KPM KRA and KRT Retention Measurement

Accurate retention measurement for reduced paper variability and sheet breaks

ABB’s ultimate solution for monitoring and control of paper or board machine retention is KPM KRA and KRT Retention Measurement. The modern design coupled with the highest volume of individual measurements available ensures long-term use and accurate measurements.

ABB offers two options for paper and board machine retention monitoring and control:  the KPM KRA sensor measures total consistency and ash consistency, while the KPM KRT sensor is for total consistency only. The measurement range for total consistency is 0–2.0 percent Cs and 0–1.0 percent for ash consistency. 


  • Accurate total consistency and ash measurement for headbox and white water
  • Latest optical sensor technology
  • Robust stainless steel construction


  • Web break reduction
  • Faster grade changes and start-ups
  • Optimization of retention chemicals
  • Reduced MD variation for basis weight, moisture content and ash content

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