All possible sensors that can be activated by a human being either touch or infra or

Hi
I have no idea about electronics but i want to know about all the sensors that can be activated by a human being especially being present in a place.

Like i am in the office either dead or live just there will make it on and sensors i can trigger myself either manually voice touch morse code .

Are these sensors available like ready to use ?in a small or mini size that you can connect two wires to it and get it to work to switch on or off something.?
Is so where?
Is this stuff expensive.?
I want to try something quick first.
Any book to read about sensors?

Thanks

I heard that PIR sensors are used for human presence detection. You might wanna try that.

"Like i am in the office either dead or live just there will make it on" The only thing I can think of is a sensor that detects both entries and exits...You went in, you died or you didn't, you didn't exit, so you must be there.

Ken

as far as i am aware pir sensors detect the movement of a heat source using infra red.
if you throw a brick past a pir in theory it wont trigger, but if a cat or person went past it, it will trigger.

So using your own words. if your alive and moving a pir will work fine. If your dead and not moving a pir will not work.

Maybe you should try a heart monitor?? lol

maybe PIRs have a range on heat from different species.. you'll have to develop data profiling then.

Thanks a lot guys

I want a sensor that will be triggered by my presence in the office regardless of the heat condition or movement as it might be cold in the office and i might be paused for a while reading something so what can that be?

RFID tag on you and a one of these in the office. Alive, immobile, or dead...it works.
https://www.prlog.org/10223510-longdistance-rfid-reader-offers-read-range-up-to-40-feet.html

Ken