Anybody know anything about the innards of those fingertip
O2 rate meters? sensor, theory of operation
RichD wrote:
Anybody know anything about the innards of those fingertipShine a red light and an infrared light through* a blood vessel onto an
O2 rate meters? sensor, theory of operation
opto sensor.
check the relative absorption of the two wavelengths in the blood, there
is a correlation between oxygen saturation and their absorption ratio.
Shine a red light and an infrared light through* a blood vessel onto an
opto sensor.
check the relative absorption of the two wavelengths in the blood, there
is a correlation between oxygen saturation and their absorption ratio.
On Feb 16, 2021, Andy Burns wrote
Shine a red light and an infrared light through* a blood
vessel onto an opto sensor.
Why red?
On Feb 16, 2021, Andy Burns wrote
(in article<news:i934p3...@mid.individual.net>):
Shine a red light and an infrared light through* a blood vessel onto an opto sensor.
check the relative absorption of the two wavelengths in the blood, there is a correlation between oxygen saturation and their absorption ratio.Why red?
TIA
Ron, the humblest guy in town.
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