Overview

The Fireye 65UV5‑1004QD is an integrated ultraviolet‑tube‑based flame scanner belonging to Fireye Simplicity product familyFireye. It adopts an electromechanical self‑check shutter mechanism for automatic sensor health verification, eliminating the requirement for an external flame amplifier. This unit features QD quick‑disconnect electrical connector, fixed 4‑second flame failure response time (FFRT), and 4‑20 mA analog output proportional to flame intensity for remote flame‑strength trending.Powered by 24 VDC, it is purpose‑built for fossil‑fuel burners including natural gas, propane, kerosene and diesel. Equipped with internal flame relay and fault relay, it directly interfaces with BMS burner‑management safety logic. Rated NEMA 4X / IP66 housing fits Class I Div 2 hazardous locations, widely applied on industrial boilers, process furnaces and thermal oxidizers. Fireye 65UV5‑1004QD serves as critical spare for combustion‑safety‑system maintenance and field‑unit replacement jobsFireye。

Core Features & Technical Highlights

• Full part number Fireye 65UV5‑1004QD, Simplicity UV self‑checking flame scanner, QD quick‑disconnect connector variant
• Sensing principle: UV tube sensor (190‑270 nm UV spectrum); built‑in mechanical shutter for automatic self‑diagnosis of sensor failure
• Fixed FFRT: 4‑second flame failure response time; contrast with 65UV5‑1004EQD which delivers 1‑second fast‑response FFRTFireye
• Power supply: 24 VDC, typical 100 mA consumption; internal SPDT flame relay, SPST fault relay; 4‑20 mA analog output for flame‑strength signal transmission
• Mechanical: cast‑aluminum powder‑coated housing, NEMA 4X / IP66 protection; mounting: 1‑inch NPT sight‑port thread, 3/4‑inch NPT purge‑air connection; QD quick‑disconnect connector for fast field‑replacement
• Hazardous‑area rating: Class I Div 2 Groups A/B/C/D, Ex II 3 G/D Ex nA IIC T4A; operating temperature‑40 °C ~ +65 °C, non‑condensing humidity 0‑95%Fireye
• Status indication: rear‑view LED indicator for flame‑present and fault alarm status; requires cooling‑purge air to protect optical lens from high‑temperature furnace radiation and soot contaminationManualsLib
• Compatibility note: Cannot substitute for 65UV5‑1004CEX explosion‑proof housing model; QD quick‑disconnect version cannot directly swap with cable‑integrated variants without wiring modification.

Typical Application Scenarios

Fireye 65UV5‑1004QD UV flame scanners are deployed in refineries, chemical‑plant furnaces, power‑plant auxiliary boilers, waste‑heat boilers and thermal‑oxidizer facilities within Class I Div 2 hazardous zones. It monitors single‑fuel UV‑emitting flames of natural gas, light‑oil and diesel burners, providing flame‑on/flame‑off judgement for burner‑safety interlock logicFireye.Common field‑degradation symptoms: lens soot contamination causing weak flame signal, shutter self‑check fault alarm, relay output abnormality, loss of 4‑20 mA analog trending signal. A defective scanner will disable flame‑loss protection, bringing risks of unburned‑fuel accumulation and potential furnace‑explosion hazards. Maintenance teams stock genuine 65UV5‑1004QD spare units to achieve fast swap‑out via quick‑disconnect interface and restore burner‑safety supervision without large‑scale cabinet re‑wiring.

Compatibility & Field Maintenance Guidance

When sourcing spare‑parts, strictly confirm complete identifier Fireye 65UV5‑1004QD. Distinguish it from 1‑second‑response 65UV5‑1004EQD and CEX explosion‑proof housing models; mismatched variants will change safety‑response timing or mechanical‑interface requirements.Installation and commissioning shall follow official Fireye CU‑104 service manual. After mounting and wiring, technicians verify purge‑air flow rate, check shutter self‑check action, confirm flame‑relay and fault‑relay logic, validate 4‑20 mA output signal, and perform flame‑loss proof‑test for safety‑loop acceptance. Preventive maintenance includes regular optical‑lens cleaning, quick‑disconnect‑connector inspection and purge‑air supply check during burner‑outage cyclesManualsLib.Only genuine Fireye 65UV5‑1004QD guarantees valid shutter self‑check function, stable UV‑sensor sensitivity and qualified hazardous‑area‑housing performance. Untested refurbished or counterfeit units carry severe risks: undetected sensor‑drift, self‑check failure, false‑flame indication or failure to trigger flame‑loss safety trips.

Summary

The Fireye 65UV5‑1004QD self‑checking UV flame scanner provides reliable fossil‑fuel flame supervision for Class I Div 2 hazardous‑area burner‑management‑systems. Quick‑disconnect QD connector simplifies on‑site replacement; fixed 4‑second FFRT defines the safety‑response timing of whole burner‑loop. Exact part‑number confirmation and post‑replacement safety‑proof‑test are essential for stable combustion‑safety‑protection performance.Tags: Fireye 65UV5‑1004QD, Simplicity UV flame scanner, self‑checking UV flame detector, QD quick‑disconnect flame sensor, burner management safety spare part