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Automated fire protection systems also have applications in any manufacturing or research
facility where the potential of fire may be low to moderate but the losses due to a fire would be
high.
DETECTOR SENSITIVITY
SPECTRAL SENSITIVITY RANGE
The UV fire detector responds to radiation wavelengths of 185 to 260 nanometres (1850 to 2600
angstroms). Figure 5 illustrates the range of sensitivity and compares this range to other forms of
radiation. Note that UV radiation reaching the earth from the sun does not extend into the
sensitivity range of the detector. Nor does radiation from normal artificial lighting, such as
fluorescent, mercury vapor and incandescent lamps.
Figure 5 - Various Spectral Distributions
NOTE
Some mercury vapor lamps can operate for extended periods with cracked or damaged
envelopes and will then emit UV radiation in the range of the detector. Remove defective
mercury vapor lamps from service.