Ok, the sensor is very sensitive to artifacts in daily life, like body movement.
i have to know if it's a good quality data or not that's all.
I don't have any problem with your English . I can understand you perfectly well I understand that even after reading my last post you fail to understand that you can ask the same question over and over until Lassie comes home and the answer will be the same when she does. What are your criteria for " good quality data " ?
Do you have a problem understanding that ?
the sensor is very sensitive to artifacts in daily life, like body movement.
Also, in case it hasn't occurred to you, when you go to the doctor and the nurse sticks the pulse oximeter on your finger and tells you not to move, the reason is that movement degrades the data so if you were planning to collect data with someone moving then you really can't expect any quality data , can you ?