2D Paving P-32+

Topcon is proud to announce the new improvements to our 2D Paving product range. P-32 has been brought to a new level with the brand new ST-3 Sonic Tracker, new Re-designed Slope Sensor and updated the GC-35 with new Firmware 2.0.

Features and Benefits

  • Extreme environmental specifications
  • Large full-color display
  • Dual control with one control box
  • Includes casted carrying case
  • Advanced Digital Signal Processing

GC-35 Paver System Control Box

  • Waterproof and IP67 rated
  • Backward compatible with System Five pavers
  • Superior design with side mount connectors
  • Faster processor and easy Performance
  • Menu access
  • Able to operate both sides from one control box


ST-3 (Sonic Tracker 3):

  • Multiple Transducers
  • Routine Transducer Replacement Not Required
  • Environmental Specs IP67
  • Position indication on stringline
  • Wide range linear detection on stringline
  • Works better in tight areas


Slope Sensor

  • Increased accuracy over extended temperature range
  • Insensitive to vibration
  • Additional CAN bus communication


ST-3 Sonic Tracker:

Utilizing multiple transducers, the ST-3 will show the horizontal offset on a stringline, while updating the control box with accurate elevation information over the whole detection range.

Its eliptical detection zone combined with the twice as fast pulsing transducers will provide a smoother and more predictable reaction to the detected surface. Smooth and fast goes hand-in-hand.

With the narrow detection zone, it can detect the target you aim for in very tight situations, without the need to lower the sensor.

Re-designed Slope Sensor:

Our new Re-designed slope sensor gives you the accuracy you are used to, but now under even more extreme circumstances. With the amazing stability under vibration conditions and solid operation in an extended temperature range, this sensor will add quality to the job. The additional CAN bus interface gives the GC-35 control box the cross slope value at all times.

GC-35 Firmware 2.0:

The new Firmware that comes with the P-32 / P-32+ system gives you several benefits. By checking “Display Slope” in the Display Option of the performance menu, the Cross Slope sensor value will be displayed even when the control box is set in Elevation Control on both sides. So no more guessing, just KNOW that the cross slope is correct, all the time.

The new Block Slope Calibration menu option, protects you from accidently re-calibrating the slope sensor. Another step in improving the quality of the job.

The setting for selecting the slope resolution has moved to the Performance menu for easier access, so that Cross slope transition will be smoother as you change the Cross Slope Setpoint on the fly.

Extreme Environmental Specifications

The components are rated IP-67 to work in all harsh environments.  The USB connector to the control box makes for quick and easy firmware upgrades and will allow the user to stay up-to-date as future development occurs.

Dual Operation with One Control Box

A highly sought after feature is added and now available with the P-32 paving system, being able to operate both sides of the machine with one control box.  No longer will 2D paving require separate control boxes for each side if the machine!

2D Paving System Options

Upgradeable to 3D with mmGPS

The next generation of asphalt paver control – and Smoothtrac® – are fully upgradeable. mmGPS – from the innovators in asphalt paver automation!

Imagine controlling your paver right from digital site plans. As you pave you’re producing exact thickness at exact slope automatically. No following stringlines, curbs, or other surface references.

At the heart of Millimeter GPS™ is Topcon’s Lazer Zone™ technology. This revolutionary technology brings together the simplicity of a rotating laser, the accuracy of a robotic total station, and the flexibility and multiple user capabilities of GPS into one complete jobsite solution! Topcon combines this revolutionary new transmitter with the PZS-MC receiver and Topcon’s GX-60 Control Box and slope sensor to create a system that’s changing the face of paver automation.

Knowing where the paver is located within the digital site plan, and knowing the grade required at that exact position, the control box sends correction signals to the screed to precisely maintain mat thickness and slope for that position on the site. And mmGPS is fast, continuously updating position and grade information so you work as fast as you want.

Sonic Averaging System (SAS)

Topcon’s Sonic Averaging System has been the paving industry’s first choice as a non-contacting replacement to the conventional mechanical ski. The Sonic Averaging System is comprised of a 24 ft. aluminum beam holds four Sonic Trackers which continuously measure the elevation over the surface, automatically averaging and adjusting tow point cylinder. The SAS is convenient, maneuverable and produces a great finished surface.


Smoothtrac utilizes four Sonic Tracker sensors working in unison to provide superior averaging results while eliminating the cleaning and repair inherent in traditional skis. Smoothtrac adds additional electronic averaging to further smooth the ride. With Smoothtrac, you can back-up, turn around, even pave around curves without removing the ski. When not in use it folds up and out of the way.