Grade Control Systems

Innovative Grade Control Systems for Cat® Equipment

Cat AccuGrade™ systems are offered as a dealer-installed option for most machine families in your earthmoving fleet. Most machine models are available from the factory with the integrated AccuGrade-Ready option for quick, easy installation.

AccuGrade systems are scalable and come in a wide range of technology configurations to meet every job requirement, including: Cross Slope, Sonic, Laser, GPS, and Universal Total Station.



The AccuGrade® Laser Grade Control System allows dozer operators to grade and fill with high accuracy and without traditional stakes or grade checkers. Using advanced laser technology, machine-mounted components and an off-board laser transmitter, this state-of-the-art machine control system provides precise elevation information on an in-cab display to achieve accurate blade positioning. As a result, operators can improve their efficiency and get to grade faster and in fewer passes than ever before.

The AccuGrade System can significantly improve the productivity and accuracy of grading equipment – by as much as 50% over conventional methods. Used primarily for finishing grading, the system is easy to learn. With minimal training, even inexperienced operators are able to get up to speed in no time at all.

Field-proven and versatile, the dual laser system is ideal for fine grading of sites with flat, single or dual slope surfaces, such as industrial, commercial and residential building sites.

Typical applications of laser grade control systems include:


  • Flatwork
  • Building pads
  • Sports fields
  • Airport runways, taxiways and aprons
  • Parking lots
  • Landfill construction, lifts and capping
  • Railroad roadbeds
  • Agriculture waterways
  • Agriculture terraces
  • Ponds
  • Roads and highways with uniform slope

Site Preparation

  • Commercial
  • Industrial
  • Residential

ACCUGRADE GPS Grade Control System


Current earthmoving and fine grading processes are labor intensive and dependent on manpower and instruments. Maintaining consistent grade between stakes is challenging, even for experienced operators.

The “Global Positioning System” that we know as GPS uses 24 satellites orbiting the earth to pinpoint specific locations on earth. Thanks to the latest technology, we are now able to harness the power of GPS to operate our grade control equipment! AccuGrade GPS reduces labor requirements and helps operators work to the design plan by accurately cutting, filling, and reducing material cost.

The AccuGrade GPS control system is the best solution when the construction site involves contours, rather than single or dual slope planes. The AccuGrade 3D system uses GPS technology to compare the blade position to a three-dimensional computerized site plan and signals the operator or hydraulic system to raise or lower the blade to achieve the design requirements.

Advanced GPS technology solutions move the design plan to the cab for greater operator control, increased accuracy, higher productivity and lower operating costs.

The AccuGrade GPS Grade Control System is a high technology machine control and guidance system that allows dozer operators to grade with increased accuracy, without the need for survey stakes. Digital design data, in-cab operator guidance features and automatic blade controls help the operator achieve grade faster, meaning higher productivity, lower operating costs, and greater profitability.

AccuGrade GPS is designed for a wide range of construction earthwork applications, from bulk clearing with high production rates to finish grading with tight tolerances.

Flat, single and dual sloping planar designs, such as building pads, parking lots, roads and highways, can be created on-board the machine using the AccuGrade GPS system. Complex 3D designs, such as golf courses and roads with super elevations, can be created in the office by design engineers and loaded onto the system via a USB drive.

Advanced Grade-and-Fill Tools:

Increases Productivity and Efficiency

  • Increases productivity by up to 50%
  • Reduces guesswork and costly rework by moving dirt right the first time
  • Reduces survey costs up to 90%
  • Increases material utilization
  • Reduces operating costs
  • Extends the work day

Assists with Labor Shortage

  • Reduces labor requirements and costs
  • Customers can get the job done quicker
  • Reduces need for staking, string lines and grade checkers
  • Empowers operator to check grade from the cab
  • Reduces labor for staking as job progresses

Improves Employee Satisfaction and Retention

  • In-cab display brings the design to the cab
  • Provides more responsibility and job satisfaction
  • Empowers operator with real-time results
  • Real time feedback on progress increases job satisfaction, eliminates guesswork and reduces operator stress
  • Improves operator skills and takes performance to the next level
  • Investing in the operator provides value and trust by investing in latest technology



AccuGrade® Sonic is a grade control system designed to control surface elevation. The sonic system uses an ultrasonic sensor to maintain the blade at the same relative vertical distance to an external reference, such as a string line or curb and gutter.

