Description
Overview
The Topcon GT-603 Robotic Total Station is a reflectorless robotic total station designed for land surveyors, construction teams, and geospatial professionals who require 3″ angular accuracy and motorized operation in construction layout, topographic survey, and infrastructure measurement workflows. It supports reflectorless distance measurement up to 500 m, prism-based measurement with fine accuracy of 1 mm + 2 ppm, and runs MAGNET Field software pre-installed on a 4.3-inch color touchscreen. This Grade C unit from OMIWAA provides access to a functional Topcon GT-603 at a substantially lower cost than new, with calibration performed in 2025. Prospective buyers should review the product photographs carefully, as the screen presents a visible defect and one minor component shows physical damage, both documented prior to listing.
Technical Specifications
The following specifications are based on the Topcon GT-603 manufacturer datasheet and official product documentation.
Topcon GT-603 Specifications
- Angle accuracy: 3″ (0.0010 gon / 0.015 mil)
- Magnification: 30×
- EDM aperture: 38 mm — coaxial phase shift measuring system
- Signal source: Red laser diode 690 nm, Class 3R
- Reflectorless range: Up to 500 m (typical, Kodak White)
- Prism range (ATP1) — Fine: 1 mm + 2 ppm
- Prism range (ATP1) — Rapid: 5 mm + 2 ppm
- H/V circles: Rotary absolute encoder
- Measuring modes: H angle Right/Left — V angle Zenith / Horizontal / ±90° / % (selectable)
- Minimum display resolution: 1″ / 5″ (selectable)
- Display: 4.3-inch color touchscreen — Transmissive TFT WVGA, 9 brightness levels, resistive touch
- Guide light range: 1.3 to 150 m — visible angle ±4°
- Power: Li-ion battery BDC72
- Operating temperature: −20°C to +50°C
- Protection rating: IP65 (IEC 60529)
- Weight: 5.8 kg (with handle and battery)
- Software: MAGNET Field (pre-installed)
- Last calibration: 2025
Key Performance Parameters
- Angular accuracy of 3″ with rotary absolute encoder for H and V circle measurement — applicable to construction staking, control surveys, and topographic data capture
- Reflectorless EDM range up to 500 m (Kodak White) via 690 nm red laser for distance measurement without a prism in obstructed or inaccessible locations
- Prism-based fine distance accuracy of 1 mm + 2 ppm for high-precision infrastructure and as-built measurement workflows
- IP65 ingress protection and operating range from −20°C to +50°C for use in demanding outdoor field environments
Condition Report
This unit is graded C — Fair. It powers on normally and boots fully into MAGNET Field. During inspection, angular measurement, EDM, and motorized functions were observed to operate. The screen presents a visible defect, and one minor component shows physical damage — both are documented in the product photographs and should be reviewed before purchase. Cosmetic wear on the instrument body is consistent with professional field deployment. The unit was calibrated in 2025 per the supplied data. Accessory completeness not specified beyond the items listed below.
Included in the Box
- Topcon GT-603 Robotic Total Station (main unit)
- 1× rechargeable Li-ion battery BDC72
- MAGNET Field software (pre-installed on instrument)
Shipping & Returns
Free worldwide shipping.
Estimated total delivery: 4–12 business days. A 30-day return policy applies: if the item is not as described, OMIWAA will issue a full refund. Full return terms are available at omiwaa.com/refund-policy/ .
Why Buy From Omiwaa
OMIWAA physically receives, inspects, grades, photographs, and documents every unit before it is listed for sale. This Topcon GT-603 was handled directly by OMIWAA — it was not sourced through a broker, listed on consignment, or drop-shipped from a third party. OMIWAA owns and ships every item in its inventory, and condition grading — including the documented screen defect and component damage — is based on direct physical assessment, not seller-reported information.
Common Use Cases
The Topcon GT-603 is used across a range of professional surveying and construction applications requiring motorized total station operation with reflectorless and prism-based distance measurement.
- Construction layout and staking where 3″ angular accuracy and guide light support single-operator positioning across active job sites
- Topographic surveys and geospatial data capture requiring reflectorless EDM up to 500 m for measurement in areas where prism placement is impractical
- Infrastructure and utility measurement for as-built documentation and site control using MAGNET Field workflows
- Replacement or secondary instrument for survey crews requiring a field-functional robotic total station at reduced acquisition cost
