The Trimble® AG GCS900 Grade Control System with dual GPS can be installed on excavators with standard buckets or tilt buckets for mass excavation projects. The system uses two GPS receivers and solid state angle sensors to measure the precise 3D position of the tip of the bucket.

The Trimble dual GPS antenna configuration computes the exact position and orientation of the machine blade or bucket for faster excavation without stakes. With accurate, 3D positioning of the bucket, the system guides the operator to quickly perform complex tasks and simplifies finishing slopes.

Using the system on excavators with tilt buckets allows for shaping V-ditches and operations where the excavator is digging a slope that is not perpendicular to the boom.

The rugged AS450 angle sensors have no moving parts, and has an optional submergible sensor kit which can be submerged in up to 20 meters (66 feet) of water making the GCS900 for excavators ideal for underwater excavation applications. GPS-based Grade Control Systems are ideal for larger site projects and long-term, multi-phase projects.


The on-board Trimble CB460 computer determines the position of each tip of the blade or bucket and compares these positions to a design elevation. This combined with the in-cab mounted lightbars show the operator what bucket movement is required to get to grade so excavation is faster than ever-even with complex designs.

Using the Trimble AG GCS900 with dual GPS on an excavator allows contractors to significantly improve their productivity and profitability.

     • Roads and highways – rough grading

     • Large earthmoving projects – dams, reclamation, etc.
     • Landfills and waste deposits
     • Commercial site prep – complex design
     • Underground utilities
     • Dredging
     • Break water construction

Features and Benefits:
     • Significant cost saving

     • Less time to completion
     • Less rework
     • No waiting for stakes to be set
     • More accurate, more consistent excavation
     • Perform more complex excavation


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