Thermo Scientific Orion High quality equivalent Thermo Scientific Orion probes direct from the manufacturer at substantial saving. Replacement (refillable) for Orion Nitrate Ion Selective Electrode "9707BN" Replacement Fluoride Orion Ion Selective Electrode 9609BNWP Replacement for Orion Ammonia Ion Selective Electrode (ISE) 9512BNWP Replacement for Orion Calcium Ion Selective Electrode "8740" Replacement for Orion Carbon Dioxide Ion Selective Electrode "9502BNWP" Replacement for Orion Chloride Ion Selective Electrode "9617" Replacement for Orion Copper Ion Selective Electrode CUO1502 Replacement for Orion Cyanide Ion Selective Electrode "9406BN" Replacement for Orion Fluoroborate Ion Selective Electrode "9305BN" Replacement for Orion Iodide Ion Selective Electrode "9653BNWP" Replacement for Orion Lead Ion Selective Electrode "9482BN" Replacement for Orion Nitrogen Oxide Ion Selective Electrode "9707BN" Replacement for Orion Perchlorate Oxide Ion Selective Electrode "PER1502" Replacement for Orion Potassium Oxide Ion Selective Electrode "9719B" Replacement for Orion Silver/Sulfide Ion Selective Electrode "9616BN" Replacement for Orion Sodium Ion Selective Electrode "8611BN" Replacement for Orion Sodium PPB Ion Selective Electrode "8611BN" Replacement for Orion Water Hardness Ion Selective Electrode "WHA1502" Replacement for Orionâ„¢ 9162BNWP Low Resistance pH Spear Tip Electrode Replacement Orion Bromide Ion Selective Electrode "9635BNWP" Replacement Orion Cadmium Ion Selective Electrode "9448BN"