I'm looking for a sensor to use as body heat sensor for medical project

Hi everyone, I'm looking for a sensor to use as body heat sensor for medical project, I'm trying to use LM35 with esp32 and IOT system but my problem is that I don't find it suitable (casing)
So any suggestions on what to use, and thank you in advance

Solution

You will need a PPG for the SpO2 & heartbeat - but yes, it will work with them in parallel