Description
Honeywell LG1093AC01 | UV Flame Detector
Product Introduction
A flame detector replacement is not a simple sensor swap when it is part of a gas-turbine protection system. The Honeywell LG1093AC01 is a UV flame-sensing head used in Honeywell LG/EG flame-monitoring arrangements. It detects ultraviolet radiation associated with hydrocarbon combustion and sends its signal to compatible amplifier electronics, which determine the flame-present or flame-loss state.
The LG1093AC01 is listed as a flange-mounted version with a 9 ft (2.7 m) armored cable. Published product information identifies a Geiger-Mueller-type phototube and an operating temperature range of −40°C to +176°C. The sensor is designed for use with Honeywell EG1033 amplifier modules; the correct amplifier, wiring, and turbine-specific configuration must be confirmed before installation.
For maintenance and procurement teams, the key issue is application compatibility. A detector that physically fits the mounting point is not automatically a valid replacement for a specific turbine combustor or low-NOx configuration.
LG1093AC01
Key Technical Specifications
- Model: LG1093AC01
- Manufacturer: Honeywell
- Sensor Type: Geiger-Mueller-type UV phototube
- Detection Principle: Ultraviolet radiation sensing
- Reported Spectral Range: 180–260 nm
- Flame Present Response: Approximately 0.1 second, typical
- Flame Loss Response: 0.2 second maximum, as reported in product literature
- Sensor Supply: No separate sensor supply voltage is listed; the detector operates as part of the compatible amplifier system
- Amplifier Family: Honeywell EG1033
- Cable Length: 9 ft (2.7 m)
- Cable Construction: Two-conductor armored cable
- Mounting Flange: 1.73-inch outside diameter × 0.14-inch width
- Viewing Window Pressure Rating: Reported as 428 mbar (6.3 psi)
- Operating Temperature: −40°C to +176°C
- Reported Sensor MTBF: 10,000 hours; confirm the applicable specification revision
- Reported Operating History: More than one billion operating hours across the product family; not a guaranteed service life for an individual unit
- Amplifier Output Options: EG1033AA transistor open collector; EG1033AB/AC relay outputs, depending on amplifier variant
- Amplifier Supply Options: Vary by EG1033 model; do not apply these ratings directly to the sensor head
- Approvals: CE/ATEX listed for the AC01 configuration in published product documentation; verify markings and certificate applicability for the exact unit
Published LG1093 family data and reseller specifications provide the above performance details. Confirm the applicable OEM documentation and nameplate before using them as acceptance criteria for a safety-related installation.
Global Sourcing & Live-Test SOP
The LG1093AC01 is a combustion-monitoring component. Procurement acceptance should include configuration checks and documented testing—not just a visual inspection or a continuity check.
5.1 Inbound Verification
- Photograph the complete nameplate, model code, and certification markings.
- Confirm the part is LG1093AC01, not another LG1093 mounting or cable variant.
- Verify the flange dimensions and cable length against the removed detector.
- Inspect the armored cable for crushed sections, kinks, abrasion, or unauthorized splices.
- Check the connector and cable termination for corrosion, contamination, or mechanical damage.
- Inspect the viewing window for cracks, deposits, or signs of impact.
- Record serial number, supplier, condition, and any available traceability documents.
- Confirm whether the shipment contains the detector only or includes any separately specified accessories.
5.2 Bench Inspection and Functional Checks
- Use the approved Honeywell EG1033 amplifier configuration for the detector.
- Verify the detector-to-amplifier wiring against the applicable OEM diagram.
- Inspect cable insulation and termination condition before energizing the test arrangement.
- Check amplifier power and output behavior using the approved test procedure.
- Use a manufacturer-approved UV test method or suitable test fixture to confirm sensor response.
- Verify flame-present and flame-loss indication through the complete detector/amplifier chain.
- Record the amplifier model, test setup, and observed response.
Do not improvise a live-flame or high-energy UV test. Bench testing must follow the applicable Honeywell procedure and the site’s combustion-safety requirements.
5.3 System Compatibility and Diagnostics
- Confirm the installed amplifier is compatible with the .
- Verify the turbine OEM’s detector part number and any application-specific selection requirements.
- Confirm the cable routing, termination, and installed viewing geometry.
- Check the flame-monitoring channel’s alarm and trip logic using the approved commissioning procedure.
- Verify that flame-present and flame-loss states are correctly interpreted by the control system.
- Document all deviations from the original installed configuration.
5.4 Extended Run and Final Preparation
Where an approved test setup is available, perform an extended functional run appropriate to the maintenance procedure.
Monitor:
- Flame-present and flame-loss signal stability
- Intermittent output or signal dropout
- Cable and connector condition
- Amplifier diagnostics
- Unexpected channel transitions
Record the test date, detector model, serial number, amplifier model, test method, and result. Protect the viewing window and cable during shipment, and use suitable ESD-safe and impact-resistant packaging.
Field Engineer’s Pitfall Guide
❗ Do not assume every LG1093 detector is interchangeable
The LG1093 family includes different mounting interfaces, cable arrangements, and certification configurations. Match the complete part number and installed geometry before accepting a substitute.
❗ EG1033 amplifier ratings are not sensor supply ratings
Published voltage and output specifications refer to compatible amplifier variants. Do not apply amplifier supply voltage directly to the sensor head. Verify the actual wiring and amplifier model using the applicable Honeywell documentation.
❗ Low-NOx turbine applications require special attention
Published LG1093 product information warns that standard LG1093 units may not perform as expected on certain GE/NP DLE low-NOx gas turbines. Those applications may require specifically preselected detectors. Confirm the turbine model and OEM-approved detector selection before purchasing or installing a replacement.
Intent-Driven FAQ
What is the Honeywell ?
It is a UV flame detector used in gas-turbine flame-monitoring systems. The detector senses UV radiation from combustion and works with compatible amplifier electronics.
Does the require a separate power supply?
The sensor head itself is not listed with a separate supply voltage. It operates as part of a compatible flame-monitoring system. Confirm the amplifier model and wiring requirements before installation.
Which amplifier is compatible with the ?
Published product information identifies the Honeywell EG1033 amplifier family. The specific amplifier variant determines the output type and supply requirements, so verify compatibility with the installed system.
What is the cable length?
The is listed with a 9 ft (2.7 m), two-conductor armored cable. Confirm the actual cable length and condition on the supplied unit.
Is the suitable for every GE gas turbine?
No universal compatibility should be assumed. Some GE/NP DLE low-NOx applications may require specifically selected detectors. Verify the turbine model and approved part number with the OEM documentation.
Is the obsolete?
Availability can vary by region and supplier. Surplus listings exist, but listing availability does not establish current OEM production status. Confirm lifecycle status and sourcing options with Honeywell or an authorized channel.
What should I verify before buying a replacement?
Confirm the complete model number, cable length, flange configuration, viewing-window condition, certification markings, amplifier compatibility, and turbine application. Request clear nameplate and cable photos, along with a documented test result when the unit is sold as tested.
Bottom Line for Buyers
The is a flange-mounted UV flame detector intended for compatible -based flame-monitoring systems. Its 9 ft armored cable and published CE/ATEX configuration make exact-variant verification important during replacement procurement.
Before ordering, match the complete model number and turbine application, confirm amplifier compatibility, and request evidence of condition and functional testing. For low-NOx turbine installations, obtain explicit confirmation that the detector selection is appropriate for the specific combustion system.
