anyone have experience with infrared motion sensors?

[Aleena]

I want to get a beam style infrared motion sensor for our bridge so I know when people are coming before they reach the driveway

So. Are any of you familiar with this? I know there are grid based moton sensors that detect any movement over a wide area, but I just want a beam that alarms when it is broken.

Roughly the beam needs to reach across a 14 foot gap, And the sensor itself needs to either be capable of sending the signal wirelessly 260 feet, Or have one hell of cord to it.

Assist?

[Aleena]

Tripwires would be too obvious. and verrrrrrry long. and resetting them would suck.

[Kain]

I vaguely recall having one marketed as a kids toy for a while.
Had a max of ~300 feet before it started setting itself off.

Shouldn't be too hard to find something, but the toy was discountinued.

[Aleena]

If a highly trained spy is trying to get into my room, then I'll worry about the specifics.

I am talking about for my needs, Not yours.

[Enjoi]

I am talking about for my needs, Not yours.

Now that's just selfish.