Honeywell LG1093AA24 (UV flame detector)
LG1093AA24 is a Honeywell LG1093 series industrial grade ultraviolet (UV) flame detector designed for monitoring open flames in high-risk industrial scenarios. It has extremely fast response, high temperature and pressure resistance, and is suitable for gas/oil burners and explosion-proof areas.

1、 Basic Information
Model: LG1093AA24
Brand: Honeywell
Type: Ultraviolet (UV) flame detector (detecting 185-260nm UV band)
Core application: Burner flame monitoring, explosion-proof area open flame alarm
Certification: SIL 2, Explosion proof certification (Class I Div 2/Zone 2)
2、 Core parameters
1) Detection performance
Principle: UV phototube, only responds to flame UV radiation, resistant to visible/infrared interference
Response time: milliseconds (<100ms), suitable for detonation/rapid flames
Detection distance: maximum distance of 15m under standard operating conditions (depending on flame size and environment)
Sensitivity: Adjustable, suitable for flames such as gas, fuel, coal powder, etc
2) Electrical and Interface
Power supply: 24VDC (18-30VDC)
Output: switch value/4-20mA, compatible with DCS/PLC/fire alarm host
Cable: PTFE shielded cable, standard length 4.9m (AA24), optional 12.8m/18.6m
Wiring: 3/4 «NPT internal thread, 1» external thread conduit interface
3) Environment and Machinery
Working temperature: -40 ℃~+177 ℃ (-40 ° F~+350 ° F)
Pressure resistance: 150PSI @ 400 ° F (2.76MPa @ 204 ℃)
Installation: 3/4 «NPT thread installation, fixed on the side wall of industrial furnace/burner
Material: Stainless steel shell, explosion-proof and dustproof, suitable for harsh working conditions
Weight: Approximately 3kg
3、 Key functions
Pure UV detection with low false alarms
Only responds to flame specific ultraviolet radiation, ignoring sunlight, light, and infrared heat sources
Built in dynamic threshold algorithm to distinguish between real flames and interference (welding, lightning)
High temperature and high pressure resistance, explosion-proof design
Wide temperature+pressure resistance, suitable for high temperature and high pressure equipment such as boilers, heating furnaces, reaction vessels, etc
Explosion proof grade: Class I Div 2 A/B/C/D T4; Zone 2 IIC T4
Real time self check+fault diagnosis
Continuously self check UV tubes, circuits, and wiring, and report faults in real-time
Automatic recognition of wire breakage/short circuit/power abnormality, dual output of alarm and fault
Adapt to multi fuel flames
Natural gas, liquefied gas, diesel, heavy oil, coal powder and other complete/incomplete combustion flames can be stably detected
4、 Typical applications
Petrochemical industry: flame monitoring for heating furnaces, cracking furnaces, torches, and reaction vessels
Electric energy: flameout protection for gas turbines, boilers, and coal powder burners
Industrial manufacturing: open flame alarm for metallurgical furnaces, heat treatment furnaces, and incinerators
Explosion proof areas: oil and gas platforms, storage tank areas, chemical workshop fire warning
5、 Model Analysis (LG1093AA24)
LG1093: Serial Number (Industrial UV Flame Detector)
AA: 24VDC power supply+standard sensitivity
24: Cable length 4.9m (16ft)
6、 Key selection points
Need for quick response and high temperature resistance: Choose LG1093AA24 (pure UV)
Smoke resistance+long-distance: choose infrared/red ultraviolet composite detector
Explosion proof+SIL 2: LG1093AA24 fully compatible