LaserDust™ Medium Path (MP), Long Path (LP), and Extra Long Path (XLP) Monitors are compact, optical dust monitors for true continuous in-situ measurement of dust concentration or opacity. 

The monitors are designed for measurement across pipes, stacks, and ducts with typical path lengths of 0.5 – 10 m. LaserDust™ Monitors use a transmitter/receiver configuration to measure the dust concentration along the optical line of sight. Our true non-contact approach is superior to point type dust meters. 

With innovative laser technology the LaserDust™ combines two measurement principles in one instrument. At low dust levels it operates with forward scattered light technology: 

The incident laser light is scattered by dust particles and collected onto a solid-state sensor for dust quantification. This highly sensible mode enables detection limits of < 0.5 mg/Nm3 and is unaffected by dust depositing on the windows. 

At high dust levels the LaserDust™ will measure transmittance or opacity: 

Light absorption by dust particles is captured by a 2nd sensor. 



Technical Description – LaserDust™


  • Response time down to one second 
  • Suitable for high temperatures 
  • Multiple configurations 

A Closer Look

  • Can measure dust concentration or opacity
  • Response time down to one second 
  • Suitable for high temperatures 
  • Cross stack measurement up to 10 m 
  • High dynamic range (mg or g with one instrument) 
  • Scattered light detection for high sensitivity 
  • Non-contact measurement 
  • No moving parts 
Neo Monitors LaserDust™


  • Aluminium smelters and steel works 
  • Waste incinerators, power plants or cement kilns 
  • Scrubber and filter optimization 
  • Bag house filter surveillance 
  • Dust explosion prevention 
  • …and more 

Customer Benefits 

  • In-situ monitoring 
  • Exceptionally reliable real time analyser 
  • Low maintenance cost 
  • Reduce emission to the environment 
  • Easy to install and operate 
  • Reduce daily operation costs 
  • Optimise process 
  • Well proven measurement techniques 

Data Sheet – LaserDust™

IECEx Certificate of Conformity

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