The invention discloses an oxygen concentration monitor using a Galvanic cell type oxygen sensor. An automatic calibration circuit always calibrates the maximum output of the sensor as the value corresponding to an oxygen concentration of 21%, based on the fact that the oxygen concentration in a fresh...http://www.google.es/patents/US4914424?utm_source=gb-gplus-sharePatente US4914424 - Oxygen concentration monitor using galvanic cell type oxygen sensor
Oxygen concentration monitor using galvanic cell type oxygen sensor
