Locked and loaded with the most powerful EDM in the industry, the GPT-3500 from Topcon is engineered to impress. Backed by our renowned history in laser technology development, the GPT-3500 is rock-solid in rugged environments. Achieve the performance you've dreamed of, with rugged design and Topcon driven software in the GPT-3500. Our powerful EDM allows you to stay focused and acquire data quickly and safely.