ABB has launched its KPM KC9 Optical Consistency Transmitter family, a new range of sensors that provide accurate measurement of total and/or ash consistency for better wet end measurement and control in pulp and paper processes. The sensors are suitable for pulp, paper, board and tissue manufacturers using virgin or recycled raw materials, particularly those using ash fillers, where only optical sensors are effective to measure ash consistency.

Available as either inline or bypass sensors, the entire KPM KC9 Optical Consistency Transmitter family offers the widest range of sensor options currently available and is best suited to measure the lowest consistency ranges. Providing reliable and accurate results, the sensors permit maintenance while processes are running, unlike other consistency sensors which require a shutdown and emptying of the process pipe.

The sensors work in tandem with ABB's KPM KRA/KRT Retention Measurement System, used to monitor and control paper and board machine retention. Available in two options, the KRA unit measures white water total consistency as well as ash consistency. The KRT unit measures total consistency only.

"These new sensors employ unique measuring principles to ensure each application is covered cost effectively without compromising measurement accuracy," said Per Sandstrom, Head of Lab and Process Testing Measurements, Pulp and Paper, Process Industries, ABB. "The sensors provide better control of deinking processes and machine wet end, enabling the highest proportion of on spec product with limited maintenance and lower installation costs."

Besides its Optical Consistency Transmitter, ABB's retention measurement system includes all necessary modules to ensure accurate and trouble-free measurement of headbox or white water stock, where consistency is so low that only optical technologies can be used. The system and sensors are part of ABB's complete solution set for the wet end, including quality control, automation, advanced process control, instrumentation and much more.