This is what I write to BARGAIN house that sells these detectors: "Hello, I am trying to place smoke detectors I bought you. By testing their reaction to the smoke of incense and a lighted newspaper, it was désapointés to see that there were no immediate alarm reaction. By cons there has been triggered within minutes when we had withdrawn the detector without the presence of smoke. Since there is no explanation of this phenomenon in the manual, I ask you to please provide me email. For now I wonder if I made a good buy security for the buildings covered by the detectors. A read Sincerely, "
I admit that this lag time between contact with the smoke and alarm triggering worries me. More than one minute. Is it to prevent the release of any smoke or steam momentary. If this is not specified in the instructions ...