Excellent Solution For Surveying
GM-50K Series

GM-50K Series

GM-50K Series Geodetic Measurement Station

High Quality, High Return!

  • Construction and Survey Application Software
  • Fast & Accurate & Powerful Measuring Distance Feature
  • 500m Long Range Reflectoress Measurement
  • Rugged & Waterproof Design
  • Reliable Large Volume Internal Memory


Fast and Powerful Reflectorless EDM
• Fast and accurate pinpointing with phase shift technology.
• Fast distance measurement of 0.9s regardless of object.
• Minimum reflectorless measuring distance – just 30cm.
• Improved collimation with super-bright pointer.
• Smaller EDM beam spot size for minimal distance measuring error.
• Dependable measuring even at shallow incidence angles.
• Ensures accurate reflective sheet distance measurement.

Japan Quality Products
We perform the tough environmental tests to ensure long-term operation even under the rough site environments. GM-K Series total stations are thoroughly inspected with dust-proof and water-proof test chambers. In addition, the 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 GM-K Series product quality.

Model GM-52K GM-55K
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 1”/5” (0.0002 / 0.001gon, 0.005 / 0.02mil)
Accuracy (ISO 17123-3:2001) 2″ 5″
Dual-axis compensator / Dual-axis liquid tilt sensor, working range: ±6′
Collimation compensation On/Off (selectable)
Distance measurement
Laser output*1 Reflectorless mode : Class 3R / Prism/sheet mode : Class 1
Measuring range (under average conditions*2) Reflectorless*3 0.3 to 500m (1,640ft.)
Reflective sheet*4*5 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 4,000m (4.3 to 13,320ft)
Minimum Display Fine / Coarse : 0.0001m (0.001ft. / 1/8 in.) / 0.001m (0.005ft. / 1/8 in.) (selectable), Coarse : 0.001m (0.005ft. / 1/8 in.) / 0.01m (0.02ft. / 1 in.) (selectable) Tracking / Road : 0.01m (0.02ft. / 1 in.)
(ISO 17123-4:2001)
(D=measuring distance in mm)
Reflectorless*3 (2 + 2ppm x D) mm*6
Reflective sheet*4*5 (2 + 2ppm x D) mm
Prism*7 (1.5 + 2ppm x D) mm
measuring time*8 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 : on/off (Selectable) /Alphanumeric keyboard / 28 keys with backlight
Control panel location On both faces On single face
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)
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 (On both faces) 183(W)x 174(D)x 348(H)mm (On single face)
Instrument height 192.5mm from tribrach mounting surface
Weight with battery & tribrach Approx. 5.1kg (11.3lb)
Power supply
Battery Li-ion rechargeable battery BDC46C
Operating time (20ºC)*9 Approx. 14hours*10
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-50K Series Brochure


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