Description
Product Introduction
Honeywell 261A1812P012 is a UV flame scanner designed for GE gas turbine combustion monitoring systems. It detects ultraviolet radiation from hydrocarbon flames via a Geiger-Mueller phototube and converts intensity into pulse signals for flame-on/flame-out logic.
The unit matches the Honeywell LG1093AA24 form-fit-function equivalent and works with EG1033-series amplifiers. Stainless construction, fused-silica window, and 300 psi pressure rating support continuous service in high-vibration, high-temperature turbine environments. Direct replacement of the original GE part avoids control-system redesign when stock is still available as new surplus.
Frequently Asked Questions
Q: Does this sensor support hot-swapping?
A: No. Power down the associated EG1033 amplifier and isolate the fuel train before removal. The high-voltage bias and phototube characteristics make live swap unsafe and can damage the tube.
Q: Is the part obsolete? Are there direct replacements?
A: Manufacturer listings mark the original GE number as discontinued. The current functional equivalent is Honeywell LG1093AA24 with identical 16 ft cable length. Confirm amplifier firmware and threshold settings match before swap; older EG1033 revisions may need recalibration.
Q: Will I lose configuration or trip history during replacement?
A: The scanner itself holds no program. Flame thresholds and trip logic live in the amplifier and turbine control system (Mark V/VI/VIe). Record current pulse counts and setpoints before change-out, then verify flame-on response after power-up.
Q: Are these factory-new or refurbished?
A: Units offered as new original (new surplus) undergo inbound serial-number and origin checks, visual inspection for corrosion or window damage, functional UV response testing on a calibrated source, insulation resistance check, and final anti-static packaging. They are tested to ensure proper functionality; no claim of zero future failure is made.
