Appendix B Specifications; General Specifications; Electrical Specifications - Emerson Rosemount 935 Reference Manual

Reference Manual
00809-0100-4035
B Specifications
B.1

General specifications

Detected gases: C1 - C8 selective gases
Detection distance range:
Table B-1: Model Numbers and Installation Distances
Model
number
935
935
935
935
Response time:
Spectral response:
Sensitivity range:
Field of view:
Alignment tolerance:
Drift:
Minimum detectable gas
volume:
Temperature range:
Immunity to false alarm:
B.2

Electrical specifications

Operating voltage
18-32 Vdc
Rosemount 935
Table B-1
Detector Source
R1F00XXXX T1FXXXXXX
R1F00XXXX T2FXXXXXX
R1F00XXXX T3FXXXXXX
R1F00XXXX T4FXXXXXX
3 sec to T90
2.0 - 3.0 micron
Gas 1
Gas 2
Gas 3
Line of sight
±0.5 °
±7.5% of the reading or ±4% of the full scale (whichever is
greater)
0.15 LEL.m
-67 °F (-55 °C) to 149 °F (65 °C)
Does not produce false alarm and is not influenced by
solar radiation, hydrocarbon flames, and other external
infrared (IR) radiation sources.
Minimum installation
distance
23 ft. (7 m)
50 ft. (15 m)
115 ft. (35 m)
265 ft. (80 m)
Full scale
LEL.m
Methane 5
Propane 5
Ethylene 8
Specifications
May 2022
Maximum installation
distance
66 ft. (20 m)
132 ft. (40 m)
330 ft. (100 m)
660 ft. (200 m)
Warning Alarm
LEL.m LEL.m
1 3
1 3
1.6 4.8
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