Principal Of Operation - Ohio Medical Corporation MiniOX 1 Manual De Instrucciones

X 1
MiniO ® Oxygen Analyzer
Section 2

Principal of Operation

Each MiniOX 1 Oxygen Analyzer uses a galvanic
®
oxygen sensor which is long-lived and maintenance-
free.
The sensor consists of two electrodes:
• a cathode
• an anode
The gold cathode is exposed to the atmosphere
through a fluoropolymer membrane. The lead anode is
submersed in a potassium hydroxide solution.
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When oxygen diffuses through the membrane, the
electrochemical reduction of oxygen on the cathode
and the corresponding oxidation of the anode
generate an electrical current. The current produced
is proportional to the partial pressure of oxygen in the
sample atmosphere. The resulting electrical current is
monitored, temperature compensated, and amplified to
drive the display .
The sensor is self-zeroing; when no oxygen is present
to be chemically reduced and oxidized, minimal current
is produced. Thus, zero percent oxygen is displayed.
P/N 711462 (Rev.3) 02/2016
Section 2, Principal of Operation
2-1