The core sensing element of the detector is a silicon carbide (SiC) photodiode with a fixed spectral response range of 210–380 nm short-to-medium-wave ultraviolet light. It only captures the characteristic ultraviolet radiation released by hydroxyl radicals during flame combustion. The gas turbine casing, high-temperature pipelines and glowing metal components solely emit infrared and visible light, which fall outside the sensitive band of the sensor, eliminating false alarms caused by thermal background interference at the physical level.

Unlike conventional UV probes, SiC material features superior resistance to oil fumes and flue gas penetration. Oil mist and water vapor inside the unit will not significantly attenuate detection signals. The sensor linearly converts UV light intensity into a standard 4–20 mA DC current signal and transmits it to the combustion control system in real time. It can not only detect flame presence or absence to trigger flame-out protection interlocks, but also output continuous flame intensity readings for combustion condition optimization and abnormal combustion early warning. With a response time of less than 20 ms, it meets the requirements for rapid flame-out protection during gas turbine startup and shutdown cycles.

Housing Material: 1.4571 stainless steel, resistant to high-temperature oxidation, oil & gas corrosion and industrial dust erosion.Optical Window: Fused silica with high ultraviolet transmittance, high temperature resistance and anti-cracking property.Mounting Connection: 3/4-inch NPT internal thread, universal standard for gas turbine flame viewing ports.Spanner Size for Assembly & Disassembly: 44 mm (1.73 inches).Electrical Connector: MIL-DTL 38999 Series III model 27Y-15-05PN aerospace connector, supplied with a standard 5-meter cable.Overall Dimensions & Weight: Max outer diameter 64 mm (2.520 inches), total length 128 mm (5.039 inches), unit weight 1.6 kg (3.5 lbs).Packaging Specification: Sealed foam carton; outer box dimension 235×110×107 mm, packaging tare weight 0.1 kg.Ingress Protection Rating: IP68 fully sealed dustproof and waterproof, capable of long-term operation under 100% relative humidity high-moisture conditions.Process Pressure Resistance: Maximum process pressure 28 bar (400 psi), compatible with high-pressure combustion chamber operating conditions.

Power Supply: 12–35 VDC direct current with built-in reverse polarity protection; nominal operating voltage 24 VDC.Signal Output: 2-wire 4–20 mA DC current loop linearly proportional to flame ultraviolet intensity. Output approximates 4 mA under no-flame / flameout conditions; full-scale flame signal exceeds 4 mA under irradiation of 1×10¹⁰ photons/in²/sec at 308 nm. Standard flameout threshold setpoint for gas turbine systems is 5 mA, flame presence threshold 5.6 mA.Response Time: Less than 20 ms, enabling instantaneous trigger of unit fuel cut-off interlock upon flame loss.Spectral Sensitivity: Standard detection UV band 210–380 nm, zero response to visible light and infrared radiation.Wiring Configuration: Integrated cable with aerospace connector; 2-wire design simplifies on-site wiring, featuring excellent anti-electromagnetic interference performance for compatibility with power plant DCS and gas turbine control systems.

Ultra-low false alarm rate: Adopts pure ultraviolet SiC sensing technology that fully filters interference from infrared radiation of hot metal, workshop lighting and sunlight, with no need for light-shielding or filter accessories.Ultra-long service life: Silicon carbide detectors have over 20 years of verified application in the gas turbine industry, maintaining stable sensitivity without degradation under long-term UV irradiation. The stainless steel housing delivers outstanding vibration resistance and protection against oil & gas corrosion.Wide operating condition compatibility: Suitable for natural gas, diesel, heavy fuel oil and mixed fuels, and runs steadily in combustion chambers featuring high pressure, high humidity, high temperature and heavy dust loads.Safe, redundant and reliable performance: Dual explosion-proof certifications complying with ATEX and North American standards, IP68 full sealing, built-in reverse power connection protection, and millisecond-level flame loss response to guarantee explosion safety during gas turbine startup and shutdown.Full interchangeability: ITS 184X0254M029 matches the original RS-FS-9001 completely in mechanical structure, electrical specifications and programming parameters for direct drop-in replacement, cutting spare part procurement costs and reducing downtime during on-site replacement.Integrated standardized design: Equipped with standard NPT mounting threads and universal military-spec aerospace connectors, compatible with all heavy-duty industrial gas turbines under GE product lines to standardize installation, commissioning and maintenance procedures.