Is this a fake pulse sensor? A couple of days ago, I purchased a pulse sensor online for a project. Before actually doing anything with it, I wanted to capture and view its analogue waveform output. One while placing my finger on it and one when in the default state, so that I can see the trend or difference in the two waveforms. But when I captured the output, it seems like there is not much difference. Just some random noise I guess. Also, I checked the company website who may have made this one and it all looks good to me.


The image below shows the waveform captured when no finger is placed on the sensor.

The image below shows the waveform captured when my index finger is placed on the sensor.

This is my setup for the sensor for measuring pulses.

This image shows the face of the sensor.



I need some insights from folks here regarding this sensor. Is it showing some junk output? or my understanding is wrong and there's a better way to figure this out/ work with this sensor.
The second trace looks like a pulse to me. With that kind of sensor you don't get the PQRST traces of an ECG - just a slight bump when you get a pulse.