Fireye 45UV5-1101

Product Name: Fireye 45UV5-1101 — UV/IR Flame Detector (Dual-Spectrum Flame Scanner)

Product Overview: Dual-spectrum (UV + IR) flame detection sensor from Fireye. Combines ultraviolet and infrared sensing for superior false-alarm rejection in challenging environments (e.g., welding, sunlight, hot surfaces).

Category:
Description

Technical Specifications:

Parameter Value
Detection Type Dual: UV (185–260nm) + IR (4.3μm CO₂ band)
Wavelength (UV) 185–260 nm (solar-blind)
Wavelength (IR) 4.3 μm (CO₂ absorption band)
Response Time <3 seconds
Viewing Angle 5° (wide) or 3° (narrow — verify variant)
Sensor Type UV phototube + IR thermopile/pyroelectric
Housing Material Stainless Steel 316L
Lens Material Sapphire (UV) + Germanium (IR)
Operating Temp (ambient) -40°C to +70°C
Process Temp (lens) Up to 300°C (with purge)
Electrical Output Relay contact (SPDT), 5A @ 250VAC
Power Supply 24VDC or 120/240VAC
Mounting 45UV = 1-1/2″ NPT thread mount
Protection Rating IP66/IP67 (with purge)
Certifications FM, CSA, ATEX Zone 1/2, IECEx, SIL2
Model Suffix 1101 = specific cable/connector config

Functional Features:

  • Dual UV/IR detection — requires BOTH signals to confirm flame (eliminates false alarms from welding arcs, sunlight, hot surfaces)
  • Air purge system — keeps lenses clean
  • Fail-safe relay — de-energizes on flame loss OR sensor failure
  • Adjustable sensitivity — independent UV and IR gain controls
  • LED indicators — Power, UV signal, IR signal, Flame, Fault

Performance Parameters:

Metric Value
Detection Range Up to 15m (large flame)
False Alarm Rejection >99.9% (dual-spectrum vs single UV)
Response Time 0.5–3 sec
Purge Air 5–15 SCFH clean dry air
Lens Life 12–18 months (with purge)

Applicable Industries: Oil & gas burners, refinery heaters, power plant boilers, waste incinerators, steel reheat furnaces, kilns, any environment with high false-alarm potential (welding, sunlight).

Installation Requirements:

  • Direct line-of-sight to flame — no obstructions
  • Sight tube slope: 1/4″ per foot downward
  • Purge air: clean, dry, oil-free, 5–15 SCFH
  • Wire relay per BMS logic (normally energized for flame-present)

Usage Notes:

  • Dual UV/IR = significantly better false-alarm rejection than single UV (25SU3-2100)
  • “1101” suffix = specific cable length — match to control panel wiring diagram
  • Both UV AND IR channels must see flame for output to energize — this is the safety feature
  • Do not aim at welding arcs or direct sunlight
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