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Trimble AT360 Active Track Prism, for S, SPS, RTS series Robotic Total Stations
Trimble Active Track 360 target for Trimble S series robotic total stations is a high-precision active tracking prism with 2mm accuracy @ 200 meters. The AT360 is equipped with a built-in tilt sensor that provides an on-screen e-Bubble display (Access 2017 or newer). At 1.4 pounds, it's very light-weight (640 grams) and offers 12 hours of operation on a single battery. Standard Trimble target height: 135mm, +22mm prism constant.
The AT360 offers increased accuracy over the MT1000 but uses the DR mode for distance measurements, so distance depends on the DR mode of your instrument:
DR Plus range in normal conditions: 1640 feet (500m) DR HP range in normal conditions: 492 feet (100m)