Topcon GM 55 5 Second Reflectorless Total Station

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

The Topcon GM-50 Series Total Stations offer cutting-edge surveying technology in a sleek, compact design. Built from the ground up for precision and efficiency, the GM-50 series is perfect for entry-level site layout, construction, and professional surveying projects. From the first measurement, users will notice the speed, accuracy, and ease-of-use advantages.

Overview of the Topcon GM-50 Series

The GM-50 Series is designed for high-performance measurement while remaining lightweight and portable. Featuring a class-leading EDM (Electronic Distance Measurement) unit, the GM-50 can measure up to 4,000 m with prisms at 1.5 mm + 2 ppm accuracy, and up to 500 m reflectorless at 2 mm + 2 ppm accuracy. Its precise beam width of 13 mm at 30 m ensures accurate targeting and fast data capture.

With enhanced storage, Bluetooth® connectivity, and ergonomic design, the GM-50 provides an economical yet technologically advanced solution for modern surveyors.

Key Features of the GM-50 Series

High Accuracy and Fast Measurement

• Prism measurement range up to 4,000 m

• Reflectorless measurement up to 500 m

• High-speed measurement: Fine 0.9 sec, Rapid 0.6 sec, Tracking 0.4 sec

• Beam width: 13 mm at 30 m for precise feature targeting

Versatile and Cost-Efficient

• Lightweight and compact design

• Increased storage capacity via USB 2.0 (supports up to 32 GB)

• Perfect for entry-level surveying and site layout

Advanced Communication

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

• USB 2.0 and RS-232C serial connectivity

• Cable-free data transfer to controllers

Precision and Stability

• Accuracy: 5 seconds, with 2”/5” angular resolution

• Dual-axis compensation (±6°)

• Independent Angle Calibration System (IACS)

• Magnification: 30x, Resolving power: 2.5″

• Coaxial red laser pointer for accurate targeting

User-Friendly Interface

• Graphic backlit LCD display

• 28-key alphanumeric keyboard

• Single or dual display options

• Optional optical or laser plummet

Rugged and Reliable Design

• Magnesium-alloy housing with IP66 dustproof and waterjet protection

• Tangent lock for secure angle positioning

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

• Operating temperature: -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 mm + 2 ppm

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

Communication

• Bluetooth Class 1.5, operating range up to 10 m

• USB 2.0 port supporting up to 32 GB

• Serial RS-232C

General Specifications

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

• Keyboard: 28-key alphanumeric with backlight

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

• Dust/Water Rating: IP66

• Operating Temp: -20ºC to 60ºC

Package Includes

• Topcon GM-55 5″ Total Station

• BDC71 Li-Ion Battery

• CDC77 Battery Charger with Cable

• Tripod

• Hexagonal Wrenches, Screwdriver, Lens Brush

• Lens Hood and Tool Bag

• Silica Gel and Silicon Cloth

• Laser Caution Sign Board

• Quick Manual, Full Manual, Registration Card (2YR)

• Carrying Case

Warranty: 3 Years

Benefits of the Topcon GM-50 Series

• Fast and Accurate Measurements: Reliable prism and reflectorless EDM for all applications

• Portable and User-Friendly: Lightweight design and intuitive interface reduce fatigue

• Durable Construction: IP66-rated housing protects against dust and water

• Flexible Workflows: Bluetooth® connectivity and USB storage for seamless data management

Applications

• Construction layout: Foundations, utilities, and structural alignment

• Topographic surveys: Land mapping and feature capture

• Engineering projects: Roads, bridges, tunnels, and infrastructure

• Entry-level surveying: Cost-efficient, accurate tool for small and medium-scale sites