TOPCON Total Station GM-52

The GM-50 Series is the perfect entry-level site layout and survey tool offering reliability and flexibility without sacrificing cost or functionality.

The sleek design is built tough, with a water and dustproof IP66 rating, integrated Bluetooth® capability and an internal antenna, enabling you to deliver measurements cable-free to your data controller, streamlining your equipment weight and workflow.

The GM-50 is also armed with a top line EDM, generous internal memory storage, and SDRbasic on-board software so you have everything you need to get the job done out in the field.

advanced design with superior technology

The GM-50 Series was designed from the ground up to deliver the very latest technological advantages, all in a small, sleek design – you’ll appreciate the advantages from the very first measurement.

Featuring a class leading EDM unit, the GM-50 is able to measure up to 4,000 m at 1.5 mm + 2 ppm accuracy, to standard prisms, and can measure in reflectorless mode up to 500 m at an incredible 2 mm + 2 ppm accuracy.

Measurements are captured faster than ever, and with a beam width of 13 mm (at 30 m), the bright red laser dot
pinpoints features with ease.

Versatile, Economical Solution

The GM-50 Series is smaller, lighter, with increased storage capacity. Offered at an even more cost-efficient option than
previous models, it provides your customers the perfect tool for entry-level site layout and surveying.

Bluetooth® Communication

With integrated Bluetooth® capability and internal antenna, the sleek design enables you to deliver measurements
cable-free to your data controller.

Tested for toughness

We perform the tough environmental tests to ensure long-term operation even under the rough site environments. GM 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. 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 Series product quality.

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Additional information

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

Accuracy (ISO 17123-3:2001)

2"

Dual-axis compensator

Dual-axis liquid tilt sensor, working range: ±6'

Collimation compensation

On/Off (selectable)

Laser output*1

Reflectorless mode : Class 3R / Prism/sheet mode : Class 1

Measuring range Reflectorless*3

0.3 to 500m (1,640ft.)

(under average conditions*2) 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 / Rapid : 0.0001m (0.001ft. / 1/16 in.)
0.001m (0.005ft. / 1/8 in.) (selectable)

Tracking / Road : 0.001m (0.005ft. / 1/8 in.)
0.01m (0.02ft. / 1/2 in.) (selectable)

Accuracy*2 Reflectorless*3

(2 + 2ppm x D) mm*6

(ISO 17123-4:2001) Reflective sheet*4*5

(2 + 2ppm x D) mm

(D=measuring distance in mm) Prism*7

(1.5 + 2ppm x D) mm

Measuring time*8 Fine

0.9s (initial 1.5s)

Measuring time*8 Rapid

0.6s (initial 1.3s)

Measuring time*8 Tracking

0.4s (initial 1.3s)

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

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)

Instrument height

192.5mm from tribrach mounting surface

Weight with battery & tribrach

Approx. 5.1kg (11.3lb)

Battery

Li-ion rechargeable battery BDC71

Operating time (20ºC)*9

Approx. 14hours*10

On board

• REM Measurement
• 3D Coordinate Measurement
• Resection
• Stake Out
• Topography Observation
•  Offset Measurement
• Missing Line Measurement
• Intersection
• Surface Area Calculation
• Route Surveying
• Point to Line