Fire Sentry SS4-AS
The Fire Sentry SS4-AS processes UV, IR and Visible (VIS) spectral ranges from
ruggedized solar-blind UV, “Quantum-Effect” IR and VIS sensors correspondingly.
It is optimized for detection of hydrogen, ethanol, methanol and methane (natural
gas) fires and like the other detectors in its family, it responds to Type A, B and C
flaming fires.
Fire Sentry SS4-A and SS4-AS Features:
- Multi-SpectrumTM: senses ultraviolet, visible and Wide Band InfraredTM
- Built-in test for optical “through the lens” testing
- False alarm immunity
- Detects hydrocarbon and non-hydrocarbon based fires
- Wide field-of-view and solar-blind
- Adjustable detector sensitivity
- Microprocessor based algorithms: FirePicTM, SnapshotTM and Tri-Mode PlotTM
- Wide temperature range of operation
- Compatible with standard approved fire alarm panels
- Explosion-proof housing
- Time programmable alarm verification
Applications include:
- Petrochemical Facilities and Refineries
- Co-Generation Plants
- Aircraft Hangars
- Silane and Hydrogen Gas Storage
- Gas Turbines & Power Plants
- Gas Compressor Stations
- Warehouses
The field of view for the Fire
Sentry SS4 detectors is the
widest in the industry with a 120°
cone of vision. This means more
hazard area can be covered by
each detector. Greater sensitivity
also increases the volume
covered by each detector, up to
four times more than some other
detectors.
Using sophisticated
microprocessor signal processing
algorithms, false alarm rejection
is maximized – with virtual
immunity to false alarms from arc
welding, corona discharge and
other common non-fire sources.
Operation
The Fire Sentry SS4 detectors operate from standard 24 Volt DC power and
interfaces to approved fire alarm panels or standard PLC’s. When power is
applied, a self-test is performed and the fault relay resets to show no faults.
The front LED lights flash every ten seconds to indicate power is on.
The continuous spectral data stream of information from the sensor array is
analyzed by the microprocessor. Upon alarm, the detector activates the
alarm relay and stores all the pre-fire spectral data in non-volatile memory for
retrieval and evaluation. This Fire PicTM data can be used to postulate the
cause of the fire.
As part of the FS2000TM System, the SS4 family of detectors communicate
with CM1-A Controller via a four wire bi-directional RS-485 FireBusTM.
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