Hanna Instruments ion selective electrodes

Hanna Instruments’ ion selective electrodes can be grouped into three general categories based on construction.

Solid-state electrodes are available as both single half cells or as combination electrodes complete with reference electrode. These electrodes incorporate a solid sensing surface made of compressed silver halides, or solid crystalline material. Sensors are available for the determination of bromide, cadmium, chloride, cupric, cyanide, fluoride, iodide, lead and silver ions.

Liquid membrane electrodes are available as single half cells or as combination electrodes complete with reference electrode. The sensing surfaces of these electrodes comprise a homogeneous polymer matrix containing organic ion exchangers selective for the determined ion. These sensors incorporate easily replaceable membrane modules and are available for the measurements of nitrate, potassium and calcium.

Gas sensors are combination electrodes that detect dissolved gases in a solution. No external reference is required for these electrodes. The sensing element is separated from the sample solution by a gas permeable membrane. This range includes the HI4101 ammonia electrode and the HI4105 carbon dioxide electrode.