2D Sonic Control for Asphalt Pavers - Roper Laser- Asphalt paver sonic sensor slope sensor ,Topcon's Paver System 5 is compatible with all major models of asphalt pavers. Sonic Tracker II; High-resolution for versatile performance. ... Slope Sensor. 100% ...NIVELTRONIC® Plus: efficient paving true to line and level ...Perfect match between paver and automated grade & slope control guarantees top quality. ... The sonic sensor installs easily, and so is its handling.