Combined ion-selective electrode, 5 * 10-7...1 mol/L (0.02...40100 mg/L), polymer membrane, 1.2 m cable, BNC connector. Ion Electrolyte A: 51344750, membrane module Ca2+: 51344850, ISA solution: 51344761. Temperature range: 0 °C – 40 °C. Optimal pH Range: 2.5 - 11. Shaft length: 120 mm. Shaft diameter: 12 mm. Connector: BNC. Cable included.