What PIR sensor should I use?

Other Hardware Sensors
1

Can you please suggest any good PIR sensor that has good sensitivity from about 1.5 m upto 2 meters?
Thanks

2

i like the LHI parts... lhi1128 or lhi954 or lhi878...

they even react on warm air flowing from one room to the other, when the door is open (or my circuit is a door-open-detector... :roll_eyes:)...

3

Thanks for the reply.But what is a sensitivity of those PIR sensors?

4

I like the simple, bog-standard PIR sensors that do the job, but in a simple way. Check ebay: http://www.ebay.co.uk/itm/Infrared-PIR-Motion-Sensor-Module-Arduino-ARM-MCU-/300557944275?pt=UK_AudioElectronicsVideo_Video_TelevisionSetTopBoxes&hash=item45faa645d3 . "Range up to 7m".

Onions.

5

those LHI parts can do at least 1.5m with my circuit (it is an opamp with a 100uF cap on its negative input (it is fed by a 1MR resistor from the opamp output) and the output of the LHI at its positive input...)...