Honeywell FS20X Series User Manual page 8

FS20X Fire and Flame Detectors
Product Overview
The model FS20X™ fire and flame detector senses the ultraviolet and wideband
infrared radiant energy of blackbody particulate and molecular emissions generated
by both hydrocarbon and non-hydrocarbon flames and fires. The wideband spectral
radiant energy wavelengths sensed by its four sensors span approximately 0.185 to
0.26 microns and 0.7 microns to 3.5 microns.
The detector is designed and Factory Mutual approved for use in Class I, Division 1
and 2, Class II, and Class III; AEX d/Ex d IIC, and ATEX/IECEx Ex db IIC, Ex tb IIIC
hazardous locations.
Figure 1. FS20X detectors; aluminum enclosure (left), stainless steel enclosure (right)
The detector is available in a copper-free aluminum enclosure or a 316 stainless
steel enclosure (see Figure 1).
Figure 2. EN54 enclosure
The EN54 version is shown in Figure 2.
The detector's electro-optical electronics module is a replaceable hard black
enclosure of anodized aluminum that provides ruggedness, handling, ease of
installation, and protection against electromagnetic interference and radio-frequency
interference (EMI/RFI).
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