Clark Oxygen Electrode is a silver-platinum electrochemical cell whose electrodes are covered by non-conductive membranes. They are used to measure gaseous or solubilized oxygen in the liquid.

The Clark electrode [1] [2] is an electrode that measures ambient oxygen partial pressure in a liquid using a catalytic platinum surface according to the net reaction: [3] O 2 + 4 e − + 4 H + → 2 H 2 O. It improves on a bare platinum electrode by use of a membrane to reduce fouling and metal plating onto the platinum. [4]

Aug 6, 2015 · The Clark Oxygen Electrode. The principles of amperometric oxygen measurement are discussed at some length in the chapter on the platinum oxygen cathode. The major difference between this electrode and the earlier oxygen cathode is the addition of an oxygen-permeable membrane.

Jan 1, 1970 · These improvements make it practical to use an oxygen electrode in a routine clinical chemistry laboratory for the accurate measurement of the partial pressure of oxygen (Po2) of blood.1 Other methods of measuring oxygen tension are now rarely used.

A pO2 sensor, also widely known as a Clark electrode, is used to measure the partial pressure of O2 gas in a sample of air or blood. From: Introduction to Biomedical Engineering (Third Edition), 2012

The Clark (pO2) electrode measures oxygen tension amperometrically. That is the pO2 electrode produces a current, at a constant polarizing voltage (usually -0.6 V vs. Ag/AgCl) which is directly proportional to the partial pressure of oxygen (pO2) diffusing …

In unstirred water, oxygen therefore diffuses inwards along the PO2 gradient. The outside of the electrode membrane effectively senses a very much lower PO2 than that in the surrounding water. For this reason, most Clark-type electrodes require the water to be stirred.

Jul 22, 2015 · The document discusses gas-sensing electrodes, specifically the oxygen electrode and carbon dioxide electrode. The oxygen electrode uses a platinum cathode and silver/silver chloride anode arrangement to measure the partial pressure of oxygen in a solution.

The platinum wire, which is an active electrode, is embedded in glass for insulation and only its tip is exposed. It is kept in the electrolyte solution in which the oxygen is allowed to diffuse. The reference electrode is made up of silver-silver chloride (Ab/AgCl).

An oxygen electrode, also known as a polarographic electrode or Clarke electrode, is a device consisting of a gold or platinum cathode and a silver/silver chloride anode in a potassium chloride solution. It measures the concentration of oxygen by applying a DC voltage across the electrodes and measuring the current flow between them.