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975UR Ultraviolet Infrared Flame Detector

Brand: Rosemount
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Rosemount 975UR UV/IR flame detector senses radiant energy in the short wave section of both the ultraviolet and infrared portions of the electromagnetic spectrum and can detect hydrocarbon-based fuel and gas fires. 

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
  • 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
  • RS-485, Modbus Compatible
  • High Reliability - MTBF - minimum 150,000 hours
  • Approved to Safety Integrity Level 2 (SIL2 - TÜV)
  • User Programmable via HART® or RS-485
Rosemount 975UR UV/IR flame detector senses radiant energy in the short wave section of both the ultraviolet and infrared portions of the electromagnetic spectrum and can detect hydrocarbon-based fuel and gas fires. 

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
  • 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
  • RS-485, Modbus Compatible
  • High Reliability - MTBF - minimum 150,000 hours
  • Approved to Safety Integrity Level 2 (SIL2 - TÜV)
  • User Programmable via HART® or RS-485
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Specifications

Brand

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

Approvals & Certifications

  • SIL Certification

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: 33 to 93 Ft (10 to 28 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)
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