Slew Control - PME300 & 300+

PME300 & PME300+ - Slew Limiters

PME300 and PME300+ are Prolec's purpose-designed systems to control the slew of construction equipment.

PME300 and PME300+ monitor slewing machinery, such as excavators or truck cranes, and controls the travel within defined limits. Robustly engineered for compatibility with all major manufacturers of excavators and other construction equipment, this system will maximise your machine's productivity when slew control is necessary. PME300+ adds further functionality to the slew limiter providing access to create "virtual walls" and complex slew limits not available in the PME300 system.

Like all PME products, PME300 and PME300+ can be upgraded to use other functions simply and quickly through software changes to provide control on lifting, stability, machine envelope and cab protection.


PME300 and 300+ are slew limiters that monitor and control the radial motion of any slewing equipment. These systems will check the machine's movement relative to a pre-determined "safe" zone and warn of or control the machine's movement when approaching the limit. PME300 provides a simple zone of control using left and right limits whereas 300+ allows complex geometry and dual "virtual" wall control as needed. The system uses Prolec's proprietary "engine" so is independent of machine type allowing any slewing and articulating machinery to be monitored including fixed installations (e.g. deck cranes). The system will also provide full logging of operation and driver behaviour for later retrieval and play back and stores up to a year's worth of data. When combined with suitable hydraulic controls the system will lock out movement into predefined unsafe situations.


  • Fits any slewing equipment with virtually no hardware change
  • Easily upgraded to include height, load or guidance functions
  • Fully compliant to relevant codes
  • 300+ Monitors complex shapes and dual walls
  • Compatible with OEM design requirements for slew control

Suitable for

  • Excavators (multiple articulations possible)
  • Telehandlers
  • Mobile cranes (to EN13000:2010)
  • Truck mounted cranes
  • Agricultural machinery
  • Special purpose machines