to MAGNET® Enterprise and provides you close connection between project site and office staff and managers.

    Highest quality in class
    Passes various environmental test with Topcon quality!

    Tough designed GT, passes impact, vibration, high-temperature, and humidity testing —provides  consistent performance at any harsh environments.

GT Total Station

Product Type Auto-tracking Model Auto-collimation Model
Model GT-1001 GT-501 GT-505
Auto-tracking / Auto-Collimating
Auto-tracking -(Option)-1
Motor type Direct drive by ultrasonic motor
Rotation speed / Auto-tracking speed 180°/s / 20°/s
Working range*2 ATP1/ATP1S 360° prism*3 : 2 to 600m (6.6 to 1,960ft.), Prism-5 mini prism : 1.3 to 500m (4.3 to 1,640ft.) OR1PA : 1.3 to 500m (4.3 to 1,640ft.) One AP prism : 1.3 to 1,000m (4.3 to 3,280 ft.) Reflective sheet (Auto-collimation)*4 : RS10/30/50N-K : 5 to 50m (16 to 160ft.) / RS90N-K : 10 to 50m (32 to 160ft.)
RC handle -(Option)-2
Remote control range (RC handle + RC-PR5) 2 to 300m (4.3 to 980ft.) 2 to 300m (4.3 to 980ft.)*1
Magnification / Resolving power 30x / 2.5"
Length : 142mm (5.6in.), Objective aperture : 38mm (1.5in.) (38mm (1.5in.) for EDM), Image: Erect, Field of view: 1°30' (26m/1,000m), Minimum focus: 1.3m (4.3ft.)
Angle measurement
Display resolutions 0.5"/1" (0.0001 / 0.0002gon, 0.002 / 0.005mil) 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" 1" 5"
Dual-axis compensator Dual-axis liquid tilt sensor, working range: ±6'
Distance measurement
Laser output*5 Reflectorless mode : Class 3R / Prism/sheet mode : Class 1
Measuring range (under average conditions*6)
Reflectorless*7 Under good conditions*8 : 0.3 to 1,000m Under good conditions*8 : 0.3 to 500m
Reflective sheet*9 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*10 CP01: 1.3 to 2,500m (4.3 to 8,200ft.), OR1PA: 1.3 to 500m (4.3 to 1,640ft.)
One AP prism*10 1.3 to 5,000m (4.3 to 16,400ft) / Under good conditions*8 : 6,000m (19,680ft.)
ATP1/ATP1S 360° prism 1.3 to 1,000m (4.3 to 3,280ft.)
Display resolution Fine : 0.0001 / 0.001m (0.001 / 0.01ft., 1/16 / 1/8in.) / Rapid : 0.001m / 0.01ft. / 1/8in. Tracking / Road :0.01m / 0.1ft. / 1/2in.
Accuracy*6*11(ISO 17123-4:2001)(D=measuring distance in mm)
Reflectorless*7 (2 + 2ppm x D) mm*12
Reflective sheet*9 (2 + 2ppm x D) mm
Prism*10 (1 + 2ppm x D) mm
Measuring time*8*13 Fine / Rapid / Tracking 0.9s (initial 1.5s) / 0.6s (initial 1.3s) / 0.4s (initial 1.3s)
OS, Interface and Data management
Operating system Windows Embedded Compact7
Control panel
Display 4.3 inch, Transmissive TFT VWGA color LCD with LED backlight, Touch screen,
Keyboard 24 keys with backlight
Location On single face
Data storage
Internal memory 1GB internal memory (includes memory for program files)
Plug-in memory device USB flash memory (max. 32GB)
Calendar / clock function Yes
Interface Serial RS-232C, USB2.0 (Type A / miniB)
Wireless communication
Celluler 2G/3G, User SIM: mini-SIM(2FF)(25 x 15 x 0.76mm)
Bluetooth Modern Bluetooth Class 1, Ver.2.1+EDR, Operating range: up to 600m (1,960ft.) (while in communication with RC-PR5)*14
Wireless LAN IEEE 802.11b/g/n
Guide light*15 Green LED (524nm) and Red LED (626nm), Operating range: 1.3 to 150m (4.3 to 490ft.)
Laser-pointer*15 Coaxial red laser using EDM beam
Graphic 6’ (Inner Circle)
Circular level (on tribrach) 10' / 2mm
Circular level (for main unit) 8' / 2mm (option)
Optical Magnification: 3x, Minimum focus: 0.5m (11.8in.) from tribrach bottom
Laser (option) Red laser diode (635nm±10nm), B eam accuracy: <=1.0mm@1.3m, Class 2 l aser product
Dust and water protection*16 / Operating temperature IP65 (IEC 60529:2001) / -20 to +50ºC (-4 to +122ºF)
Size with handle 212(W)x 172(D)x 355(H)mm
Instrument height 192.5mm from tribrach mounting surface
Weight with battery & tribrach Approx. 5.8kg (12.8lb)(with RC handle) Approx. 5.7kg (12.6lb)(with standard handle)
Power supply
Battery BDC70 detachable battery Li-ion rechargeable battery
Operating time (20ºC) BDC70 detachable battery Approx. 4hours*16

*1 Auto-Tracking function can be added by upgrading.

*2 Average conditions: Slight haze, visibility about 20km (12 miles), sunny periods, weak scintillation.

*3 Figures when both the elevation and depression angles of the laser beam are within 15º and the instrument is facing the ATP1/ATP1S 360º prism

*4 When using a reflective sheet for Auto Pointing, the size of sheet (10 to 90 mm) must be selected to correspond to the distance being measured. Use smaller reflective sheets for shorter distances. Figures when the Auto Pointing beam strikes within 15° of the reflective sheet target.

*5 IEC60825-1:Ed.3.0:2014 / FDA CDRH 21 CFR Part 1040.10 and 11

*6 Average conditions: Slight haze, visibility about 20km (12 miles), sunny periods, weak scintillation.

*7 With Kodak Gray Card White Side (90% reflective). When brightness on measured surface is 30,000 lx. or less. Reflectorless range/accuracy may vary according to measuring objects, observation situations and environmental conditions.

*8 Good conditions: No haze, visibility about 40km (25miles), overcast, no scintillation.

*9 When the measuring beam's incidence angle is within 30º in relation to the reflective sheet target.

*10 Face the prism toward the instrument during the measurement with the distance at 10m or less.

*12 Measuring range:0.66 to 200m

*13 Fastest time under good conditions, no compensation, EDM ALC at appropriate setting, slope distance.

*14 Usage approval of Bluetooth wireless technology varies according to country. Please consult your local office or representative in advance. No obstacles, few vehicles or sources of radio emissions/interference in the near vicinity of the instrument, no rain.

*15 The laser-pointer and the guide light do not work simultaneously.

*16 Figures will change depensing on the operating environment including temperatures and observation conditions.