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