These innovative grade-and-fill tools allow operators of all experience levels to perform with greater precision. The system makes automatic elevation adjustments typically performed by the operator when in cross slope only control. The operator simply steers the machine to maintain the sensor over the external reference.

Cat Accugrade Systems can be configured to your particular applications and project requirements. Systems can be installed to provide the following two earthmoving tools:

Single Sonic System. When combined with AccuGrade Cross Slope, the single grade control system provides automatic blade adjustments to one side of the blade for automatic control of elevation and cross slope.

Dual Sonic System. When two sonic sensors are used, the system provides automatic elevation control to either side of the blade. The system typically uses only one sensor at a time. This allows the operator to control which side of the blade to control and change direction without relocating sensors.



AccuGrade Cross Slope is a grade control system designed to control surface cross slope. Machine-mounted sensors are used to calculate necessary blade slope positioning to achieve desired cross slope of the surface. The system makes automatic adjustments to the left or right lift cylinder, typically performed by the operator. AccuGrade Cross Slope delivers all the information the operator needs to quickly and easily spread or cut material at the correct cross slope to the in-cab display. The operator can select which side of the blade to control automatically and swap direction on the return pass without readjusting the settings. Elevation is controlled manually by matching grade, or automatically by adding an elevation control device.

Your options in grade-and-tool systems include:

Cross Slope System. The basic cross slope system automatically controls the slope of the blade to maintain desired surface cross slope.

Cross Slope with Elevation Control. AccuGrade Cross Slope can be combined with one or more of the AccuGrade elevation control technologies, such as AccuGrade Sonic, AccuGrade Laser, AccuGrade GPS, or AccuGrade ATS for automatic control of elevation and cross slope.



AccuGrade UTS is a high accuracy dynamic tracking system that uses an MT900 UTS target to track a machine and monitor blade positioning. A Universal Total Station (UTS) instrument on the work site is used to track the target, which is mounted on the blade of the machine, to determine precise 3D positioning.

Active target technology allows the system to reliably lock onto and track the intended target. This ensures the correct machine is being tracked and eliminates false lock-ons to other active machine targets, survey crews, or reflective surfaces. Built-in search intelligence allows the system to quickly search for and find the target when the lock is lost due to a passing vehicle or other interruption.

The UTS instrument continuously measures the target’s position and transmits real-time positioning data to the operator via the in-cab display, which shows the exact position of the blade in relation to the design. The system combines the position of the target with the known position of the instrument, machine measurements and sensor outputs to calculate precise positioning of the blade tips. The system uses the positioning data to calculate the desired elevation and cross slope. Cut and fill values are computed by comparing the position of the blade with the design file. The system makes automatic blade adjustments typically performed by the operator and provides automatic blade control to one or both cutting edge tips.

AccuGrade UTS puts the information the operator needs to complete the job in the cab. The operator simply steers the machine to achieve fine grade surfaces with high-precision accuracy.

Your Source for Cat Accugrade System Technology

As the authorized Cat dealer for the region, Riggs CAT provides the latest technological solutions developed by the worldwide leader in construction equipment. We are the exclusive source of new Cat equipment with Accugrade grade control systems installed. Our experienced team will work with you to identify the grade-and-fill tools capable of positively impacting your bottom line.
When you partner with us, you benefit from:

• Exceptional product knowledge and customer care.
• Superior service capabilities in our shop or the field.
• Eight locations to serve you throughout Arkansas.
• Ongoing support from your local Cat dealer.

Riggs CAT has been providing cutting edge equipment and technology to industries throughout Arkansas since 1927. Contact us today to request assistance from a representative. We’ll be happy to answer all your questions about Cat Accugrade Systems and provide a free, competitive quote.