Kimmo Koivula Juni. 27, 2022 Dear M. Waseem, Yield and efficiency improvements often start with real-time, reliable measurement. Vaisala’s process refractometers are widely used in pulp mills, and while the Brown Stock Washing line is a quite new installation position, they are particularly useful in the Brown Stock Washing line. We know from independent studies, that the effects are cumulative; small adjustments will bring huge savings. You can find references and some figures from our Brown Stock Washing eBook https://www.vaisala.com/en/industries-applications/pulp-paper-and-wood/brown-stock-total-dissolved-solids-measurement/bsw-ebook. But, the bottom line is, that you can only optimize and improve, and take other necessary actions when you know your yield and efficiency. Kind regards, Kimmo Reply