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An Absolute Tracker from Leica Geosystems is a portable measurement system that relies on a laser beam to accurately measure and inspect in a spherical volume of up to 160 m [525 ft]. The Leica Absolute Tracker can gather 3D coordinates in 4 ways: by following a small mirrored sphere, also known as a reflector; by tracking a Leica T-Probe, a hand-held “Walk-Around” wireless contact probe; by tracking a Leica T-Scan, a contactless highspeed laser scanner; or by tracking a 6DOF device for automated applications such as with machines or robots. Which measurement method you should use will depend on your application.

Leica Absolute Tracker AT-901-Basic

– If your application requires positioning machines, fixtures or jigs, or if you are in the business of installing and aligning machine tools, roll mills, presses or gantry-based machines, AT-901-Basic is your tracker. Operating solely with a reflector, it is optimized for inspections within a measurement volume of up to 160 m.

Leica Absolute Tracker AT-901-Mid Range

– Since the introduction of the Leica T-Probe in 2004 and the Leica T-Scan a few months later, practically all leading automobile manufacturers have joined the ranks of our customers. When a reflector simply won’t cut it because there is no clear line of sight to the part you are trying to inspect, the part is hiden or sunken deep beneath surrounding sheetmetal, or because you need to reverse engineer a part right there on the spot, the AT-901-MR is all you will need.

When coupled to the Leica T-Probe and the Leica T-Scan, the AT-901-MR gives you a measurement volume of up to 18 m (59 ft). Use it with the Leica T-Probe to measure recesses and cavities with an astonishing precision. Couple it to the Leica T-Scan, Leica’s high-speed contactless scanner, and small and large objects as well as complex surfaces can be quickly digitized with minimal preparation times and regardless of the surface material. Of course, it can also be used with a standard corner cube, in which case its measurement volume goes up to a full 50 m (163 ft).

Leica Absolute Tracker AT-901-Long Range

– False modesty aside, this laser tracker is the new benchmark for aerospace and other general industry precision (GIP) large-scale applications such as windmill blade inspection or heavy industrial machinery alignment. It gives you hand-held wireless probing or hand-held contactless scanning volume of up to 30 m (98 ft). Of course, it can also be used with a standard corner cube, in which case its measurement volume goes up to a full 160 m (525 ft).

Its high-end specifications let you conduct demanding wireless inspections of very large parts with just one setup, with no need to reposition the laser tracker. With its unmatched robustness and reliability, repeatable accuracy and compact size that’s perfect for one-person operation, the AT-901-LR is the ideal GIP workhorse for those applications in which taking second guesses is absolutely not an option.