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Old 02-22-2011, 11:24 AM #1
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Default Anyone ever shine their 1W+ 445 on one of these?

Common sense goes a long ways but perhaps there should be a list of things that one should not do!

This would be one such thing



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Old 02-22-2011, 12:33 PM #2
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Default Re: Anyone ever shine their 1W+ 445 on one of these?

I have been told many times, by many different people - usually sprinkler installers and the like - that when one of these pops, it's just the one, not the entire system, as Hollywood would have you believe...


Still not a good idea, because if there is no fire in the hotel room, and the sprinkler started sprinkling, they may very well blame (= $charge) the occupant.

I await the video of someone trying to prove me wrong.
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Old 02-22-2011, 12:50 PM #3
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Default Re: Anyone ever shine their 1W+ 445 on one of these?

I think they activate by smoke rather than heat...
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Old 02-22-2011, 12:55 PM #4
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Default Re: Anyone ever shine their 1W+ 445 on one of these?

So did you get showered in the end?
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Old 02-22-2011, 03:38 PM #5
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Talking Re: Anyone ever shine their 1W+ 445 on one of these?

Quote:
Originally Posted by Leodahsan View Post
I think they activate by smoke rather than heat...
Those respond to heat and i would not try to point a 1 watt to them

a good 70 PSI behind them
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Old 02-22-2011, 04:00 PM #6
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Default Re: Anyone ever shine their 1W+ 445 on one of these?

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Originally Posted by Leodahsan View Post
I think they activate by smoke rather than heat...

These are individually (non managed) sprinklers. They activate when the liquid inside the capsule expands and fills up the empty space. Without that capsule to hold back the water, it comes out and boy will it come out!

Yeah I definitely don't recommend doing this to a head on a charged line! Find a spare and do it on your desk. It will still make a little mess like breaking a thermometer but that beats having 100s or even 1000s of gallons of stinky water gushing in.
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Old 02-22-2011, 04:29 PM #7
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Default Re: Anyone ever shine their 1W+ 445 on one of these?

The fluid is even RED for perfect absorption. LOL..

And yeah, those sprinkler heads was one of the FIRST things I thought of when I started reading about the 445nm's..
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Old 02-23-2011, 02:21 AM #8
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Default Re: Anyone ever shine their 1W+ 445 on one of these?

it would probrably even work from like 25 feet away.........(rubs hands together)
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Old 02-24-2011, 05:04 AM #9
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Default Re: Anyone ever shine their 1W+ 445 on one of these?

It would take a mounted 1W 445 laser and probably about 3 minutes to heat up the entire volume of the capule high enough to break it. It wouldn't exactly be something you could do in a few seconds....
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Old 02-24-2011, 12:59 PM #10
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Default Re: Anyone ever shine their 1W+ 445 on one of these?

maybe not. These things are sensible because they need to save lifes. anyways, if someone is going to try, I recommend a lotta O-rings and waterproof testing .
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Old 02-25-2011, 01:24 AM #11
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Default Re: Anyone ever shine their 1W+ 445 on one of these?

It will expand pretty darn fast!

Here is a thermometer

YouTube - Blue Laser Exploding Thermometer

Here is a (non destructive - sorry!) video I made and uploaded

YouTube - Raising the temperature! Pointing 1.2W+ 445nm laser on bulb of spirit thermometer!
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Old 03-02-2011, 05:02 AM #12
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Default Re: Anyone ever shine their 1W+ 445 on one of these?

I never tried this cause i thought it would turn on ALL the other ones in a building too.
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Old 03-02-2011, 06:22 AM #13
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Default Re: Anyone ever shine their 1W+ 445 on one of these?

Unless there's a remote 'detonation' system in place, they won't pop on their own accord without external force or heat being applied to them.

They work by the red glass envelope bursting, releasing the water behind them. Unless it has electronic triggering, one of the heads triggering won't cause every other one to open.
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Old 03-02-2011, 03:24 PM #14
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Default Re: Anyone ever shine their 1W+ 445 on one of these?

Okay, ill try it sometime when I'm in a place that doing it wont cause that much harm.
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Old 03-03-2011, 04:55 AM #15
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Default Re: Anyone ever shine their 1W+ 445 on one of these?

THe ones we use have some sort of copper slug that pops off when enough heat is applied to them. It takes a LOT of heat, i.e. fire, to get them to pop.

Our apartment heads have a water supply which goes to an alarm box which is monitored- if one pops, the alarm sounds and the fire alarm goes off, and the fire department reponds. If you get caught triggering a false alarm, God help you... (fire department charges are expensive!).

Each one triggers individually, unlike the movies. And the heads are quite expensive!

-Dave
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Old 03-03-2011, 04:57 AM #16
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Default Re: Anyone ever shine their 1W+ 445 on one of these?

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THe ones we use have some sort of copper slug that pops off when enough heat is applied to them. It takes a LOT of heat, i.e. fire, to get them to pop.

Our apartment heads have a water supply which goes to an alarm box which is monitored- if one pops, the alarm sounds and the fire alarm goes off, and the fire department reponds. If you get caught triggering a false alarm, God help you... (fire department charges are expensive!).

Each one triggers individually, unlike the movies. And the heads are quite expensive!

-Dave
Nvm then. Im not gonna do it then if theres bills..
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