The Honeywell LG1093AA26, also cataloged as the LG1093 flame sensor, operates as a dedicated optical detection device for flame presence monitoring within Honeywell combustion control panels.
Hardware Specifications
Parameter
Specification
Model
LG1093AA26
Brand
Honeywell
Origin
Not specified
Weight
4 kg
Dimensions
4.5 kg (noted as dimension, shipping weight 5.5 kg)
Operating Temp
-40 deg F to +350 deg F
Power Consumption
Not specified
Mounting Interface
3/4 inch internal NPT
Control Panel Connection
Teflon shielded cable with one inch external conduit thread
Window Pressure Rating
150 psig at 400 deg F
Cable Length Options
AAx4: 16 ft (4.9 m), AAx5: 42 ft (12.8 m), AAx6: 61 ft (18.6 m)
Product Type
Flame Sensor
4-20 mA HART Loop Protocol
Honeywell LG1093 flame sensors integrate into combustion management systems using standardized 4-20 mA loop signaling. The LG1093AA26 maintains stable loop continuity under elevated thermal conditions, with channel-to-channel isolation preventing interference when multiple sensors share a common panel interface.
Frequently Asked Questions
Q: Can the LG1093AA26 be replaced while the control panel is energized? A: Replacement is possible under hot-swap conditions, but the panel must be in a safe state and loop integrity maintained.
Q: What considerations apply to cable length selection? A: Cable length options (AAx4, AAx5, AAx6) must match installation distance to avoid excess loop resistance.
Q: Does the sensor require firmware updates? A: No. The sensor is hardware-only; compatibility depends on the receiving controller’s analog input scaling.
Field Installation Guidelines
Engage the 3/4 inch internal NPT threads fully to ensure mechanical stability and prevent leakage around the optical window.
Route the Teflon shielded cable through the one inch external conduit thread, grounding the shield at the control panel end only.
Avoid sharp bends in the cable near high-temperature zones to preserve insulation integrity.
Keep the optical window clear of soot or debris; periodic cleaning may be required.
Verify gap voltage and loop continuity during commissioning to ensure proper integration.
