Thermo Scientific Orion 9453BN Iodide Electrode with BNC Connector, 1.0 to 5 x 10-8 M Iodide ion selective electrode (ISE) measures iodide (I-) concentration in milk, feeds, plants, pharmaceuticals, and other aqueous solutions Solid-state sensor allows for dry storage and eliminates the need for membrane replacement Epoxy body for impact resistance and durability Measurement range is 127,000 to 0.005 ppm, and main interfering ions are S-2, CN-, S2O3-2, Cl- and Br- Electrode is 110mm long, and is available with a screw cap connector or a BNC connector for attaching to compatible meters