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.