CSRR (Close Spaced Roller Rack)

World Patents Pending - CST’s CSRR design gives the highest possible accuracy for a beltweigher system anywhere in the world.

BELT WEIGHER VARIANT: Non-Intrusive CSRR (Closed Space Roller Rack)

CST’s CSRR design gives the highest possible accuracy for a beltweigher system anywhere in the world.

The principal of the Closed Space Roller Rack (CSRR) design is to improve accuracy by reducing the ratio of angular misalignment effect of the tensioned belt. This is achieved through an increased effective weigh length and significantly reduced material and belt agitation within the transition of material into and out of the weigher zone.

This system is able to provide 0.1% repeatability for periods of up to 12 months without recalibration and has demonstrated itself as the only system on the market capable of this level of accuracy.




CST’s CSRR variant usually come in a Non-Intrusive design. This is a weightometer that can be installed to a conveyor without the need for modification of the conveyor structure.

The installation of any industry standard beltweigher to a conveyor structure would require the removal of angular bracing, cross bracing and any other structural steel located within the conveyor section where the beltweigher is to be located. Removal of structural steel potentially weakens the conveyor and requires re-engineering of the truss or conveyor modules.

CST’s Non-Intrusive beltweigher is designed to sit above any variation of conveyor without the need for removal of structure, saving on required site modification work and re-engineering costs.



A precision fully suspended 4 point conveyor weighing system

  • 4 load cells (with stainless pod covers) 
  • 2 - 8 idler weighlength 
  • NMI trade approved class 0.5 
  • Individually engineered/custom designed (application based engineering) 
  • CSRR Accuracy application up to 0.1%



  • Highest Accuracy available in the belt weighing industry. 
  • Improved material transition 
  • Reduced angular misalignment ratio 
  • Less material and belt agitation on the weighframe 
  • Non Intrusive design means no modification to existing conveyor structure 
  • Non Intrusive design saves on engineering costs 
  • Non Intrusive design means no weakening of the truss or conveyor module for installation 
  • Can be designed to suit any conveyor 
  • Direct force measurement 
  • Low profile design 
  • Factory or site assembled 
  • CST roll height adjustment CAMs (CST weigh quality idlers) 
  • Galvanised and or painted to customer specification 
  • Solid mild steel construction or stainless steel for extreme environments 
  • Designed and Built in Australia
  • Accuracy up to +/- 0.10% error - application engineered 
  • Designed for minimal material build up



  • Fully non-intrusive design (no conveyor modification required) 
  • Extended idler pitch (for high tension belts) 
  • CST weigh quality idlers (robust design, CAM adjustment, minimal material build-up)



6/14D/13 Class 0.5 Belt Weigher 2003 (first approved 1996) 

MC 0.1% Belt Scale Approval AM-5612 2007
MC 0.5% Belt Scale Approval AM-5442 2007 (first approved 2002) 

Certificate of Conformity 2003 Class 0.5 Belt Scale R50/1997-AU-03.01 

MID application in process 

NTEP 0.25% Belt Weigher Certificate 02-135
Australian Patent No: 631695