Honeywell LG1093AA03 UV Flame Detector Sensor

Product Overview

The LG1093AA03 from Honeywell is an industrial-grade ultraviolet flame detector engineered for dependable flame supervision in high-risk combustion environments. It is designed to sense the ultraviolet emissions characteristic of hydrocarbon flames and operates as a sensor head within a complete flame safeguard system when paired with a compatible amplifier.

This detector is widely deployed in gas turbine packages, industrial burners, and enclosed combustion chambers where rapid flame verification and loss detection are critical to protective shutdown logic.

Detection Principle and Performance

The LG1093AA03 uses a UV-sensitive tube optimized for the solar-blind ultraviolet band produced by hydrocarbon combustion. By focusing on this narrow spectrum, the detector minimizes false responses from hot surfaces, ambient lighting, or electrical interference.

The sensor is powered directly by its associated amplifier, which supplies the required high-voltage excitation and processes the flame signal for control system interlocking.

Key Technical Specifications

General Characteristics

• Device Type: UV Flame Detector Sensor

• Model: LG1093AA03

• Manufacturer: Honeywell

• Origin: United States

Optical and Electrical Characteristics

• Sensing Method: Ultraviolet radiation detection

• Spectral Sensitivity: Approximately 185–265 nm

• Flame Response Time: Typically under 3 seconds; sub-second response achievable depending on amplifier and system configuration

• Supply Voltage: High-voltage DC provided by external amplifier (nominal ~350 VDC)

Mechanical Construction

• Burner Mounting Interface: 3/4 in. NPT internal thread

• Conduit Connection: 1 in. external thread

• Standard Cable Length: 1.5 m (assembly-dependent)

• Weight: 0.5 kg

Environmental Ratings

• Operating Temperature Range: –40 °C to +85 °C

• Suitable for continuous operation in turbine enclosures and industrial burner housings

Functional Advantages

• High UV Sensitivity enables reliable detection of low-intensity flames during ignition and steady-state operation

• Fast flame confirmation supports safety-critical shutdown sequences

• Rugged industrial design ensures long service life in vibration- and heat-intensive installations

• Compatible with single- or dual-sensor architectures, including UV or combined UV/IR flame monitoring systems

Typical Applications

The LG1093AA03 is commonly used in gas turbines, refinery and petrochemical burners, industrial furnaces, boilers, and other combustion systems requiring certified flame supervision.

FAQ

Does the LG1093AA03 operate as a standalone device?
No. The LG1093AA03 functions as a sensing element and must be connected to a compatible Honeywell flame amplifier to provide power, signal processing, and safety outputs.

Is this detector suitable for continuous-duty turbine operation?
Yes. Its temperature rating, vibration tolerance, and UV-based detection principle make it well suited for continuous monitoring in turbine and burner applications.

Can this model be used in redundant flame detection systems?
Yes. Many installations use dual LG1093AA03 sensors connected to a single amplifier to improve system availability and diagnostic coverage.