85UVF1A-1QD Fireye UV Flame Scanner Burner Safety Relay Module

85UVF1A-1QD | Intelligent UV Flame Supervision System

Fireye 85UVF1A-1QD delivers precise ultraviolet flame detection for industrial combustion systems.

The scanner combines flame sensing, relay logic, analog output, and diagnostics within one industrial enclosure.

It supports continuous flame supervision in demanding burner management applications.

The integrated flame relay design reduces external control complexity.

The scanner reacts rapidly to flame loss conditions and improves combustion safety performance.

Recommended for engineers seeking stable flame discrimination under difficult furnace conditions.

Why Engineers Choose 85UVF1A-1QD

• Integrated UV flame scanner with internal relay logic
• Reliable ultraviolet flame sensing technology
• Fast flame response improves burner shutdown protection
• 4-20mA flame strength output included
• Multi-LED operating diagnostics
• Industrial cast aluminum construction
• Suitable for high-temperature combustion environments
• Supports direct burner mounting applications
• Fiber optic assemblies available for restricted sighting conditions

Technical Profile

• Manufacturer: Fireye
• Model: 85UVF1A-1QD
• Product Type: Integrated flame scanner with internal flame relay
• Detection Technology: Ultraviolet flame sensing
• Power Input: 24 Vdc nominal
• Supply Current: 200 mA
• Relay Outputs: Flame relay SPST (N.O.), Fault relay SPST (N.C.)
• Analog Signal: Isolated 4-20mA flame strength output
• Maximum Analog Load: 750 Ohms
• Electrical Connector: 8-pin quick disconnect
• Contact Capacity: 2A @ 30Vdc / 2A @ 230Vac resistive
• Housing Material: Cast aluminum with polyester coating
• Scanner Weight: 5.90 lbs (2.69 kg)
• Viewing Method: Direct flame sighting
• Operating Temperature: -40°C to +65°C ambient
• Internal Scanner Temperature: Up to +82°C
• Humidity Range: 0% to 95% non-condensing
• Pollution Degree: 2
• Overvoltage Category: III
• Protection Environment: Industrial combustion systems
• Response Characteristic: Rapid flame presence recognition
• Signal Stability: High UV sensitivity with isolated output design

Functional Architecture

• UV Detection Core
  • Detects ultraviolet radiation emitted by combustion flame
  • Improves discrimination against background furnace glow
• Relay Safety Layer
  • Internal flame relay simplifies burner interlock design
  • Fault relay supports fault annunciation systems
• Diagnostic Interface
  • Multiple LEDs display flame signal condition
  • Supports fault code visualization
  • Keypad enables operational mode selection
• Analog Monitoring
  • Continuous 4-20mA flame intensity transmission
  • Supports combustion trend monitoring

Cooling & Purge Air Requirements

• Use clean, dry, cool purge air only
• Standard airflow requirement: 4 SCFM
• Dust-heavy fuel systems may require 15 SCFM
• Purge pressure must overcome furnace pressure conditions
• Proper airflow extends optical component life

Global PLC Spare HUB's Insight

85UVF1A-1QD performs effectively in combustion systems requiring stable flame discrimination under fluctuating furnace conditions.

The integrated relay structure reduces cabinet wiring complexity.

The analog flame signal improves combustion trend analysis and predictive diagnostics.

Its UV sensing method minimizes false flame detection from refractory radiation.

This scanner fits combustion safety architectures requiring rapid flame failure response.

Recommended Equipment & Applications

• Industrial gas burners
• Oil-fired combustion systems
• Boiler management systems
• Thermal oxidizers
• Petrochemical furnaces
• Power plant combustion systems
• Steam generation equipment
• Industrial kilns and ovens
• Multi-burner flame safeguard systems

Diagnostic & Monitoring Capabilities

• Real-time flame signal monitoring
• Weak flame identification
• Flame instability detection
• Burner startup verification
• False flame prevention support
• Combustion quality trending
• Fault relay alarm integration
• Background radiation discrimination

ATEX & Industrial Protection Information

• CEX versions available with ATEX certification
• Ex II 2 G/D rated housing option available
• Suitable for hazardous industrial environments

Cable Specification

• Fireye cable reference: P/N 59-546
• 8-conductor shielded cable structure
• #18 AWG conductors
• PLTC-ER rated cable design
• PVC cable jacket construction
• Temperature range: -40°C to +105°C
• Foil wrap and braided shield improve interference resistance

Shipping & Logistics

• Worldwide delivery available
• Express shipment via FedEx, UPS, and DHL
• Fast dispatch within 24-48 hours
• Protective industrial export packaging included

Warranty Support

• 12-month warranty coverage
• Technical support available during warranty period
• Inspection and verification completed before shipment

Professional FAQ

• Why does UV detection perform better in bright furnace conditions?

  UV sensing ignores most visible refractory glow and improves flame discrimination accuracy.

• What causes unstable flame signal readings?

  Improper sighting angles, dirty scanner windows, or insufficient purge airflow commonly cause instability.

• How should engineers select scanner mounting positions?

  Choose a direct flame sight path while avoiding refractory reflection and adjacent burner interference.

• When should fiber optic assemblies be considered?

  Use fiber optic assemblies when burner access space is restricted or temperatures exceed scanner limits.

• What should users verify before selecting this scanner?

  Confirm burner fuel type, furnace pressure, viewing access, purge air availability, and control compatibility.

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