Installation Guide and Operating Manual // Model FS20X™ Series
Honeywell
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4.5
Field of View Restrictor
There are some unique and specialized applications that may require a restricted field of view in order to
prevent the Detector from alarming to a known (friendly) fire/flame source (such as a flare stack). The Model
FVR-01 Field-of-View Restrictor is easily modified in the field with a simple hack saw to obtain custom
Detector field-of-views for applications where specific narrow field-of-views are required. The Model FVR-01
Detector accessory has been developed specifically for these unique types of applications. Use of the
restrictor has not been certified to the EN54-10 standard.
4.6
Additional Performance Specifications
4.6.1 Flame Response Sensitivity
The following table provides FS20X typical indoor response times & distance to various fuels:
FS19X/FS20X MultiBand IR plus UV Detector
Fuel
Fire Size
Distance
Typical Response
Acetylene
12 in (0.30 m) Plume - Medium Flame
35 ft (10.7 m)
2 Seconds
Acetylene
10 - 12 in (0.25 - 0.30 m) Plume - Lazy Flame
40 ft (12.2 m)
< 2 Seconds
Diesel
6 in X 6 in (15.2 cm X 15.2 cm)
87 ft (26.5 m)
< 3 Seconds
Ethanol
12 in X 12 in (0.3 m X 0.3 m)
50 ft (15.2 m)
< 3 Seconds
Hydrogen
3/8 in dia. (9.5 mm) orifice, 32 in (0.8 m) Plume
85 ft (25.9 m)
< 3 Seconds
IPA
6 in X 6 in (15.2 cm X 15.2 cm)
87 ft (26.5 m)
< 3 Seconds
JP4
6 in X 6 in (15.2 cm X 15.2 cm)
75 ft (22.9 m)
< 3 Seconds
JP8
6 in X 6 in (15.2 cm X 15.2 cm)
87 ft (26.5 m)
3 Seconds
Methane
3/8 in dia. (9.5 mm) orifice, 32 in (0.8 m) Plume
70 ft (21.3 m)
< 3 Seconds
Methanol
12 in X 12 in (0.3 m X 0.3 m)
40 ft (12.2 m)
< 3 Seconds
n-Heptane
6 in X 6 in (15.2 cm X 15.2 cm)
87 ft (26.5 m)
< 3 Seconds
Silane
1/32 dia (0.8 mm) orifice, 12 in (0.3 m) Plume
30 ft (9.1 m)
< 2 Seconds
The following table provides FS20X typical outdoor response times & distance to various fuels:
FS19X/FS20X MultiBand IR plus UV Detector
Fuel
Fire Size
Distance
Typical Response
Acetylene
12 - 16 in (0.30 - 0.41 m) Plume - Large Flame
100 ft (30.5 m)
< 3 Seconds
Acetylene
12 in (0.30 m) Plume - Medium Flame
100 ft (30.5 m)
< 4 Seconds
Acetylene
10 - 12 in (0.25 - 0.30 m) Plume - Lazy Flame
90 ft (27.4 m)
< 3 Seconds
Diesel
12 in X 12 in (0.3 m X 0.3 m)
150 ft (45.7 m)
4 Seconds
Ethanol
12 in X 12 in (0.3 m X 0.3 m)
60 ft (18.3 m)
< 3 Seconds
Hydrogen
3/8 in dia. (9.5 mm) orifice, 32 in (0.8 m) Plume
75 ft (22.9 m)
< 3 Seconds
IPA
12 in X 12 in (0.3 m X 0.3 m)
150 ft (45.7 m)
< 3 Seconds
JP4
12 in X 12 in (0.3 m X 0.3 m)
150 ft (45.7 m)
< 4 Seconds
JP8
12 in X 12 in (0.3 m X 0.3 m)
150 ft (45.7 m)
< 4 Seconds
Methane
3/8 in dia. (9.5 mm) orifice, 32 in (0.8 m) Plume
60 ft (18.3 m)
2 Seconds
Methanol
12 in X 12 in (0.3 m X 0.3 m)
40 ft (12.2 m)
< 2 Seconds
n-Heptane
12 in X 12 in (0.3 m X 0.3 m)
200 ft (61.0 m)
< 4 Seconds
Silane
1/32 dia (0.8 mm) orifice, 12 in (0.3 m) Plume
50 ft (15.2 m)
< 3 Seconds
