Dual Spectrum® fire/explosion sensors respond to explosive fires in milliseconds with excellent false-alarm immunity. The sensors utilize 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.
Dual Spectrum® fire/explosion sensors respond to explosive fires in milliseconds with excellent false-alarm immunity. The sensors utilize 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.
Dual Spectrum Model PM-34CSBEH 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-34CSBEH contains a third infrared detector that provides fire signature information to the logic system, located in the Control Electronics. This provides discrimination capability which prevents false alarms from a Kinetic Energy (KE), or High Explosive Anti-Tank (HEAT), round penetration that does not result in an explosion or fire. The suppression system is triggered only when an explosion or fire event occurs.
During normal operation between the Control Electronics and the PM-34CSBEH, the operator can initiate built-in-test circuitry that monitors detectors, electronics and sensor window contamination. The sensor integrates radiometric heat detection circuitry, which monitors its entire field of view for overheat conditions above the heat detection threshold. Radiometric heat sensing remains operational even with the presence of thick layers of contamination, such as oil and dirt.
PERFORMANCE SPECIFICATIONS | |
Detection Threshold | 18” diameter DF-2 pan-fire at a distance of 60” |
Explosive Fireball that grows from 1” to 4’ diameter instantaneously | |
Explosive Fire Response Time | 2 milliseconds, maximum |
Heat Detection Threshold | Factory set, usually 165°C full field above case temperature |
Optical Field of View | 90° |
Weight | 0.6 pounds |
Temperature, Operational | -67° F (-55° C) to +257° F (125° C) |
Environmental | Qualified to vibration, shock, and humidity requirements of MIL-PRF-62546 for combat vehicle conditions |
FALSE ALARM IMMUNITY | |
Sunlight | No Response |
Flashlight | No Response |
Indirect or Reflected Light | No Response |
Electronic Flash | 12 inches |
Lit Cigarette | 1 inch |
Bookmatch Flare-up | 4 inches |
Red Dome Light | 1 inch |
Vehicle Headlights | 6 inches |
Radiation Heater (1000 Watts) | 12 inches |
Oxy-Acetylene Flame (5/8 x 6” Flame) | 12 inches |
Bright Colored 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 inch |
Incandescent Lamp (75 Watts — Rough Surface) | 2 inches |
Large Wooden Match Flare-up | 4 inches |
Rifle Flash (M16) | 2 inches |
Vehicle IR Lights | 12 inches |
Movie Lights (625 Watts) | 24 inches |
Arc Welding (Steel Rod, 0.5” arc) | 30 inches |
The Dual Spectrum® Automatic Fire Sensing and Suppression System will not false alarm at the distances indicated above, or greater. |
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