On Thu, 11 Dec 2003 19:29:21 GMT, "padeen"
wrote:

Anyone found a source for 12 volt IR detectors?

I hope You are joking, as they are all 12V for normal alarm use.
/Marcus

--
Marcus AAkesson
Gothenburg Callsigns: SM6XFN & SB4779
Sweden
Keep the world clean - no HTML in news or mail !

Marcus, are you capable of understanding that your post reveals our combined
ignorance? I'm an electrician who's been installing 120V IR sensors for
many years, but haven't had any alarm experience. You, on the other hand,
see the world from the 12V side. Shall we both broaden our knowledge?

Padeen


"Marcus AAkesson" wrote in message
...
On Thu, 11 Dec 2003 19:29:21 GMT, "padeen"
wrote:

Anyone found a source for 12 volt IR detectors?

I hope You are joking, as they are all 12V for normal alarm use.
/Marcus

--
Marcus AAkesson
Gothenburg Callsigns: SM6XFN & SB4779
Sweden
Keep the world clean - no HTML in news or mail !

Marcus, are you capable of understanding that your post reveals our combined
ignorance? I'm an electrician who's been installing 120V IR sensors for
many years, but haven't had any alarm experience. You, on the other hand,
see the world from the 12V side. Shall we both broaden our knowledge?

Padeen


"Marcus AAkesson" wrote in message
...
On Thu, 11 Dec 2003 19:29:21 GMT, "padeen"
wrote:

Anyone found a source for 12 volt IR detectors?

I hope You are joking, as they are all 12V for normal alarm use.
/Marcus

--
Marcus AAkesson
Gothenburg Callsigns: SM6XFN & SB4779
Sweden
Keep the world clean - no HTML in news or mail !

"padeen" wrote in message
...
Marcus, are you capable of understanding that your post reveals our
combined
ignorance? I'm an electrician who's been installing 120V IR sensors for
many years, but haven't had any alarm experience. You, on the other hand,
see the world from the 12V side. Shall we both broaden our knowledge?


Well, I think Marcus is right. I think it would be fair to say that ALL IR
sensors for alarm applications are 12V, since it doesn't make sense to run
an alarm sensor at 120V when it will be connected to an alarm system that
works on low voltage. I think the 120V or 240V types you refer to are the
ones used to control a light. And you don't want to use these for an alarm
system because they react on anything. The alarm types are better in
discriminating between events that are important (moving people) and not
important (moving small animals for instance).

Meindert

"padeen" wrote in message
...
Marcus, are you capable of understanding that your post reveals our
combined
ignorance? I'm an electrician who's been installing 120V IR sensors for
many years, but haven't had any alarm experience. You, on the other hand,
see the world from the 12V side. Shall we both broaden our knowledge?


Well, I think Marcus is right. I think it would be fair to say that ALL IR
sensors for alarm applications are 12V, since it doesn't make sense to run
an alarm sensor at 120V when it will be connected to an alarm system that
works on low voltage. I think the 120V or 240V types you refer to are the
ones used to control a light. And you don't want to use these for an alarm
system because they react on anything. The alarm types are better in
discriminating between events that are important (moving people) and not
important (moving small animals for instance).

Meindert

The 120V sensors will control anything you want them to control, and have
considerable adjustment capabilities so as not to "react on anything",
including small animals, wind-propelled trees, or street traffic. But of
course all 12V alarm systems would have 12V sensors! However, I would
expect that the internal sensor electronics for both 12 and 120V is
essentially similar, with the difference being only in the PS & switch.

Padeen



"Meindert Sprang" wrote in message
...
"padeen" wrote in message
...
Marcus, are you capable of understanding that your post reveals our
combined
ignorance? I'm an electrician who's been installing 120V IR sensors for
many years, but haven't had any alarm experience. You, on the other
hand,
see the world from the 12V side. Shall we both broaden our knowledge?


Well, I think Marcus is right. I think it would be fair to say that ALL IR
sensors for alarm applications are 12V, since it doesn't make sense to run
an alarm sensor at 120V when it will be connected to an alarm system that
works on low voltage. I think the 120V or 240V types you refer to are the
ones used to control a light. And you don't want to use these for an alarm
system because they react on anything. The alarm types are better in
discriminating between events that are important (moving people) and not
important (moving small animals for instance).

Meindert

The 120V sensors will control anything you want them to control, and have
considerable adjustment capabilities so as not to "react on anything",
including small animals, wind-propelled trees, or street traffic. But of
course all 12V alarm systems would have 12V sensors! However, I would
expect that the internal sensor electronics for both 12 and 120V is
essentially similar, with the difference being only in the PS & switch.

Padeen



"Meindert Sprang" wrote in message
...
"padeen" wrote in message
...
Marcus, are you capable of understanding that your post reveals our
combined
ignorance? I'm an electrician who's been installing 120V IR sensors for
many years, but haven't had any alarm experience. You, on the other
hand,
see the world from the 12V side. Shall we both broaden our knowledge?


Well, I think Marcus is right. I think it would be fair to say that ALL IR
sensors for alarm applications are 12V, since it doesn't make sense to run
an alarm sensor at 120V when it will be connected to an alarm system that
works on low voltage. I think the 120V or 240V types you refer to are the
ones used to control a light. And you don't want to use these for an alarm
system because they react on anything. The alarm types are better in
discriminating between events that are important (moving people) and not
important (moving small animals for instance).

Meindert

On Thu, 11 Dec 2003 19:29:21 GMT, padeen wrote:

Anyone found a source for 12 volt IR detectors?

Pretty sure you can buy them from Eastern Distributors since you're an
electrician. They're available from all the alarm wholesalers - Ademco,
Tri-State, etc. - but they might not be willing to sell to you without a
bunch of rigamarole.
--

Larry
email is rapp at lmr dot com

On Thu, 11 Dec 2003 19:29:21 GMT, padeen wrote:

Anyone found a source for 12 volt IR detectors?

Pretty sure you can buy them from Eastern Distributors since you're an
electrician. They're available from all the alarm wholesalers - Ademco,
Tri-State, etc. - but they might not be willing to sell to you without a
bunch of rigamarole.
--

Larry
email is rapp at lmr dot com

On Fri, 12 Dec 2003 10:31:03 GMT, "padeen"
wrote:

Marcus, are you capable of understanding that your post reveals our combined
ignorance? I'm an electrician who's been installing 120V IR sensors for
many years, but haven't had any alarm experience. You, on the other hand,
see the world from the 12V side. Shall we both broaden our knowledge?

No offense meant!

I'm very well aware of all the AC (here 230V) IR sensors around, but
as the subject of the main thread was "Burglar alarms", the field of
application was pretty much given.

Since a fundamental requirement of alarm systems is to run on backup
power, everything is DC (usually 12V), just like in a boat (how
convenient) !

I have a boat alarm based on switches and an IR sensor and haven't had
any problems with false alarms. There are many nice products in the
market, and the latest offer positioning, alarm and remote control by
GSM/SMS. You can check the wind conditions from work, and then decide
to go out or not. Nice.

http://www.seakey.com/indexe.htm

http://www.boatgard.com/en/index.htm


/Marcus

--
Marcus AAkesson
Gothenburg Callsigns: SM6XFN & SB4779
Sweden
Keep the world clean - no HTML in news or mail !