Tear Gas
- Thread starter Gadrin
- Start date
Yes. It's a particulate vapor. Steam can also set off a smoke alarm.
Some smoke/fire alarms work by particulates interrupting a light beam.
Some use an IR sensor for 300°F+ degree air.
Some use a 250°F melting wax or plastic breaker; when it ceases to hold the contacts apart, a circuit is closed and alarm triggered. (This is also used for sprinklers.)
A few have detectors for CO and CO2.
Only the light interruption should be set off by most tear gasses...
Some use an IR sensor for 300°F+ degree air.
Some use a 250°F melting wax or plastic breaker; when it ceases to hold the contacts apart, a circuit is closed and alarm triggered. (This is also used for sprinklers.)
A few have detectors for CO and CO2.
Only the light interruption should be set off by most tear gasses...
so it's a "depends" type of situation.
Andrew Boulton
The Adminator
AIUI the actual grenade gets very hot.
right, back in TL6 earth I'd see police standoffs result in fires on the news, not so much anymore...haven't seen a good gassing in a while. last I remember was the SLA/Hearst thingy in Los Angeles (well, minus Hearst), but I really don't keep track o'those thingys, like Waco and RR.
Most of the one you can buy in a store in the U.S. (i.e. home smoke detectors) detect particulates, as far as I'm aware. Although, Carbon Monoxide detectors are becoming more common due to new laws. Those are probably the 'cheap' ones.
The CS gas from tear gas grenades is hot, and the CS particles 'ride' the smoke, usually an HX smoke compound. It should set off any smoke alarm, as the gas is only part of the payload.
Note also that in the case of hot smoke weapons such as this the smoke will block IR and Thermal imaging to some extent. About the best thing for looking through hot smoke is radar or echolocation.
Note also that in the case of hot smoke weapons such as this the smoke will block IR and Thermal imaging to some extent. About the best thing for looking through hot smoke is radar or echolocation.
Sometimes the unexpected can set off a "smoke detector". Use your Google-fu and look up "Durian". It is a fruit from the Philippines, which out-gasses so strongly that commercial passenger airlines will typically refuse to carry it because the out-gassing sets off the optical type detectors.
This would be a good red-herring when the smoke detectors in the hold go off and you have primed the PCs for sabotage…
Security Officer: Where’s the fire? Do I see smoke?
Engineer: The alarm is coming from this shipment of fresh fruit! No fire, no smoke; just one hell of a smell!
Load Master: What do you mean it’s the fruit?
Pilot: Say again, it sound like you said the fruit set off the fire alarms.
This would be a good red-herring when the smoke detectors in the hold go off and you have primed the PCs for sabotage…
Security Officer: Where’s the fire? Do I see smoke?
Engineer: The alarm is coming from this shipment of fresh fruit! No fire, no smoke; just one hell of a smell!
Load Master: What do you mean it’s the fruit?
Pilot: Say again, it sound like you said the fruit set off the fire alarms.
Fritz_Brown
Super Moderator
Most modern smoke detectors work on the optical principle above, or on ionization. The optical detectors are for smoldering fires that put off real smoke. The ionization detectors are supposed to be better for kitchens because they don't give off false alarms every time you scorch something in the oven. They detect specific particles from hot fires that are burning full out (and don't produce as much smoke).
Either one of those would likely be set off by a CS grenade. Most of the other systems mentioned earlier would be heat detectors, and are usually for suppression systems, rather than for getting folks to clear a house.
And, yes, durian are terrible. All the hotels in Thailand forbid them in any form. If you can get just the innards, though (pre-rinded? in a store), they don't smell nearly as much and don't taste too bad. They didn't taste good enough to me to run the whole smell gauntlet thing, though.
Either one of those would likely be set off by a CS grenade. Most of the other systems mentioned earlier would be heat detectors, and are usually for suppression systems, rather than for getting folks to clear a house.
And, yes, durian are terrible. All the hotels in Thailand forbid them in any form. If you can get just the innards, though (pre-rinded? in a store), they don't smell nearly as much and don't taste too bad. They didn't taste good enough to me to run the whole smell gauntlet thing, though.
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