I'm trying to find an optimal sensor, but I have difficulties.
The criteria of choosing it is:
- form factor: small, to be placed on an Adafruit Flora
- non-invasive (placed on the wrist)
- work fine while in motion
Currently I have a climate sensor, which could help.
Options I found so far:
- heart rate monitor: depends on finger tips
- skin conductivity: not enough accurate on wrist
- oxymeter (level of oxygen in blood): not accurate in motion
- CO2 sensor: not accurate due to sampling method (breath out on it)
Any suggestions?