Hi, I am doing my final year project regarding to PIR sensor which i am going to use PIR sensor to sense the human body temperature. I have do some research on PIR. I found out that is very difficult to get the PIR sensor information. Now, even i don't know there are how many types of PIR sensor in the maket which is easily to get.May somebody guide my where should i go, to search (internet) for the PIR temperature sensor infomation? hank you very much.