Member Since: June 19, 2009

Country: United States

  • Is this 600mA output max or input max?

  • This will actually work perfect for a SpO2 meter. The best IR wavelength to use is 950 nm, you would shine the IR through the finger/wrist and record the result. Then you would shine a bright red LED through the same area and compute the ratio between the two results. You do this since oxyhemoglobin has no resistance to IR but does have a computable resistance to red light. More explained here: http://www.equipmentexplained.com/physics/respi_measurements/oxygen/oximeter/pulse_oximeter.html