Features built-in test, overheat sensing and discrimination for life-saving fire/explosion detection.
Collins Aerospace’s Kidde Dual Spectrum® fire/explosion sensors respond to explosive fires in milliseconds with excellent false alarm immunity. The sensors use a patented Dual Spectrum infrared detection concept and can detect energy levels present in a fire or explosion. Since non-fire situations seldom emit these energy signatures, our fire/explosion sensors are highly immune to false alarms.
Our Dual Spectrum infrared sensor Model PM-34CBEH is designed to detect fuel explosions and fires in enclosed spaces of armored personnel carriers such as the crew, engine and other compartments.
The PM-34CBEH contains a third infrared detector that provides fire signature information to the logic system, located in the control electronics. This provides discrimination capability that prevents false alarms from a kinetic energy or high-explosive anti-tank round penetration that does not result in an explosion or fire. The suppression system is triggered only when an explosion or fire event occurs.
Collins Aerospace has been involved in the development, testing and manufacturing of high-speed, optical explosion/fire-sensing and suppression systems since 1968.
SPECIFICATIONS | |
Detection threshold | 18 in. diameter DF-2 pan-fire at a distance of 60 in. explosive fireball that rows from 1 to 4 in. diameter instantaneously |
Explosive fire response time | 2 ms max. |
Heat detection threshold | 297°F (165°C) full shield of view above sensor temperature |
Optical field of view | 90° |
Weight | 0.6 lb. |
Temperate, Operational | -67°F (-55°C) to 257°F (125°C) |
Environmental | Qualified to the environmental requirements of MIL-PRF-62546C and ATPD-2404B |
FALSE ALARM IMMUNITY | |
STIMULUS | DISTANCE (in.) |
Sunlight | No Response |
Flashlight | No Response |
Indirect or reflected light | No Response |
Electronic flash | 9 |
Lit cigarette | 1 |
Bookmatch flare-up | 4 |
Red dome light | 1 |
Vehicle headlights | 6 |
Radiation heater (1000 watts) | 12 |
Oxy-acetylene flame (5/8 x 6” flame) | 12 |
Bright clothing | No Response |
Fluorescent light (40 watt) | No Response |
Chopped light (vent fans, hatch covers, etc.) | No Response |
Electric arc (1/2 in. 4000V) | 1 |
Incandescent lamp (100 watts – rough surface) | 2 |
Large wooden match flare-up | 4 |
Rifle flash (M16) | 2 |
Movie lights (625 watts) | 24 |
Arc welding (5/32" rod at 300A) | 12 |
The Dual Spectrum® automatic fire/explosion suppression system will not deliver a false alarm at the distances indicated above or greater. |
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