Reflectorless Total Station GM-50

Reflectorless Total Stations

• Fast and accurate new EDM
• Bluetooth® communications (optional)
• Advanced angle accuracy
• Long battery life – 14 hours
• Rugged, waterproof design with IP66 rating
• 500 m long-range reflectorless measurement
• 50,000 point internal memory

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Angle Measurement

Min. Resolution/Accuracy 2”/5”
Min. Display 1”/5” (0.0002 / 0.001gon, 0.005 / 0.02 mil)
Dual-axis compensator Dual-axis liquid tilt sensor, working range: ±6’
Collimation compensation On/Off (selectable)

Distance Measurement

Prism EDM Range 4,000 m
Prism EDM Accuracy 1.5 mm + 2 ppm
Non-Prism Range 500 m
Non-Prism Accuracy 2.0 mm + 2 ppm (0.2 – 200 m)
Measuring Time Fine: 0.9 sec
Rapid: 0.6 sec
Tracking: 0.4 sec


Bluetooth Class 1.5, Operating range: up to 10m
USB flash memory Max. 32GB
Serial RS-232C, USB2.0 Type A for USB flash memory


Display Graphic LCD, 192 x 80 dots, backlight: on/off (Selectable) / Alphanumeric keyboard / 28 keys with backlight
Battery Operation Up to 14 hours
Dust/Water Rating IP66
Operating Temp -20ºC to 60ºC*


Topcon GM-50 Series total stations – 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.

Ultra-powerful, advanced EDM

• 500 m non-prism range
• 4,000 m prism range
• Coaxial red laser pointer
• Pinpoint, precise beamspot

Advanced angle encoder system

• 2” or 5” angle accuracy
• Incorporates exclusive IACS
(Independent Angle Calibration System)
on 2” and 5” models

Rugged, waterproof design

• Waterproof/dustproof IP66 design
handles the toughest environments
• Magnesium-alloy housing providing
stable angle accuracy
• Graphic display and alphanumeric key
board (standard)

Easy access USB 2.0 memory

• Up to 32GB storage
• Environmentally protected
• Compatible with industry standard
thumb drives