The BOQU PXG-2085Pro Online nitrite Ion Meter offers a new way of nitrite monitoring in different water application. The nitrite Ion analyzer adopts advanced ion-selective electrode (ISE) technology for online continuous monitoring of nitrite ion concentration in water effluent. The nitrite ion electrode of the PXG-2085Pro online nitrite ion meter made with a molded nitrite PVC membrane.The working life of the nitrite 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.