WTW VARiON® Plus A comp SET NH4, digital valve for ion-selective measurement of ammonium and nitrate

• Robust digital valve for ion-selective measurement of ammonium and nitrate (in situ) • For connection to the IQ Sensor Net System delivery: • faucet VARION® Plus 700 IQ • Reference electrode VARION® Plus Ref • ammonium sensing electrode VARION® Plus NH4 • compensation electrode VARION® Plus K (potassium) • Connection cable SACIQ ordered separately.