Model 242 flow-through toroidal conductivity sensor from Emerson Process Management, Rosemount Analytical, Liquid Div is ideally suited for black liquor applications in pulp and paper processing.

Available in line sizes of 1-4 in., Model 242 will not clog in black liquor environments, providing accurate measurements in viscous, abrasive, and fibrous solutions. It is easy to install and can be configured in over 250 combinations to meet a variety of customer needs. The replaceable liner in glass-filled PEEK or Teflon reduces long-term operating costs, and inline calibration reduces maintenance and downtime.

"It's the ideal instrument for measuring black liquor and the productivity of the wood digestion process, allowing our customers to better control the entire process," said John Wright, vp of marketing, Emerson Process Management, Rosemount Analytical, Liquid Div.

Rosemount Analytical toroidal conductivity sensors are ideal for use in processes where conventional sensors with electrodes exposed to the measured solution would corrode or become fouled. The Model 242 flow-through toroidal conductivity sensor consists of wire-wound toroids that are isolated from the process. One toroid acts as a transmitter and the other as a receiver. Energizing the transmitter toroid induces an electric current in the process solution, which induces an electric current in the receiver toroid. The strength of that induced current is directly proportional to the conductivity of the solution.