Rosemount Analytical 975HR Specifications
Rosemount 975HR Multi-spectrum Infrared Hydrogen Flame Detector
FGD-PDS-975HR-Multi-spectrum-Infrared-Hydrogen-Flame-Detector
Product Data Sheet
January 2018
Rosemount
TM
975HR
Multi-spectrum Infrared Hydrogen Flame Detector
The RosemountTM 975HR Multi-spectrum
Infrared Hydrogen Flame Detector is specifically
designed for detection of hydrocarbon and
hydrogen flames. It detects hydrocarbonbased fuel and gas fires at long distances with
the highest immunity to false alarms. The
Rosemount 975HR can detect a gasoline pan fire
at 65 m (215 ft) or a hydrogen flame at 38 m
(125 ft) in less than five seconds.
The Rosemount 975HR is the most durable and weather
resistant ame detector on the market. Its features include a
heated window to eliminate condensation and icing, HART®,
lower power requirements and a compact lighter design.
Rosemount 975HR Multi-spectrum Infrared Hydrogen
Flame Detector
Features & Benefits
Multi spectrum design - for long distance detection of
hydrocarbons and hydrogen ames
High false alarm immunity
Sensitivity selection - to ensure no zone crossover detection
Automatic and manual built-in-test (BIT) - to assure
continued reliable operation
Heated window - for operation in harsh weather conditions
(snow, ice, condensation)
Multiple output options for maximum exibility and
compatibility
• Relays (3) for alarm, fault and auxiliary
• 0–20 mA (stepped)
®
• HART
• RS-485, Modbus compatible
High reliability - MTBF - minimum 150,000 hours
Approved to Safety Integrity Level 2 (SIL2 – TÜV)
5-Year Warranty
User Programmable via HART or RS-485
-protocol for maintenance and asset
management
Applications
Oil and gas - offshore and onsure process facilities
Chemical plants
Petrochemicals plants
Storage tank farms
Aircraft hangars
Power generation facilities
Pharmaceutical industry
Automotive
Explosives and ammunition
Waste disposal facilities
Hydrogen fuel cell industry
Rosemount 975HR Multi-spectrum Infrared Hydrogen Flame Detector
Specifications
Table 1 - Rosemount 975HR Multi-spectrum Infrared Hydrogen Flame Detector
General specifications
Spectral response Multi IR bands
Detection range
(at highest sensitivity setting for
0.1 m2 (1 ft2) pan re)
Response time Typically 5 s
Adjustable time delay Up to 30 s
Sensitivity ranges 4 sensitive ranges for 0.1 m2 (1 ft2) n-heptane pan re from 15 m (50 ft) to 65 m (215 ft)
Field of view Horizontal 67°, vertical 70° for gasoline
Built-in-test (BIT) Automatic (and manual)
Temperature range Operating: -55 ˚C to +75 ˚C (-67 ˚F to +167 ˚F)
Humidity Up to 95 % non-condensing (withstands up to 100 % relative humidity for short periods)
Heated optics To eliminate condensation and icing on the window
Electrical specifications
Operating voltage 24 Vdc nominal (18–32 Vdc)
Power consumption Standby: Max. 90 mA (110 mA with heated window)
Cable entries 2 x ¾ in. - 14 NPT conduits or 2 x M25 x 1.5 mm ISO
Wiring
Electrical input protection
Electromagnetic compatibility
Electrical interface
Outputs
Relays Alarm, fault, and auxiliary
0–20 mA (stepped) Sink (source option) conguration
HART® Protocol Optional HART communications on the 0–20 mA analog current (FSK) - used for maintenance, conguration changes
RS-485
Mechanical Specifications
Materials Stainless steel 316L with electro polish nish
Mounting Stainless steel 316L with electro polish nish
Dimensions Detector 101.5 x 117 x 157 mm (4 x 4.6 x 6.18 in.)
Weight Detector (stainless steel 316L) 2.8 kg (6.1 lb)
Environmental standards Meets MIL-STD-810C for humidity, salt and fog, vibration, mechanical shock, high temp, low temp
Water and dust IP66 and IP67 per EN 60529, NEMA 250 6P
Fuel m / ft Fuel m / ft Fuel m / ft
n-Heptane
Gasoline
Diesel fuel
JP5
Kerosene
*0.75 m (30 in.) high, 0.25 m (30 in.) width plume re
**0.5 m (25 in.) high, 0.2 m (8 in.) width plume re
Horizontal 80°, vertical 80° for hydrogen
Option: -55 ˚C to +85 ˚C (-67 ˚F to +185 ˚F)
Storage: -55 ˚C to +85 ˚C (-67 ˚F to +185 ˚F)
Alarm: Max. 130 mA (160 mA with heated window)
12–22 AWG (0.3 mm2–2.5 mm2)
According to MIL-STD-1275B
EMI/RFI protected to EN 61326-3 and EN 61000-6-3
The detector includes twelve (12) terminals with ve (5) wiring options (factory set).
SPST volt-free contacts rated 2 A at 30 Vdc
Fault: 0 +1 mA
BIT fault: 2 mA ±10 %
and asset management, available in mA source output wiring options
RS-485 Modbus compatible communication link that can be used in computer controlled installations
Tilt mount 1.0 kg (2.2 lb)
65 / 215
65 / 215
45 / 150
45 / 150
45 / 150
Ethanol
Methanol
IPA (isopropyl alcohol)
Hydrogen*
Methane*
Normal: 4 mA ±10 %
Warning: 16 mA ±5 %
40 / 135
35 / 115
40 / 135
38 / 125
45 / 150
Alarm: 20 mA ±5 %
Resistance loop: 100–600 Ω
LPG*
Polypropylene pellets
Ammonia**
Silane**
Ofce Paper
45 / 150
35 / 115
18 / 60
7 / 2
25 / 82
January 2018
2 www.Emerson.com/FlameGasDetection
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