Guest Kez Petre Posted February 3, 2005 Share Posted February 3, 2005 Over the past week there's been a constant high pitched sound in our dining room (and no, its not the kids!). Really uncomfortable: can't stay in the room for long. Also difficult to locate the exact source of the sound because of its pitch. Having tried to rule out everything else, we think it might be the alarm sensor that is making the noise. The sensor is part of a Securit 800L system, coming up 3 years old. Has anyone come across this as a fault and could give some advice? Many thanks! Link to comment Share on other sites More sharing options...
FASTCAR Posted February 3, 2005 Share Posted February 3, 2005 Are you sure its a sensor and not a speaker? Link to comment Share on other sites More sharing options...
breff Posted February 3, 2005 Share Posted February 3, 2005 Battery dying on an old cordless phone? I've had that one on callout, they swore blind it was from the alarm. The opinions I express are mine and are usually correct! (Except when I'm wrong)(which I'm not) Link to comment Share on other sites More sharing options...
Guest Posted February 3, 2005 Share Posted February 3, 2005 Can't say as I've ever heard a PIR making a noise, (other than Optex ones clicking!) . I'd put money on it being anything but the PIR, assuming it is just a PIR. Is there a speaker in there somewhere, some people hide them in voids, or a faulty heating pump, that's another one where the sound travels quite well. Link to comment Share on other sites More sharing options...
Guest IM_Alarms Posted February 3, 2005 Share Posted February 3, 2005 same as all the others, the sensor shouldn't make a noise like that. We are talking about a movement sensor aren't we? Not the extension speaker/ sounder? have you looked at smoke detctors/alarms........... telephone system..... television/ video equipment .............. have you ever had tinitus? Link to comment Share on other sites More sharing options...
Smart Electrics Posted February 3, 2005 Share Posted February 3, 2005 Is the pitch very high if so it could be the relay in the PIR acting as a Piezo. Does the PIR light stay on continuously. I have come across this noise before but not with a PIR but with a Reed relay. Link to comment Share on other sites More sharing options...
Guest Guest Posted February 3, 2005 Share Posted February 3, 2005 Have you got smoke detectors? Have you ever changed the batteries? Link to comment Share on other sites More sharing options...
Brian c Posted February 3, 2005 Share Posted February 3, 2005 or the thermostatic valve on a radiator?! If you don't know......ask. Link to comment Share on other sites More sharing options...
Guest Guest Posted February 3, 2005 Share Posted February 3, 2005 Go to the main fuse board and switch off the power for a couple of minutes? Does it stop? what else happens? Link to comment Share on other sites More sharing options...
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