Phoenix electrodes cover a wide range of ISE applications
Polymer Membrane Electrodes Consist of
various ion exchange materials in an inert matrix such as PVC, polyethylene or silicone rubber. The membrane is sealed to the end of a PVC tube.
The potential developed at the membrane surface is related to the concentration
of the species of interest. Electrodes of this type include Potassium, Calcium
Solid State Electrodes Utilize relatively
insoluble inorganic salts in a membrane. Solid state electrodes exist in a
homogeneous or heterogeneous forms. In both types potentials are developed at
the membrane surface due to the ion exchange process. Examples of this type of
electrode include silver / sulfide, chloride and fluoride.
Gas Sensing Electrodes Gas sensing electrodes
are available for the measurement of ammonia, carbon dioxide,
and nitrogen oxide. This type of electrode has a gas permeable membrane
and an internal buffer solution. The pH of the buffer solution changes as the
gas reacts with it. The change is detected by a combination pH sensor within
the housing. This type of electrode does not require a an external reference
Glass Membrane Electrodes Glass membrane
electrodes are formed by the doping of the silicon dioxide glass matrix with
various chemicals. The most common of the electrode of this type is the pH
electrode. Glass membrane electrodes are also used for sodium ions.
Selective Electrodes are available as half-cells (mono) and
combination electrodes where the reference is built into the
probe. Available in glass or epoxy. Mono electrodes
require the use of an additional reference electrode.