Edwards 892-1B system at church

A false alarm caused by a dusty detector set of Edwards 892-1Bs about an hour before the church service started. About 20 of us were there to set up early in the morning. Here is the video:

And for those who may not know, here is a picture of an Edwards 892-1B:

May as well ask, what kind of detector was it?

Hey, don’t know if you’ll ever see this considering it’s been 8 years but it was a System Sensor 2400. I didn’t know back then so I guess I didn’t respond.