With the rate of technological development taking place in this modern era, even medical instruments and devices are fast becoming smaller and more affordable. When it comes to the finger pulse oximeter, the once massive large equipment can now literally fit in your pocket. What the pulse oximeter does is measure the oxygen saturation level in the blood.
These more compact models can provide the same valuable data as compared to the ones which are placed on you when you are in the hospital. To use a finger pulse oximeter, you place one end of the device on your fingertip and the reading comes up on the screen in a few seconds.
Here's the basis of how the oximeter works in order to provide accurate readings of the oxygen saturation levels in the blood: infrared light is absorbed by oxygenated hemoglobin and the red light is allowed to pass through. You can also buy pulse ox tester at pronktech.com/product/ox-1-oxsim-miniaturized-optical-spo2-pulse-oximeter-tester/.
On the other hand, the opposite is said for the deoxygenated blood. Beams of red light and infrared light are directed from the oximeters through your finger and go onto the photodetector on the opposite end.
The photodetector then calculates the ratio of the red light to the infrared light. This then gives the oxygen saturation level. Persons who are healthy will have an oxygen saturation level between 95% to 99%. The oxygen saturation level indicates how well the heart, lungs, and blood are supplying organs with oxygen.