Brand New Honeywell LG1093AA25 Gas Turbine Flame Detector

Product Overview

The Honeywell LG1093AA25 functions as a high-precision ultraviolet (UV) flame sensor specifically engineered for industrial burner management and gas turbine monitoring. It utilizes a specialized Geiger-Mueller phototube to detect the specific UV radiation emitted by hydrocarbon flames while remaining "solar-blind" to prevent false triggers from ambient light or hot refractory surfaces. We offer this unit as 100% Brand New original hardware, ensuring critical safety verification in high-pressure boilers, furnaces, and power-generation turbines.

Technical Specifications

Engineering Advantages

• Solar-Blind Spectral Precision: The LG1093AA25 responds only to ultraviolet radiation in the 1800–2600 Å range. This ensures the sensor ignores sunlight and the infrared glow from red-hot furnace walls, eliminating the most common causes of false flame-on signals in industrial combustion.

• Rapid Safety Response: With a response time under 200 milliseconds, the sensor provides near-instantaneous feedback to the Burner Management System (BMS). This speed allows for immediate fuel shut-off in the event of a flame failure, preventing dangerous gas accumulation and potential explosions.

• High-Pressure Capability: The sensor's viewing window withstands pressures up to 150 psig at elevated temperatures. This makes it ideal for direct mounting on pressurized combustion chambers in gas turbines and high-capacity industrial boilers.

• Rugged Stainless Steel Construction: Honeywell utilizes 1.4571 stainless steel for the sensor body, providing exceptional resistance to the corrosive gases and high-heat environments typical of chemical processing plants and refineries.

• Superior EMI Shielding: The integrated 42-foot Teflon cable features comprehensive EMI shielding. This protects the sensitive flame signal from the electrical noise generated by high-voltage igniters, motors, and nearby industrial power equipment.

Installation and Alignment

Mount the LG1093AA25 using the 3/4-inch NPT internal thread directly onto the sight pipe of the burner or turbine casing. The 90° wide-angle field of view offers flexibility in positioning, though you must align the sensor to capture the most intense part of the flame's UV cone (typically the first third of the flame). Ensure the sight pipe remains clear of obstructions. For extreme heat applications, we recommend utilizing a cooling air purge through the sight pipe to maintain the sensor temperature below the +121°C limit.

FAQs

• Does the LG1093AA25 detect hydrogen flames?

  Yes. Hydrogen flames emit radiation within the UV spectrum that the LG1093AA25’s 1800–2600 Å response range captures effectively, unlike some infrared sensors that struggle with hydrogen's low IR signature.

• What maintenance does the UV window require?

  The optical window must remain clean to ensure accurate detection. We recommend periodic inspection for soot or oil buildup. Utilizing a low-pressure air purge often extends the interval between manual cleanings.

• Can I replace the cable if it gets damaged?

  The LG1093AA25 comes with a pre-installed, factory-sealed 42-foot Teflon-shielded cable to maintain its environmental and explosion-proof integrity. If the cable is severely damaged, we recommend replacing the entire unit to ensure safety compliance.

• How do I verify the sensor's health?

  Modern Honeywell amplifiers monitor the pulsed output from the Geiger-Mueller tube. A lack of pulses during a known combustion state or a continuous signal without a flame (indicating a shorted tube) will trigger a system fault.