need sensor which can detect human presence

Other Hardware Sensors
1

Hi,
I am looking for sensors which can detect presence of human whether human is in motion or in rest? kindly give me some suggestions about human sensing sensors.
Thanks.

2

It's very hard to distinguish a human from any other similar-sized warm-blooded animal.
Are you allowed to attach anything to subject?

3

"If you are human , please press the big red button..."

4

Infrared sensor that only detects above 4 feet or so.

5

raschemmel:
"If you are human and read English, please press the big red button..."

6

English? French? Spanish? Italian? German? Other languages?

Hand-Arrow pointing to a button picture?

7

How about just a big shiny red button? No instructions needed. Put a blinking light above it, and you'll get nearly 100% detection.

I built a jacob's ladder (rising arc) in a mad scientist looking wooden box with blinking lights and two big rotary knobs on it. Even in an artshow with signs saying "don't touch", and a sign next to it that said "Hazardous voltage! Do not touch!", people would still turn the knobs and put their hand on the plexi over the arc.

8

Connect output of one of these, mounted on a servo to pan back & forth. Arduino controls panning, triggers a reading. Take measurement - pan a few degrees - take measurement - pan a few degrees, etc. Program for back & forth panning if not located in an open area.
http://www.homedepot.com/s/infrared+thermometer?NCNI-5

9

I am looking for sensors which can detect presence of human whether human is in motion or in rest

While a PIR sensor will only nominally detect movement, it is hard for some one to sit so still as to not trigger it.

10

http://www3.panasonic.biz/ac/e/control/sensor/infrared/grid-eye/index.jsp

11

Consider using a Rasberry Pi (or similar) with a camera and face detection software.

(If it is dark you could consider using IR cameras, but may have poor performance)

It would help a lot to provide a more comprehensive description of the problem you want to solve. (= more details)

12

CrossRoads:
Infrared sensor that only detects above 4 feet or so.

if (identity == Sasquatch )
{
  runLikeHell();
}
13

You need to tell us a bit more about your project.

I'd probably try webcam, capacitive sensing or pressure sensors (under the floor), depending on what the application is.