Explosion-Proof Smoke Detector

Pyrotector Model 30-3003 Explosion-Proof Smoke Detectors are sensitive yet rugged, state of the art protection device that are designed for classified areas in hazardous industrial and commercial locations to operate effectively with both slow smoldering and fast burning fires. The photoelectric smoke detector uses a solid state infrared emitting diode (IRED) and a light sensing photovoltaic cell arranged in a labyrinth assembly. The labyrinth permits free access to smoke but restricts external light. Because of its critical function to the operation of the detector, each IRED is selected with extreme care and is subjected to rigorous pre-production testing to ensure long-term reliability and performance.

During normal operation (no smoke), the detector samples the air approximately every four seconds for a period of less than one millisecond. The photo-voltaic smoke cell, which is placed at an angle to the pulsed invisible light source, is sensitive to the infrared light in the specified frequency emitted by the IRED light source and is designed to receive a signal only when the pulsed IRED source is activated. When smoke enters the chamber, the light from the IRED reflects off the smoke particles and reaches the photovoltaic smoke cell. When the amount of light reflected by smoke reaches the factory set threshold level, the smoke alarm circuit is actuated. The detector will respond to a slow smoldering fire when smoke in the chamber reaches the pre-set sensitivity setting, typically 2.3%.

• Rugged construction
• Self checking and compensating circuitry maintains desired sensitivity
• Heightened sensitivity triggered when smoke is increasing, but has not yet reached the preset sensitivity setting
• Form A (SPST) N.O. contacts for connection to alarm output circuitry
• SPST N.C. contacts for supervision of input power
• 2.3% fixed sensitivity

• CSA Certified
• ISO 9001