Topcon GT-1502 Robotic Total Station

The Best-Selling GT-1500 Robotic Total Station

The GT-1502 hits the sweet spot of the Topcon GT series. Two-second angular accuracy covers boundary surveys, control work, and construction layout without stepping up to the GT-1501 price point. Combined with the GT-1500 platform's 200-degree-per-second BLDC motors and 5,000-meter prism range, the GT-1502 gives licensed surveyors and GC layout teams a single instrument that handles both ends of their work without compromise.

Key Features

• Brushless Direct Current Motors: 200-degree-per-second rotation and 20-degree-per-second auto tracking from intelligent BLDC motors. Smoother, quieter, and longer-lasting than traditional servo or ultrasonic designs.
• 2-Second Angular Accuracy: The most common survey-grade accuracy tier. Covers boundary surveys, site control, topographic mapping, and high-precision construction layout.
• UltraTrac Prism Tracking: Maintains rock-solid prism lock at ranges up to 1,000 meters, even in high-vibration environments and busy jobsites.
• 5,000-Meter Prism Range: Extended range for long-shot survey work, large-site control, and any project where distance matters.
• 1,000-Meter Reflectorless EDM: Measure difficult targets without placing a prism. Ideal for as-built verification, facade documentation, and hard-to-reach surfaces.
• Hybrid Positioning Ready: Pair with a Topcon GNSS receiver for seamless switching between robotic and GNSS measurement. Work under tree cover, around obstructions, or wherever line of sight breaks down.
• RC-5A Remote Compatibility: Reacquire your prism in seconds with single-tap acquisition from up to 300 meters away.
• LongLink Bluetooth: 600-meter communication range with RC-5A in open conditions.
• Rugged IP65 Rating: Fully dust- and waterproof construction. Operates in temperatures from -20°C to 50°C.

The Right Balance for Working Surveyors

Two-second angular accuracy is the workhorse standard of the survey industry. It handles ALTA/NSPS land title surveys, boundary work, topographic mapping, and construction layout with room to spare. The GT-1502 pairs that accuracy with the same fast motors, extended range, and 1 mm distance accuracy as the GT-1501. If your work crosses the boundary between survey and construction, this is the instrument that covers both without asking you to compromise. Switch between one-person robotic and two-person operation without changing software. Export directly to Topcon Field, Topcon Digital Layout, or Pocket3D.

Technical Specifications

• Angular Accuracy: 2" (0.0006 gon / 0.010 mil)
• Angle Display: 0.5" / 1" selectable
• Prism Range: 1.3 to 5,000 m (16,400 ft)
• Reflectorless Range: 0.3 to 1,000 m (3,280 ft)
• Distance Accuracy (Fine): 1 mm + 2 ppm
• Measuring Time: Fine 0.9s / Rapid 0.6s / Tracking 0.4s
• Max Rotation Speed: 200°/sec
• Max Auto Tracking Speed: 20°/sec
• UltraTrac Tracking Range: 1.3 to 1,000 m
• Motor Type: Brushless Direct Current (BLDC)
• Operating System: Windows Embedded Compact 7
• Display: 4.3" TFT VWGA color touchscreen
• Communications: Bluetooth Class 1 (600 m with RC-5A), USB 2.0, RS-232C
• Battery Life: Approximately 4 hours per BDC72 battery
• Environmental: IP65 dust and water resistant, -20°C to 50°C operating temperature
• Weight: 5.9 kg (normal handle) / 6.0 kg (RC handle)

Standard Kit Includes:

• GT-1502 Total Station
• 2x BDC72 rechargeable lithium-ion batteries
• CDC77 dual battery charger
• Rugged hard carrying case
• Lens cap and tool kit
• Calibration certificate

Industry-Leading Warranty:

• 3-Year Instrument Warranty
• 5-Year UltraSonic Motor Warranty

Common Questions About the GT-1502

What is the angular accuracy of the Topcon GT-1502?
The GT-1502 has 2-second (2") angular accuracy. At 100 feet, that translates to less than 1/16 inch of horizontal offset, suitable for boundary surveys, construction layout, site control, and topographic mapping.

What is the difference between the GT-1502 and the GT-702?
Both have 2-second angular accuracy, but they use different platforms. The GT-1502 has 200°/sec motors, 5,000 m prism range, and 1 mm fine distance accuracy. The GT-702 has 120°/sec motors, 4,500 m prism range, and 2 mm fine distance accuracy. Choose the GT-1502 for survey work or long-range layout. Choose the GT-702 for construction layout at a lower price point.

Does the GT-1502 work with one-person operation?
Yes. The GT-1502 is a robotic total station designed for single-operator workflows. Pair it with a field controller and the RC-5A remote for complete one-person layout and survey capability.

Is the GT-1502 compatible with Hybrid Positioning?
Yes. Pair the GT-1502 with any Topcon GNSS receiver to create a Hybrid Positioning system. Switch between robotic total station and GNSS measurement within the same field software.