The BOQU PXG-2085Pro Online Nitrate Ion Meter offers a new way of Nitrate monitoring in different water application. The Nitrate Ion analyzer adopts advanced ion-selective electrode (ISE) technology for online continuous monitoring of Nitrate ion concentration in water effluent. The Nitrate ion electrode of the PXG-2085Pro online Nitrate ion meter made with a molded Nitrate PVC membrane.The working life of the Nitrate ion electrode (ISE) is over one year, because the ion sensor membrane is special designed by BOQU Instrument and it can be replaced in period according to water quality at site.so it can save much maintenance cost.