IR3 Flame Detectors

The Sierra Monitor 3520-04 (Spectrex SharpEye Triple IR (IR3) Optical Flame Detector 20/20SI) is a self-contained, triple-spectrum flame detector. The optical sensors and filters have been carefully selected to ensure the greatest degree of spectral matching to the radiant energy emissions of fire, and the lowest degree of matching to non-fire stimuli.

The patented Triple IR (IR3) circuit design scans for oscillating IR radiation (1 to 10 Hz) in the spectral bands ranging from 4.0 to 5.0 microns. This highly advanced detector uses programmable algorithms which check the ratio and correlation of data received by the three sensors.

The microprocessor design allows for unique field programmability not found in similar detectors, making the detector highly immune to false alarms. The 3520-04 has Modbus compatible RS-232 output and sealed electronics and sensor section to ensure protection from the environment during installation.

The detector has applications in a wide range of industrial and commercial facilities, where the threat of accidental fire involves hydrocarbon fuels, such as gasoline, kerosene, diesel fuel, aviation jet fuels like JP-4, JP-5, JP-8, hydraulic fluids, paints and solvents, hydrocarbon gases like ethylene and polyethylene, natural gas (LNG), town gas, liquefied petroleum gas (LPG), methane, ethane, propane, etc.

The patented Triple IR design offers two to three times the detection distance of any conventional IR or UV/IR detector.

The Spectrex 20/20SI has CSFM Approval.