HONEYWELL LG1093AA26 (Part No. 261A1812P013) is a dedicated ultraviolet flame sensor probe belonging to the LG1093 series Geiger-Müller phototube flame monitoring assembly. It is custom-engineered for GE gas turbine units.

The sensor detects flame radiation within the 180–260 nm ultraviolet spectrum to output flame presence/absence signals. It can be paired with remote matched amplifier modules for linkage, enabling continuous flame condition monitoring for onshore power generation, offshore platforms and marine power units.

It features explosion-proof construction, wide operating temperature range and compatibility with long-distance cables. Certified to explosion protection and EMC compliance standards for multiple regions worldwide, this probe is widely deployed in flame failure safety interlock systems for high-power combustion equipment. It delivers outstanding field performance including ultra-low false alarm rates, ultra-fast response speed and long-term stable operation.

Model Code Breakdown

LG1093AA26 Code Segment Definition

1. LG1093: Main product series code, representing the general category of Geiger-Müller tube ultraviolet flame sensors
2. AA: Probe body structure code, base model with stainless steel explosion-proof housing
3. 26: Built-in cable length code, corresponding to 61 feet (18.6 meters) integrated shielded armored cable

261A1812P013 Code Definition

1. 261A1812: Sub-spare part code for complete gas turbine units, matching the standard flame probe LG1093AA26
2. P013: Sub-item identifier to differentiate spare part variants of the same series with different cable lengths and explosion-proof specifications

Product Features

1. Sensing Element: Geiger-Müller phototube, detecting ultraviolet spectrum ranging from 1800–2600 angstroms (180–260 nm)
2. Signal Response: Flame detection ≤ 0.1 s, flame loss detection ≤ 0.2 s, zero signal delay or lag
3. Operating Temperature Range: Ambient temperature from -40 °F to 350 °F (-40 °C ~ 176 °C)
4. Pressure Resistance Specification: Sight window withstands 150 psig at 204 °C
5. Mounting Structure: Flange mounting with 1.73-inch outer diameter, compatible with standard 1-inch sight piping
6. Electrical Configuration: Two-core Teflon shielded armored cable with integrated outlet, non-cuttable and non-replaceable
7. Explosion-Proof Rating: Class I Div 1/2, Gas Groups B/C/D; ATEX II 2G Ex db IIC T3
8. Certifications: FM explosion-proof certification, CE EMC compliance, IECEx international explosion-proof certification, UL safety certification
9. Vibration Resistance: Maximum continuous vibration of 0.5 G, suitable for turbine compartments with high-frequency vibration
10. Shelf & Service Life: 2-year warranty for unused stock; Mean Time Between Failures (MTBF) of 10,000 operating hours after installation
11. Transmission Distance: Maximum wiring length of 305 meters between sensor and amplifier unit with no signal attenuation or distortion
12. Compatible Power Supplies: Rear amplifier unit supports three power supply types: 28 VDC, 20–35 VDC and 115 VAC

Product Advantages

1. The ultraviolet spectrum naturally filters interference from sunlight and high-temperature blackbody radiation, drastically cutting the frequency of false field alarms.
2. Ultra-fast signal response: typical flame detection within 0.1 seconds and flame loss identification within 0.2 seconds, enabling rapid and safe unit shutdown.
3. Supports maximum wiring length of 305 meters between the sensor and amplifier module, fitting long-distance unit layouts in large industrial plants.
4. The complete unit withstands extreme operating temperatures from -40℃ to 176℃, delivering stable performance under alternating hot/cold conditions and high-temperature compartment environments.
5. Comprehensive explosion-proof certifications cover Class I Division 1/2 Gas Groups B/C/D, with universal compliance across ATEX, FM, CE and IECEx standards.
6. Boasts an MTBF (Mean Time Between Failures) of up to 10,000 operating hours. The matched armored shielded cable provides strong resistance to vibration and electromagnetic interference.
7. Standardized flange mounting interface directly fits standard unit sight piping, simplifying on-site installation, disassembly and commissioning procedures.
8. Wide power supply compatibility with amplifier modules supporting 28 VDC, 20–35 VDC and 115 VAC, offering high compatibility for system retrofits and replacements.

Application Industries

1. Thermal power gas turbine power stations, continuous flame monitoring for land-based high-power gas units
2. Power generation units on offshore oil & gas production platforms, flame failure protection for high-risk explosion-prone environments
3. Combustion safety monitoring for marine auxiliary propulsion engines and marine generator diesel engines
4. Gas combustion equipment at compressor stations for long-distance oil & gas transmission pipelines
5. Large industrial heat treatment furnaces and high-temperature metallurgical combustion kilns
6. Self-owned power combustion systems and heating furnaces at hydrogenation units in chemical industrial parks
7. Aero-engine test benches and gas turbine testing & inspection equipment
8. Distributed energy CCHP (Combined Cooling, Heating and Power) trigeneration units

Frequently Asked Questions

Q1 Are LG1093AA26 and 261A1812P013 an inseparable set of spare parts?

A1 The two items are supplied as a matching one-to-one assembly. 261A1812P013 is the full turbine unit spare part number, while LG1093AA26 refers to the standalone sensor probe model. The probe can be purchased separately to fit the original equipment tag number.

Q2 Can this probe replace LG1093AA24 and LG1093AA36?

A2 They share fully interchangeable mounting flanges and electrical interfaces; the only difference lies in cable length. The AA24 version has a 4.9 m cable and the AA36 version features a 12.8 m cable. Cross-replacement is allowed as long as the on-site wiring length is verified.

Q3 Are additional explosion-proof accessories required for offshore platform deployment?

A3 The unit comes complete with full ATEX and FM explosion-proof certifications, and its housing rating meets Class I Div 1 & 2 standards for offshore environments. Only standard wiring with an explosion-proof junction box is necessary.

Q4 Can the cable be replaced separately if it is damaged?

A4 The cable and probe are hermetically integrated as a single molded assembly. Cable damage requires full replacement of the entire probe unit; cable replacement alone is not feasible.

Q5 How to troubleshoot frequent flame loss alarms during operation?

A5 Inspect the following items in sequence: carbon buildup blocking the lens, kinked or broken cables, faulty shield grounding, unstable power supply to the amplifier module, and high-temperature aging of the probe. Retest signal strength after cleaning the lens.

Q6 What are the storage requirements, and how long can the unit be stored before expiring?

A Store indoors under ambient temperature, dry and light-shielded conditions with a maximum shelf life of 2 years. Units exceeding this storage period must pass signal performance testing before installation.

Q7 What power rating of gas turbine units is this probe compatible with?

A There is no upper power limit. It is compatible with all GE gas turbine models for onshore and offshore applications. Select the variant with the matching cable length based on wiring distances inside the turbine compartment.

Q8 Will detection failure occur during startup in subzero temperatures?

A The rated minimum operating temperature is -40°C. No preheating is needed for cold startups; the unit instantly detects UV flame signals upon power-up with no cold-start delay malfunctions.

Recommended Models of the Same Brand

1. LG1093AA24 Ultraviolet Flame Sensor
2. LG1093AA36 Ultraviolet Flame Sensor
3. LG1093AA44 Ultraviolet Flame Sensor
4. LG1093AA45 Ultraviolet Flame Sensor
5. LG1093AA46 Ultraviolet Flame Sensor
6. LG1093AC01 Ultraviolet Flame Sensor
7. LG1093AC02 Ultraviolet Flame Sensor
8. LG1093AC05 Ultraviolet Flame Sensor