The Rosemount 975MR Multi-Spectrum Infrared Flame Detector accurately analyzes the multi-spectral signals of hydrocarbon gas or liquid fires by utilizing four separate IR sensors. The 975MR detects fuel and gas fires at long distances. For example, this product will detect a 1 ft2 (0.1m2) gasoline pan fire at 300 ft (90 m). The 975MR also provides a high immunity to false alarms and enhanced overall coverage range.

Features

• Maximum flame detection range of up to 300 ft (90m)
• Six sensitivity levels, adapting to any application
• High speed response time under 50 msec (Exp./1 sec)
• Solar blind to help prevent false alarms
• Automatic and Manual 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

Detector 4"x 4.6"x 6.18"(101.6 x 117 x 157 mm)

Weight

Detector (stainless steel 316L) 6.3 lb (2.9 kg)
Detector (aluminum) 2.8 lb (1.3 kg)
Tilt mount 2.5 lb (1.1 kg)

Certifications/Approvals

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°C to +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)