



Rosemount™ 975HR Multi-Spectrum Infrared Hydrogen Flame Detector
The Rosemount 975HR Multi-Spectrum Infrared Hydrogen Flame Detector is specifically designed for the detection of hydrocarbon and hydrogen flames. It detects hydrocarbon-based fuel and gas fires at long distances with a high immunity to false alarms. The Rosemount 975HR Flame Detector is a durable and weather resistant hydrogen flame detector. This flame detector includes a heated window to eliminate condensation and icing, HART™, lower power requirements and a compact lighter design.
Features
Multi spectrum design for detection of hydrocarbons and hydrogen flames with high false alarm immunity
Six sensitivity levels, adapting to any application
High speed response time under 20 msec
Solar blind to help prevent false alarms
Adjustable infrared built-in test (BIT) to assure continued reliable operation
Heated window for operation in harsh weather conditions (snow, ice, condensation)
Relays (3) for Alarm, Fault and Auxiliary
0–20 mA (stepped)
HART™ Protocol for maintenance and asset management
High Reliability - MTBF - minimum 150,000 hours
5-Year Warranty
User programmable via HART® 7 or RS-485 Modbus®
Specifications
Communication Protocol
Optional HART™ communications on the 0-20 mA analog current (FSK) - used for maintenance, configuration changes and asset management, available in mA source output wiring options. RS-485 Modbus compatible communication link that can be used in computer controlled installations
Ambient Temperature
Operating & Storage: -76 °F to +185 °F (-60 °C to +85 °C)
Enclosure Rating
Stainless Steel 316L with electro polish finish
Heavy duty copper free aluminum (less than 1%), polyurethane painted
Mounting
Stainless Steel 316L with electro polish finish
Dimensions
Flame Detector 4"x 4.6"x 6.18"(101.6 x 117 x 157 mm)
Weight
Flame Detector (stainless steel 316L) 6.3 lb (2.9 kg)
Flame Detector (aluminum) 2.8 lb (1.3 kg)
Tilt mount 2.5 lb (1.1 kg)
Certifications/Approvals
strong>ATEX and IECEx:
Ex II 2 G D
Ex db eb op is IIC T4 Gb
Ex tb op is IIIC T110 °C Db
(Ta -50°Cto+85°C) IP66/68
FM/FMC
Class I, Division 1, Groups B, C, and D, T4A
Class II, III, Division 1, Groups E, F, and G, T4A
Class I, Division 2, Groups A, B, C, and D, T4
Ta = -50°C to +85°C
Type 6P, IP66/68 2 m for 45 minutes
CSA/US:
Class I, Division 1, Groups B, C, and D, T4
Class II, III, Division 1, Groups E, F, and G, T4
Class I, Division 2, Groups A, B, C, and D, T4
Ta = -50 °C to +85 °C
Type 6P; IP 66/68 2 m for 45 minutes
TR CU (EAC):
1 Ex db eb op is IIC T4 Gb X
Ex tb op is IIIC T110°C Db X
(–55°C Ta +85°C)
Performance:
EN 54-10 (VdS)
FM 3260
Reliability:
Designed to meet IEC 61508 - SIL 3 (TÜV)
Marine:
MED "Wheelmark" (DNV)
Product Data Sheet: Flame Simulator: FS-HR-975 | Rosemount

