Honeywell Dualtec Dt7550a

[jjpearce05]

I am considering using these in my house for a new install.

What are the pros and cons of using dualtecs in a house - my aim is to reduce false alarms.

Are there any "health" issues with using microwave detectors in a house ?

Thanks

[james.wilson]

review

http://www.thesecurityinstaller.co.uk/comm...showtopic=24532

[Alarm Protection]

Not used these PIR,s but DT's are the best to use and no health issues. Honeywell are one of the top brands but also look at the Risco I-Wise as i have use them and they are good imo. Optex are also good.

[ViperMK2]

The cons with these, they are rather large. The Risco I-Wise and Optex are a more acceptable size for a domestic install. There have been some problems with a batch of the Honeywell False alarming. Make sure you dont over range the microwave so it picks up through windows.

[james.wilson]

the mic is less critical witrh these as they are k band, not the old x band the risco uses.

ANd id of said they were the same size. Id have to dig out the dimenesions but i wouldnt say there was much in it, if anything. PLus the anti mask on the i-wise has its own issues

[NitroN]

Installed correctly, DT's will be more reliable than a PIR.

Generally DT's will require more knowledge to install effectively.

Incorrect installation can create problems.

n

[The Arab]

I like these detectors,only problem I've seen is high resistance on the alarm contacts,probably just a bad batch,set up correctly they are great

[superstardeejay]

Just seen this topic, Ive had problems with a few of these.

At my parents' house, they have a draughty outbuilding (a huge barn/implement shed) which has always had problems with 'visitors'. Originally I fitted Pyronix colt PIRs with analogue pulsecount set to max. This was fine until birds started nesting in there, causing the odd false alarm, whenupon I fitted a couple of dual tech Pyronix units which worked just great; though at £38 a pop trade were pricey.

When some twonk bashed through an asbestos wall sheet and stole my brother's cordless nutrunner, I decided I needed another sensor. I fitted one of these honeywells; they were on offer at the time from a well-known trade wholesaler.

I've never had so many false alarms with it! I've had to turn both channels right down to minimum so that it needs to see a human in the building messing about for half a minute or so before it will turn red and trigger.

It's always the PIR section that seems too sensitive; the MW section seems great.

Putting it down to experience, I fitted a batch at my new premises a couple of years ago, including one in the loft space. After a few days it started false alarming; it turned out to be an Owl roosting in the loft triggering it. I turned it right down to minimum but the owl still triggered it.

In the end, I parallel-connected one of my parents old Pyronic colts with the Honeywell; that has cured the owl triggering but easily triggers on a human.

I guess dual techs aren't a catch-all solution!

[magpye]

Installed correctly, DT's will be more reliable than a PIR.

Generally DT's will require more knowledge to install effectively.

Incorrect installation can create problems.

Did you see this post, very relevant?

[superstardeejay]

yes

After having great results with the pyronix dualtechs I decided to give the honeywells a go. They are so sensitive that I had to turn them right down and it took several sessions before I got them about right.