Fireye 85UVF1-1CEX

Series: 85UVF Series — UV Flame Monitoring

Product Overview:
The Fireye 85UVF1-1CEX is an explosion-proof ultraviolet (UV) flame scanner designed for hazardous area (Class I, Division 1/2) applications. It detects UV radiation from flames in boilers, furnaces, heaters, and incinerators and provides a relay output for flame-safe shutdown control. The “1CEX” suffix indicates Class I, Division 1/2, Group C/D, T4 temperature class.

Category:
Description

Technical Specifications:

Parameter Value
Model Number 85UVF1-1CEX
Detection Method Ultraviolet (UV) radiation, 185–260 nm bandpass
Response Time < 4 seconds (typical)
Viewing Angle 5° full angle (narrow field)
Detection Range Up to 15 meters (50 ft) depending on flame size
Output 1 SPDT relay (Form C), 5A @ 250V AC
Relay Contact Rating 5A resistive, 2A inductive at 250V AC
Supply Voltage 24V DC or 120V AC / 240V AC
Power Consumption 5W (24V DC) / 8VA (120V AC)
Housing Material 316 Stainless Steel
Window Material Sapphire (UV-transparent)
Explosion Rating Class I, Div 1 & 2, Groups C & D, T4
IP Rating IP66 (weatherproof)
Operating Temperature -40°C to +70°C (-40°F to +158°F)
Mounting 1″ NPT thread or flange mount
Weight 2.3 kg (5.1 lb)
Certifications UL, CSA, ATEX (II 2G Ex db IIC T4 Gb)

Function Features:

  • UV-specific detection — immune to visible light interference (sunlight, welding arcs)
  • Explosion-proof housing — safe for Zone 1 / Zone 2 hazardous areas
  • Sapphire window — scratch-resistant, UV-transparent, long service life
  • Relay output — direct integration with burner management system (BMS)
  • Self-diagnostic LED — power, flame, fault indicators
  • Fail-safe design — loss of signal triggers safe shutdown

Applicable Industries:
Oil & gas, petrochemical, power generation, refineries, chemical plants, waste incineration.

Installation Requirements:

  • Mount with clear line-of-sight to flame
  • Maximum viewing distance: 15m (50 ft)
  • Use 1″ NPT conduit for cable entry (explosion-proof fitting required)
  • Align scanner within ±2° of flame centerline
  • Ground housing to plant earth

Usage Notes:

  • Clean sapphire window every 3 months in dirty environments
  • Do not look directly into flame with bare eyes — UV is invisible but damaging
  • Relay must be wired to burner shutdown solenoid in safety circuit
  • Recalibrate annually per NFPA 85 / NFPA 86
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