Orion were the first company to develop Ion Selective electrodes (ISE) over 25 years ago. Since then the range has been constantly improved and expanded, now offering electrodes for 18 select ions. Ion selective electrodes are a proven method of determining ion concentrations in a wide variety of samples, making them applicable in virtually every laboratory.

Direct read is the most common use for ISE, requiring very little sample preparation. Ion concentration is displayed on the screen of an Orion ISE meter. Sample colour or turbidity does not affect measurement and typical analysis time is less than 1 minute. ISE's are also widely used with known addition and titration methods providing high accuracy and versatility.

QI3171 Chloride Liquid Membrane Sensing Module £214.00 QI3181 Ammonium Sensing Module £150.00 QI3191 Potassium Sensing Module £114.00 QI3200 Calcium Sensing Module £132.00 QI3320 Water Hardness Sensing Module £154.00 QI3460 Nitrite Sensing Module, pack of 3 £168.00 QI3501 Fluoroborate Sensing Module £189.00 QI3701 Nitrate Sensing Module, pack of 3 £168.00 QI3702 Nitrate Sensing Module, pack of 1 £64.10 QI3810 Perchlorate Sensing Module £180.00 QI7190 Potassium Sensing Module for Sure-Flow Combination Electrode £138.00 QI7200 Calcium Sensing Module for Sure-Flow Combination Electrode £138.00 QI7461 Nitrite Sensing Module for Sure-Flow Combination Electrode £138.00 QI7701 Nitrate Sensing Module for Sure-Flow Combination Electrode £138.00 QI8411 ROSS Sodium Electrode Half Cell, BNC £241.00 QI8611 ROSS Sodium Combination Electrode, BNWP £335.00 QI9300 Orion 93 Series ISE Handle, Waterproof BNC £180.00 QI9300S Orion 93 Series ISE Handle, Screw Cap £177.00 QI9305 Fluoroborate Half-Cell Electrode, BNC £521.00 QI9307 Nitrate Half-Cell Electrode, Waterproof BNC £409.00 QI9319 Potassium Half-Cell Electrode, BNC £416.00 QI9320 Calcium Half-Cell Electrode, BNC £416.00 QI9332 Water Hardness Half-Cell Electrode, Waterproof BNC £414.00 QI9342 Surfactant Half-Cell Electrode, BNC £574.00 QI9346 Nitrite Half-Cell Electrode, BNC £416.00 QI9406 Cyanide Half-Cell Electrode, BNC £320.00 QI9406S Cyanide Half-Cell Electrode, Screw Cap £296.00 QI9409 Fluoride Half-Cell Electrode, BNC £350.00 QI9409S Fluoride Half-Cell Electrode, Screw Cap £339.00 QI9416 Silver/Sulfide Half-Cell Electrode, BNC £337.00 QI9416S Silver/Sulfide Half-Cell Electrode, Screw Cap £325.00 QI9417 Chloride Half-Cell Electrode, BNC £298.00 QI9417S Chloride Half-Cell Electrode, Screw Cap £286.00 QI9429 Cupric Electrode Half-Cell, BNC £422.00 QI9429S Cupric Half-Cell Electrode, Screw Cap £452.00 QI9435 Bromide Half-Cell Electrode, BNC £297.00 QI9435S Bromide Half-Cell Electrode, Screw Cap £322.00 QI9448 Cadmium Half-Cell Electrode, BNC £389.00 QI9448S Cadmium Half-Cell Electrode, Screw Cap £401.00 QI9453 Iodide Half-Cell Electrode, BNC £347.00