Emerson Rosemount 975 - Page 34

Table 7-1: Rosemount 975 Models (continued)
Fuel Rosemount
975MR
Rosemount
975HR
Rosemount
975UF
Rosemount
975UR
Ethylene glycol 164 ft. (50 m) 23 ft. (7 m)
Butyl acrylate 246 ft. (75 m) 70 ft (21 m)
Vinyl acetate 246 ft. (75 m) 70 ft (21 m)
Flammable
adhesive
207 ft. (63 m) 70 ft (21 m)
Solvents 279 ft. (85 m) 70 ft (21 m)
Oil paint 207 ft. (63 m) 70 ft (21 m)
Jet fuel JP5 207 ft. (63 m) 70 ft (21 m)
Jet fuel A1 207 ft. (63 m) 70 ft (21 m)
Battery
(2)
279 ft. (85 m) 75 ft (23 m)
(1) Contact Emerson representative for guidance on detecting magnesium alloy.
(2) One battery cell.
Standard response time
Table 7-2: Rosemount 975 Models
Rosemount 975MR Rosemount 975HR Rosemount 975UF Rosemount 975UR
Typically <2 sec at 131 ft. (40 m)
10 sec at 300 ft (90 m)
Typically 5 sec at 93 ft (28 m)
Ultra fast response time
Table 7-3: Rosemount 975 Models
Rosemount 975MR Rosemount 975HR Rosemount 975UF Rosemount 975UR
Typically <1 sec at 100 ft (30 m) 20 msec for flash fire at 10 ft. (3 m)
High speed response time
Table 7-4: Rosemount 975 Models
Rosemount 975MR Rosemount 975HR Rosemount 975UF Rosemount 975UR
50 msec for 1 ft
2
(0.1 m
2
) diameter sphere LPG-
air mixture explosion at 66 ft. (20 m)
50 msec for 1 ft
2
(0.1 m
2
) diameter sphere
LPG-air mixture explosion at 33 ft. (10 m)
Sensitivity ranges
Note
All distances relate to detection of a 1 ft
2
(0.1 m
2
) n-heptane fire.
Specifications Manual
September2023 00809-1400-4975
34 Emerson.com