I. Product Description
Full Model: SC2L-95UVS2-1CEX
95UVS2: The second-generation ultraviolet (UV) integrated flame detector in the InSight series (with built-in amplifier, flame relay, no external amplifier required)
SC2L: Accompanied by SC2L explosion-proof installation sleeve / view window component (including blow-off air interface, furnace wall installation threads, high-temperature resistant isolation window)
1: Standard basic hardware version
CEX: Explosion-proof wiring compartment (Ex d explosion-proof type, built-in terminal block, 3/4″NPT cable threads, no quick aviation plug)
Brand: Fireye (American Feni, a brand for combustion safety monitoring head)
Product Positioning: Explosion-proof ultraviolet flame probe for hazardous conditions, suitable for natural gas, liquefied gas, gas boilers / incinerators, detecting the ultraviolet flickering characteristics of flames, equipped with microprocessor, electronic self-check, dual relay outputs, meeting SIL2 combustion safety interlock requirements
Model Segmentation Explanation Table
Segmented code Official definition
SC2L Complementary integrated explosion-proof installation kit, including purge air connector, high-temperature resistant quartz window, furnace installation flange
95UV UV ultraviolet spectrum sensor (295~320nm, only captures ultraviolet light from the flame, shields interference from sunlight / incandescent light)
S2 S2 second-generation automatic calibration model: One-click automatic learning of flame threshold, no need for manual adjustment of gain, flicker frequency
1 Standard hardware, 24VDC power supply, standard relay output
CEX Explosion-proof Ex d wiring housing: 3/4″NPT cable entry, internal screw terminal wiring, dedicated for explosion-proof areas (different from QD aviation plug model)
Core optical and detection performance
Spectral band: UV ultraviolet 295~320nm, only recognizes gas combustion flames, effectively avoids false alarms from workshop lights, sunlight
Flame recognition logic: Analyze flame flicker modulation frequency, distinguish target flame from background stray light; S2 model automatically learns flame characteristics, adapts to low nitrogen, weak flame conditions
Response speed: Flame loss cut-off response < 50ms, meets the safety specification for emergency fuel valve shutdown in boiler extinguishing
Electronic self-check: Full electronic circuit diagnosis, no mechanical shading shutter required; probe internal optical path, sensor, circuit faults automatically trigger fault relay alarm Fireye
Display operation: Front 8-bit digital LED screen + 4 keys, real-time display flame intensity, gain, fault code, supports password-locked parameter to prevent accidental modification
Electrical specifications
Power supply: 24VDC ±10%/-15%, total machine power consumption 8.5VA, working current 0.35A
Relay output (two independent dry contacts)
Flame relay: SPST normally open NO, closes when flame detected; contact capacity 2A@30VDC
Fault relay: SPST normally closed NC, opens when probe loses power / fails, used for system diagnosis and alarm
Wiring structure (CEX explosion-proof model)
Internal screw terminal block in the cavity, 3/4″NPT external thread for explosion-proof cable entry; non-CEX version is 12-pin quick aviation plug QD type
Analog output (optional): 0~5VDC flame intensity feedback, can be connected to PLC / recorder for real-time monitoring of combustion status
Explosion-proof, environmental and mechanical parameters
1. Explosion-proof certification (core advantage of CEX)
Explosion-proof grade: Class I Div 2 A/B/C/D; ATEX Ex d IIC T6 explosion-proof housing
Protection grade: NEMA4X / IP66, waterproof and dustproof, suitable for outdoor, humid boiler rooms, hazardous areas in petrochemical industries
2. Temperature tolerance
Environmental temperature: -40℃ ~ +65℃
Internal maximum temperature of the probe: -40℃ ~ +81℃
SC2L kit provides purge air, isolates furnace high-temperature radiation, protects probe optical window
3. SC2L kit assembly structure
Furnace connection thread: 1″NPT, compatible with boiler viewing hole
Purge air interface: 3/8″NPT, connects to dry compressed air, cools the window, blocks smoke, oil and dust from contaminating the lens
Built-in high-temperature resistant quartz glass window, blocks furnace high-temperature radiation, extends probe lifespan
4. Material size
Probe housing: Cast aluminum powder coating; SC2L kit carbon steel galvanization; total machine weight approximately 3.2kg
Core functional features
Integrated without external amplifier: Built-in signal processing, threshold comparison, flame relay, no need to pair with external flame amplifier, simplifies wiring Automatic Flame Learning (S2 Core): After ignition, it automatically collects the amplitude of the target flame and automatically sets the ON (ignited) / OFF (熄fire) thresholds, suitable for low-nitrogen lean combustion and low calorific value gas.
Full-loop Fault Diagnosis： Sensor failure， open circuit in wiring， abnormal power supply， and dirtiness of the optical path are all identified and fault alarms are triggered.
Safety Interlock Adaptation： The relay is directly connected in series with the safety circuit of the gas solenoid valve. The fuel is cut off immediately upon ignition to prevent explosion.
Parameter Storage： The calibrated thresholds are permanently saved upon power loss， eliminating the need for repeated calibration.
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