Electric arc-discharge probe for the proportional measurement of the concentration of oxygen in a composite gas, in particular in gases issuing from a chemical air-fuel combustion.

摘要

The two electrodes (2,4) are produced in the form of two tapered tips facing one another and slightly apart so as to obtain a symmetrical discharge. One of the electrodes is subjected to a high voltage so as to obtain a glow-like noisy arc discharge. The result of the measurement, which can be the mean value of the current occurring between the electrodes or the mean value of the high voltage applied or the discharge frequency, is remarkably independent of temperature variations as a result of the "symmetry" of the discharge. <IMAGE>