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A Proudly Canadian Corporation  Serving the pulp, paper, and board industry for three generations     

A Brief History

Pulmac Inc was incorporated in 2003 and, in 2012, became a founding shareholder in Pulmac Systems International Inc of Williston, Vermont. Pulmac Inc was responsible for all manufacturing and service until it formally broke with Pulmac Systems in May, 2015. Changing its name to QS Fibre Inc in 2016, the Montreal-based company  offers the  AutoScan for on or off-line determination of fibre, shive, and fines size distributions as well as competitive products and services for :

  • Pulmac MasterScreen, Z-Span Tester, Automated Sheet Former, Beater, and Dewatering Device.
  • Provisioning of testing services, in-mill service support, and mill studies

QS Fibre is owned and  operated by Brent Cowan, son of Wavell Cowan and grandson of inventor, industrialist and Pulmac patriarch, Eli Cowan.

W. Brent Cowan, CD MSc


QS Fibre : Committed to integrity

Atholville NB Pulp MillAtholville NB Pulp Mill

White Paper on Pulmac Shive Analyzer/QS FibreScreen  vs AutoScan Correlation 


QS AutoScan User Manual


QualScan User Manual


QS FibreScreen User Manual


QualScan Application Software (Windows 7 or 10 OS)

In the freeware version, the Viewer module is inactive, data is not stored, and the only measurements displayed on-screen are: Total Count, Average Area, and Total Area. To upgrade to full functionality a USB hardware licensing dongle is required. This can be purchased from QS Fibre directly or through any accredited agent.


 QS Zero-Span Tester Manual