Datex-Ohmeda S/5 Anesthesia Monitor
Document No. 800 1005-1
6
2.1.2
O
2
measurement
The differential oxygen measuring unit uses the paramagnetic principle in a pneumatic bridge
configuration. The signal picked up with a differential pressure transducer is generated in a
measuring cell with a strong magnetic field that is switched on and off at a frequency of 110 Hz.
The output signal is a DC voltage proportional to the O
2
concentration difference between the two
gases to be measured.
Switched
magnetic
field
Mixture
out
Electromagnet
Microphone
Sample in
Reference in
Figure 2
O
2
measurement principle
Summary of Contents for S/5 G-AO
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