Honeywell SS4s User Manual
Product Notice
SS4
FS20X
FSL100
Hazardous locations
C1D1
C1D1
C1D2
FOV (Field of Vision)
120 Degree
90 Degree
90 Degree
Distance (on axis)
* Switch Selectable
*Up to 60 ft
*Up to 200 ft
Up to 80 ft
*Up to 45 ft
*Up to 150 ft
*Up to 30 ft
*Up to 100 ft
*Up to 15 ft
*Up to 50 ft
UV/IR Detectors
SS4 Series
FS20x
Description / Notes
SS4-A2
FS20X-211-21-2
DUAL IR/UV FLAME DETECTOR Copper-Free Aluminum Encl. with
(2) ¾” NPT entries, FM, cFM for Class I, Division 1, Groups A, B, C,
D; Class II, Division 1, Groups E, F, G; Class III
SS4-A2-C-E*
FS20X-211-23-3
DUAL IR/UV FLAME DETECTOR Copper-Free Aluminum Encl. with
(2) M25 entries, FM, cFM, ATEX, IECEx for Class I, Zone 1
SS4-A2-C-E-H*
FS20X-212-23-3
Dual IR/UV copper-free aluminum encl. with (2) M25 entries,
ATEX/IECEx, HART module factory installed
SS4-A2-C-E-M*
FS20X-211-23-3
DUAL IR/UV FLAME DETECTOR Copper-Free Aluminum Encl. with
(2) M25 entries, FM, cFM, ATEX, IECEx for Class I, Zone 1
SS4-A2-CSS-E*
FS20X-211-24-3
DUAL IR/UV FLAME DETECTOR Stainless Steel Encl. with (2) M25
entries, FM, cFM, ATEX, IECEx for Class I, Zone 1
End of Life Notification
EOL: SS4 Flame Detectors
Regions Affected: Global
Dear Customers and Colleagues
Effective July 4, 2020, the SS4 Flame Detectors will no longer be available. As an alternative solution please
refer to the model FS20X Multi-Spectrum (UV/IR/VIS) Fire and Flame Detector or the FSL100 Flame
Detector product lines.
End of support for the SS4 Flame Detector: December 31, 2025.
As the FS20X and the FSL100 Flame detector are not a complete 1-for-1 solution, extra care should be
taken in calculating of the coverage area to determine the number of flame detectors that are required.
Note that FoV is a ratio calculation; the angle at which the detection distance falls to set percentage of the
on axis range (FM3260 = 50%, EN541-0 =70%). Hence, a longer range flame detector such as FS20X may
cover a greater solid area than a shorter range detector such as SS4. If in doubt, seek advice from your
local representative. More information related to the functionality of the FS20X and FSL100 as compared
to the SS4 are contained in the below table:
Alternative part numbers
BULLETIN NUMBER: 2017048 10/1/19
Product Notice
SS4-A2-CSS-E-H*
FS20X-212-24-3
Dual IR/UV 316 stainless steel encl. with (2) M25 entries,
ATEX/IECEx, HART module factory installed
SS4-A2-CSS-E-M*
FS20X-211-24-3
DUAL IR/UV FLAME DETECTOR Stainless Steel Encl. with (2) M25
entries, FM, cFM, ATEX, IECEx for Class I, Zone 1
SS4-A2-H
FS20X-212-21-2
Dual IR/UV copper-free aluminum encl. with (2) 3/4 in. entries,
FM/cFM, HART module factory installed
SS4-A2-M
FS20X-211-21-2
DUAL IR/UV FLAME DETECTOR Copper-Free Aluminum Encl. with
(2) ¾” NPT entries, FM, cFM for Class I, Division 1, Groups A, B, C,
D; Class II, Division 1, Groups E, F, G; Class III
SS4-A2-SS
FS20X-211-22-2
DUAL IR/UV FLAME DETECTOR Stainless Steel Encl. with (2) ¾”NPT
entries, FM, cFM for Class I, Division 1, Groups A, B, C, D; Class II,
Division 1, Groups E, F, G; Class III
SS4-A2-SS-H
FS20X-212-22-2
Dual IR/UV 316 stainless steel encl. with (2) 3/4 in. entries,
FM/cFM, HART module factory installed
SS4-A2-SS-M
FS20X-211-22-2
DUAL IR/UV FLAME DETECTOR Stainless Steel Encl. with (2) ¾”NPT
entries, FM, cFM for Class I, Division 1, Groups A, B, C, D; Class II,
Division 1, Groups E, F, G; Class III
SS4-AS2
FS20X-211-21-2
DUAL IR/UV FLAME DETECTOR Copper-Free Aluminum Encl. with
(2) ¾” NPT entries, FM, cFM for Class I, Division 1, Groups A, B, C,
D; Class II, Division 1, Groups E, F, G; Class III
SS4-AS2-C-E*
FS20X-211-23-3
DUAL IR/UV FLAME DETECTOR Copper-Free Aluminum Encl. with
(2) M25 entries, FM, cFM, ATEX, IECEx for Class I, Zone 1
SS4-AS2-C-E-H*
FS20X-212-23-3
Dual IR/UV copper-free aluminum encl. with (2) M25 entries,
ATEX/IECEx, HART module factory installed
SS4-AS2-C-E-M*
FS20X-211-23-3
DUAL IR/UV FLAME DETECTOR Copper-Free Aluminum Encl. with
(2) M25 entries, FM, cFM, ATEX, IECEx for Class I, Zone 1
SS4-AS2-CSS-E*
FS20X-211-24-3
DUAL IR/UV FLAME DETECTOR Stainless Steel Encl. with (2) M25
entries, FM, cFM, ATEX, IECEx for Class I, Zone 1
SS4-AS2-CSS-E-H*
FS20X-212-24-3
Dual IR/UV 316 stainless steel encl. with (2) M25 entries,
ATEX/IECEx, HART module factory installed
SS4-AS2-CSS-E-M*
FS20X-211-24-3
DUAL IR/UV FLAME DETECTOR Stainless Steel Encl. with (2) M25
entries, FM, cFM, ATEX, IECEx for Class I, Zone 1
SS4-AS2-H
FS20X-212-21-2
Dual IR/UV copper-free aluminum encl. with (2) 3/4 in. entries,
FM/cFM, HART module factory installed
SS4-AS2-M
FS20X-211-21-2
DUAL IR/UV FLAME DETECTOR Copper-Free Aluminum Encl. with
(2) ¾” NPT entries, FM, cFM for Class I, Division 1, Groups A, B, C,
D; Class II, Division 1, Groups E, F, G; Class III
SS4-AS2-SS
FS20X-211-22-2
DUAL IR/UV FLAME DETECTOR Stainless Steel Encl. with (2) ¾”NPT
entries, FM, cFM for Class I, Division 1, Groups A, B, C, D; Class II,
Division 1, Groups E, F, G; Class III
BULLETIN NUMBER: 2017048 10/1/19
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