The Leica Absolute Tracker AT901 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 3 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; or by tracking a Leica T-Scan, a contactless high-speed laser scanner. Which measurement method you should use will depend on your application.

From prototyping and reverse engineering to tooling inspection and part mating, from automotive to aerospace and everything in between, our customer list reads like a “who’s who” of the world’s most successful enterprises – yet our equipment is just at home in small and medium-size companies. With the introduction of the world’s first laser tracker in 1990, we revolutionized high-accuracy inspection as the world knew it. With the Leica Absolute Tracker AT901, we have done it again.


Leica Absolute Tracker 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, the Leica AT901-Basic is your tracker. Operating solely with a reflector, it is optimized for inspections within a typical measurement volume of up to 160 m (525 ft), and comes standard with our Leica Absolute Interferometer and PowerLock technologies.

Leica Absolute Tracker 901 – Mid Range

Since the introduction of the Leica T-Products in 2004, 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 hidden or sunken deep beneath surrounding sheetmetal, or because you need to reverse-engineer a part right there on the spot, the Leica AT901-MR is all you will need. When coupled to the Leica T-Scan, T-Probe, or T-Mac the Leica AT901-MR gives you a measurement volume of up to 18 m (59 ft). 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 (164 ft). The sensor is designed for large vehicle size objects and of course comes standard with our Leica Absolute Interferometer and PowerLock technologies.

Leica Absolute Tracker 901 – Long Range

This is the laser tracker that set the new benchmark for aerospace and other large scale precision measurements such as windmill blade inspection or industrial machinery alignment. It gives you hand-held wireless probing (Leica T-Probe), hand-held contactless scanning (Leica T-Scan), and full machine control abilities (Leica T-Mac) in a volume of up to 30 m (98 ft). Of course, it can also be used with a standard corner cube, in which case its typical measurement volume goes past 160 m (525 ft). This is the laser tracker that set new standards for usability with the Leica Absolute Interferometer and PowerLock, and continues to be the best selling 6DoF laser tracker in the world.

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PowerLock features:

For the first time in the history of laser trackers the laser beam shifts towards the user and not vice versa. – Combining the absolute measurement of ADM with the almost instantaneous update rate of the interferometer, the AIFM (absolute interferometer) stands out as the most precise, stable and technologically advanced measuring tool ever produced by Leica.


No need to wait for the tracker to block. Simply catch the beam to take measurements with no further delays. Whether you are using a reflector, Leica T-Probe, Leica T-Scan or the Leica T-Mac, the AIFM can instantly re-establish the broken laser beam and start measuring the moving target directly. – Robust Structure, extremely high thermal stability, smooth internal design and tracking sensor head that does not heat up.

Continuous operation

Continuous operation to perform in harsh industrial conditions, without having to make frequent compensation. the Leica Absolute Tracker AT901 simply requires calibration to ‘ year. – The portable CMM with 6 degrees of freedom is available as an optional.

The only technologically advanced portable CMM system

The only technologically advanced portable CMM system that can probe like a fixed CMM, scan like a laser scanner and perform tracking in automated applications: all in one system. – lightweight design and compact size weighting only 22 kg and a length of 62 cm.

Easy to carry and install

Easy to carry and install (one-man job), it fully complies with safety regulations, the entire system can be easily carried in a mid-size station wagon.

ADM/IFM with small diameter beam.

Benefit: You can use 0.5 ” reflectors throughout the measuring range.

Versatile installation.

Benefit: it can be installed vertically or horizontally, ensuring versatility in measurement volume. * ** * typical results within specifications. ** Cannot be used with the T-Cam in the horizontal position.

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