Guest cdyckes Posted July 25, 2004 Share Posted July 25, 2004 I want to fit two sensors to maximise coverage of a largish lounge. I've got the Texecom Mirage DT sensors which have PIR and uWave and wonder if anyone has experience of doing this and is it is wise to use two uWave sensors in the same room (do they interfere even if the uWave sensitivity is reduced, and so would it make sense for the second sensor to be PIR only?). Following from this, do you get back-scatter from the uWave transmiitter? If so would this cause a problem if two such devices were effectively back-to-back on opposite sides of the same wall covering two seperate rooms. Hopefully this is the last of the newbie questions for now Colin Link to comment https://www.thesecurityinstaller.co.uk/community/topic/2976-two-dt-sensors-in-one-room/ Share on other sites More sharing options...
Service Engineer Posted July 25, 2004 Share Posted July 25, 2004 Your asking some sensible questions for a newbie Firstly 2 detectors of the same type should not be allowed to cover the same area. You could just use the PIR in the 2nd sensor but it seems a waste of a Dual Tech to me. There is some back scatter from the microwave but it should not cause problems when devices are back to back. ........................................................ Dave Partridge (Romec Service Engineer) Link to comment https://www.thesecurityinstaller.co.uk/community/topic/2976-two-dt-sensors-in-one-room/#findComment-18490 Share on other sites More sharing options...
Guest Posted July 25, 2004 Share Posted July 25, 2004 you also need to make sure they are different freq' or you will get cross talk which makes the mw unstable and liable to fa's Link to comment https://www.thesecurityinstaller.co.uk/community/topic/2976-two-dt-sensors-in-one-room/#findComment-18495 Share on other sites More sharing options...
Guest cdyckes Posted July 25, 2004 Share Posted July 25, 2004 Thanks. I'll go for a Prestige MR PIR as the second sensor in the room. Can't change the uWave frequency so will have to see if any interference problems exist when I've installed the system. Polar diagram shows no back-scatter but I'd be amazed if that was true. Colin Link to comment https://www.thesecurityinstaller.co.uk/community/topic/2976-two-dt-sensors-in-one-room/#findComment-18498 Share on other sites More sharing options...
breff Posted July 25, 2004 Share Posted July 25, 2004 Dont fit dualtecs back to back, the mw pattern can go up to a meter behind the sensor and they will interfere with each other. The opinions I express are mine and are usually correct! (Except when I'm wrong)(which I'm not) Link to comment https://www.thesecurityinstaller.co.uk/community/topic/2976-two-dt-sensors-in-one-room/#findComment-18538 Share on other sites More sharing options...
Chris Teague Posted July 25, 2004 Share Posted July 25, 2004 A previous firm I used to work for had a lot of problems with the C100 DT (Napco I think) whereby back to back, they hardly picked up movement at all. They ended up re-locating some of them. Chris Teague (Sales & Operations Manager) Sightguard Intruder Division Covering the Isle of Wight: - Design, Installation, Maintenance & Takeover of Intruder Alarms, Fire Alarms & Equipment, CCTV, Access Control, Nursecall. Keyholding Service, Guarding & Cash in Transit. SSAIB & NICEIC Registered Tel 01983 884000 / 884440 Any comments / opinions posted could be the voices in my head speaking, but they are my opinion only and do not represent those of my employer or Company Link to comment https://www.thesecurityinstaller.co.uk/community/topic/2976-two-dt-sensors-in-one-room/#findComment-18545 Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.