Topcon GM-50 Series Total Stations – Advanced Design with Superior Technology

The Topcon GM-50 Series represents a leap in surveying technology, combining precision, speed, and portability in a sleek, lightweight design. Designed from the ground up, the GM-50 delivers superior performance and advanced features, making it ideal for professional surveyors and entry-level site layout applications alike.

Overview of the Topcon GM-50 Series

The GM-50 Series total stations offer fast, accurate measurements and versatile operation. Featuring a class-leading EDM (Electronic Distance Measurement) unit, these instruments provide long-range prism and reflectorless measurement capabilities while maintaining reliability and ease of use. With integrated Bluetooth® communication and modern ergonomics, survey data can be transmitted wirelessly for efficient workflow management.

Key Features of the GM-50 Series

High-Precision Measurement

• Prism range up to 4,000 m with 1.5 mm + 2 ppm accuracy.

• Reflectorless mode up to 500 m with 2 mm + 2 ppm accuracy.

• Fast measurement capture with a 13 mm beam width at 30 m.

Versatile and Cost-Effective

• Smaller and lighter than previous models.

• Increased storage capacity and extended battery life.

• Perfect entry-level solution for site layout and surveying tasks.

Advanced Communication

• Integrated Bluetooth® Class 1.5, operating range up to 10 m.

• USB 2.0 port supports up to 32 GB storage.

• Cable-free data transfer to controllers for efficient fieldwork.

Display and Control

• Graphic backlit LCD display with 28-key alphanumeric keyboard.

• Single or dual display options.

• Optional optical or laser plummet for flexible targeting.

Precision and Stability

• Accuracy options: 2 seconds.

• Dual-axis compensation with ±6° working range.

• Independent Angle Calibration System (IACS) for enhanced angular accuracy.

• Magnification: 30x with 2.5″ resolving power.

Robust Design

• Magnesium-alloy housing with IP66 dustproof and waterjet protection.

• Li-ion rechargeable battery with up to 14 hours of operation.

• Operating temperature range: -20ºC to 60ºC.

Technical Specifications

Angle Measurement

• Min. Resolution/Accuracy: 2″ / 5″

• Min. Display: 1″ / 5″ (0.0002 / 0.001 gon, 0.005 / 0.02 mil)

• Dual-axis compensator: Liquid tilt sensor, working range ±6′

• Collimation compensation: Selectable On/Off

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

• Measuring Time: Fine 0.9 sec, Rapid 0.6 sec, Tracking 0.4 sec

Communication & Connectivity

• Bluetooth Class 1.5 (range up to 10 m)

• USB 2.0 port supporting up to 32 GB storage

• Serial RS-232C for wired connections

General

• Display: Graphic LCD 192 x 80 dots, backlight on/off selectable

• Battery: Li-ion rechargeable, up to 14 hours

• Dust/Water Rating: IP66

• Operating Temperature: -20ºC to 60ºC

Included Package

• Topcon GM-52 2″ Total Station

• BDC71 Li-Ion Battery

• CDC77 Battery charger with cable

• Hexagonal wrenches and screwdriver

• Lens brush and lens hood

• Tool bag and carrying case

• Silica gel and silicon cloth

• Laser caution sign board

• Quick manual, full manual, and registration card (2YR)

Warranty: 3 Years

Benefits of the Topcon GM-50 Series

Fast and Accurate Measurements

The GM-50’s EDM and reflectorless measurement capabilities provide rapid, reliable data collection for all surveying tasks.

Portable and User-Friendly

Its compact, lightweight design and ergonomic controls reduce operator fatigue while maintaining high precision.

Durable and Weather-Resistant

IP66 rating and magnesium-alloy housing ensure dependable performance in harsh field environments.

Flexible Workflow

Bluetooth® connectivity and USB storage allow seamless data transfer, simplifying survey project management.

Applications

• Construction Layout: Foundations, utilities, and structural alignment.

• Topographic Surveys: Land mapping and feature capture.

• Engineering Projects: Roads, bridges, tunnels, and infrastructure planning.

• Entry-Level Surveying: Efficient and affordable tool for smaller sites.