Rosemount™ 975UF Ultra Fast Ultraviolet Infrared Flame Detector

Rosemount

Rosemount™ 975UF Ultra Fast Ultraviolet Infrared Flame Detector

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.

Specifications

Time Constant / Response
Typically 3 s. High speed 20 msec to flash fire
Ambient Temperature
Operating: -67 °F to +167 °F (-55 °C to +75 °C)
Option: -67 °F to +185 °F (-55 °C to +85 °C)
Storage: -67 °F to +185 °F (-55 °C to +85 °C)
Power Supply
Standby: Max. 90 mA (110 mA with heated window)
Alarm: Max. 130 mA (160 mA with heated window)
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
Enclosure Rating
Stainless Steel 316L with electro polish finish
Heavy duty copper free aluminum (less than 1 %), red epoxy enamel finish (not available in FM version)
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) 6.1 lb (2.8 kg)
Detector (aluminum) 2.8 lb (1.3 kg)
Tilt mount 2.2 lb (1.0 kg)
Certifications/Approvals
ATEX and IECEx

Ex II 2 G D
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)
Ex tD A21 IP66/X7 T 95 ?C
Certifications/Approvals
FM/FMC/CSA

Class I Div. 1, Groups B, C, & D
Class II/III Div.1, Groups E, F & G

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
  • 5 year warranty
  • User programmable via HART® or RS-485

Documents & Drawings

Training & Services