Product details
Topcon GM-55 Survey Station
Advanced Manual Total Station for High-Precision Surveying and Construction
The Topcon GM-55 Survey Station is a professional-grade manual total station engineered for surveyors, construction professionals, civil engineers, and infrastructure specialists who require reliable performance, high measurement accuracy, and durable field operation. Combining advanced EDM technology, rugged construction, long battery life, and intuitive onboard software, the GM-55 delivers exceptional productivity across a wide range of surveying applications.
Designed for demanding field conditions, the GM-55 offers fast prism and reflectorless measurements, precise angle accuracy, and superior environmental protection, making it an ideal instrument for modern construction layout, topographic surveys, and engineering projects.
Why Choose the Topcon GM-55 Survey Station?
The GM-55 is built to provide dependable measurement performance while maintaining ease of operation and excellent long-term reliability.
Main Advantages
- High-precision 5” angular accuracy
- Long-range reflectorless EDM
- Fast distance measurements
- Rugged waterproof design
- Long battery runtime
- Dual-axis compensation
- Large internal memory capacity
- USB data transfer support
- Bright backlit display
- Durable field-ready construction
Key Features of the Topcon GM-55
Advanced EDM Technology
Long-Range Reflectorless Measurements
The Topcon GM-55 is equipped with advanced EDM technology capable of fast and highly accurate measurements over long distances.
Distance Measurement Range
| Measurement Mode | Range |
|---|---|
| Reflectorless | Up to 500 m |
| Single Prism | Up to 4,000 m |
| Prism Sheet | Up to 500 m |
Distance Measurement Accuracy
| Mode | Accuracy |
|---|---|
| Prism Mode | ±(1.5 mm + 2 ppm) |
| Reflectorless Mode | ±(2 mm + 2 ppm) |
Measurement Time
| Mode | Time |
|---|---|
| Fine Measurement | Approximately 0.9 sec |
| Rapid Measurement | Approximately 0.7 sec |
| Tracking Measurement | Approximately 0.3 sec |
High-Precision Angle Measurement
Reliable Angular Accuracy
The GM-55 delivers precise angular measurements suitable for professional surveying and engineering applications.
| Feature | Specification |
|---|---|
| Angular Accuracy | 5” |
| Angle Measurement System | Absolute Encoder |
| Minimum Reading | 1” / 5” Selectable |
| Dual Display | Available |
| Compensation System | Dual-Axis |
Rugged Field Durability
Built for Harsh Jobsite Conditions
The Topcon GM-55 is engineered for reliable operation in challenging outdoor environments.
Environmental Protection
| Feature | Specification |
|---|---|
| Protection Rating | IP66 |
| Dust Resistance | Fully Protected |
| Water Resistance | Waterproof |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -30°C to +70°C |
Technical Specifications
Telescope Specifications
| Feature | Specification |
|---|---|
| Telescope Magnification | 30x |
| Objective Aperture | 45 mm |
| Resolving Power | 2.5” |
| Field of View | 1°30’ |
| Minimum Focus Distance | 1.3 m |
| Image | Erect |
Compensator Specifications
Automatic Tilt Correction
| Feature | Specification |
|---|---|
| Compensator Type | Dual-Axis Liquid Tilt Sensor |
| Compensation Range | ±6’ |
| Compensation Accuracy | 1” |
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