301-75 Chloride Mono ION Selective ElectrodeION selective electrode for a wide range of applications that require greater accuracy. About Chloride Mono ION Selective Electrode This electrode requires a separate reference electrode. Ideal for applications where greater accuracy is required (especially when ION levels are low). More detailed examples of ideal applications can be found below. Applications River water Tap water Soil Food samples Urine Sweat Plants Boiler water Specifications