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975UF Ultra Fast Ultraviolet Infrared Flame Detector

Brand: Rosemount
The Rosemount 975UF ultra fast ultraviolet infrared flame detector can detect hydrocarbon-based fuel and gas fires, hydroxyl and hydrogen fires, as well as metal and inorganic fires. This UV/IR flame detector senses radiant energy in the short wave section of both the ultraviolet and infrared portions of the electromagnetic spectrum.

The signals from both sensors are analyzed for frequency, intensity and duration. Simultaneous detection of radiant energy in both the UV and IR sensors triggers an alarm signal. The UV sensor incorporates a special logic circuit that helps prevent false alarms caused by solar radiation.
Features
  • UV/IR dual-sensor
  • High-speed response - 20 msec to flash fire
  • Solar blind
  • Automatic 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
  • Analog output for fast detection
  • 0-20 mA (stepped)
  • HART® Protocol for maintenance and asset management
  • High reliability - MTBF - minimum 150,000 hours
  • User programmable via HART® or RS-485
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The Rosemount 975UF ultra fast ultraviolet infrared flame detector can detect hydrocarbon-based fuel and gas fires, hydroxyl and hydrogen fires, as well as metal and inorganic fires. This UV/IR flame detector senses radiant energy in the short wave section of both the ultraviolet and infrared portions of the electromagnetic spectrum.

The signals from both sensors are analyzed for frequency, intensity and duration. Simultaneous detection of radiant energy in both the UV and IR sensors triggers an alarm signal. The UV sensor incorporates a special logic circuit that helps prevent false alarms caused by solar radiation.
Features
  • UV/IR dual-sensor
  • High-speed response - 20 msec to flash fire
  • Solar blind
  • Automatic 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
  • Analog output for fast detection
  • 0-20 mA (stepped)
  • HART® Protocol for maintenance and asset management
  • High reliability - MTBF - minimum 150,000 hours
  • User programmable via HART® or RS-485

Specifications

Brand

Approvals & Certifications

  • SIL Certification

Approvals & Certifications

  • ATEX: Ex II 2 GD, Ex d E IIC T5 Gb Ex d E IIC T4 Gb Ex Tb IIIC T96° C Db Ex Tb IIIC T106° C Db (-55° C ≤ Ta ≤ 75° C) (-55° C ≤ Ta ≤ 85° C)
  • CSA: Class I, Div. 1, Groups B, C, D Class II/III, Div. 1, Groups E, F, G
  • DNV Marine
  • FM/FMC: Class I, Div. 1, Groups B, C, D Class II/III, Div. 1, Groups E, F, G
  • IECEx

Communication

  • HART
  • RS-485 Modbus

Enclosure Finish

  • Electro-Polished
  • Red Epoxy Enamel Finish (Not Available in FM Version)

Enclosure, Body Material

  • 316L Stainless Steel
  • Heavy Duty Copper-Free Aluminum (Less than 1 %)

Environmental Protection

  • IP66
  • IP67
  • NEMA 250 6P

Materials of Construction

  • Mounting: 316 Stainless Steel with Electro Polish Finish

Measuring Range

  • Detection Rang: 6 to 66 Ft (1.8 to 20 metres)

Operating Temperature

  • -55° to 75° C (-67° to 167° F)
  • -55° to 85° C (-67° to 185° F) Option

Operating Voltages

  • 24 Vdc Nominal (18-32 Vdc)

Storage Temperature

  • -55° to 85° C (-65° to 185° F)