Sensor volumetrico. Volumetric sensor

Do you know which kind of volumetric sensor is available for detec permanent presence if people ?

@vladimirl03 the installation and troubleshooting is NOT for your projects but to get the system working.
I have moved your question to a better place.

My answer is No.
A PIR sensor will only detect people when they move.

You could try a thermal imaging camera but those are very expensive.