Honeywell LG1093AA44 LG1093 UV Flame Sensor

Description

Engineered for heavy-duty gas turbine combustion monitoring, the Honeywell LG1093AA44 is an industrial ultraviolet (UV) flame sensor optimized for power generation and compressor applications. Utilizing a specialized Geiger-Mueller type sensor phototube, this unit is designed to detect the UV radiation emitted by hydrocarbon flames while remaining completely solar-blind and highly tolerant to black-body radiation. Proven over decades of deployment on General Electric and GE-licensee gas turbines, this sensor interfaces seamlessly with EG1033 series amplifiers to provide critical flame status feedback to your turbine control system.

Features

• Highly Sensitive Phototube: Specifically tuned to target the 180 to 260 nm UV spectrum for reliable flame detection.
• Solar Blind Design: Prevents false positive readings from sunlight, infrared emissions, or surrounding high-temperature black-body radiation.
• Integrated Shielded Cable: Includes a 16-foot (4.9 m) Teflon-shielded cable with a 1-inch external conduit thread for structural protection in harsh environments.
• Pressure-Resistant Optics: Built-in optical viewing window rated for system pressures up to 10 bar (150 psi).
• Explosive Atmosphere Approvals: Certified for Zone 1 and Zone 2 environments (ATEX EEx d IIC T3) and Class I, Division 1 and 2 hazard areas.

Applications

• General Electric (GE) and GE-licensee industrial gas turbines.
• Turbine-driven compressor stations in gas pipeline transmission.
• Utility-scale power generation combustion monitoring systems.
• Hazardous-area industrial burners and combustion processes.

Technical Specifications

Empirical Engineering Insights

Alternative Models & Compatibility

The LG1093AA44 is designed exclusively to interface with Honeywell EG1033 amplifier modules. It is highly recommended to verify whether your specific turbine control application requires the transistor open-collector output of the EG1033AA or the SPDT relay contacts of the EG1033AB/AC units, as the sensor's baseline signal output is passive and requires active amplification to integrate with your PLCs or safety instrumented systems.

Application Pitfalls & Engineering Notes

CRITICAL APPLICATION EXCLUSION: The standard Honeywell LG1093 series, including this LG1093AA44 model, will not reliably operate on Dry Low NOx (DLE) gas turbines (such as GE/NP DLE configurations). DLE turbines require specialized, pre-selected sensors with alternative spectral thresholds. Attempting to use a standard LG1093 sensor in DLE environments will lead to frequent flame-out false alarms and operational instability.

Commissioning & Wiring Tips

When routing the integrated 16-foot Teflon-shielded cable, always run the conduit separate from high-voltage motor starters, ignition cables, or high-frequency variable speed drives (VSDs). Electromagnetic coupling on the sensor signal line can distort the high-impedance pulse signals generated by the Geiger-Mueller phototube, resulting in false flame-present signals during startup phases.

Installation Guidelines