WTW NO 800 DIN combined ionselective electrode

Combined Nitrate selective electrode, with 3.3 ft (1 m) cable, DIN plug, 0.4 to62,000 mg/L, requires ELY/BR/503/N reference electrolyte, ionic strength adapter TISAB/NO3,standard solution ES/NO3.Delivery contains electrolyte and 2 exchange heads!