Schenck FSM 006A64

Technical Specifications

1. Detection spectrum: 180 nm ~ 260 nm UV-C band
2. Rated operating voltage: 24 V DC ±10%
3. Power consumption: Max 6 W
4. Flame response time: <200 ms
5. Relay output contact capacity: 5 A @ 250 V AC NO/NC dual contacts
6. Ambient operating temperature: -20°C ~ +70°C; up to +150°C with cooling air purge
7. Protection class: IP66
8. Cable interface: M20 waterproof threaded connector
9. Dimensions: 145 mm × 68 mm × 52 mm
10. Net weight: 0.42 kg

Function Features

• Anti-interference optical filter design, eliminates sunlight, incandescent lamp, electric arc false flame detection
• Built-in automatic self-test circuit, periodic self-check of UV sensor failure, circuit open/short circuit
• Adjustable flame sensitivity threshold via potentiometer on front panel, adaptable to natural gas, diesel, coal powder, hydrogen fuel
• Dual channel fault signal output: local LED indicator light + remote relay alarm contact
• Reverse power connection protection, overvoltage surge protection built-in circuit
• Long service life UV photoelectric tube, no frequent replacement
• Compliant with international combustion safety certification standards

Application Scenarios

Performance Parameters

• UV detection distance maximum: 12 m under clean combustion environment
• Flame loss interlock delay: adjustable 0.5 s ~ 10 s
• Vibration withstand: 5–200 Hz, 2 g continuous vibration without malfunction
• Service life of UV sensor tube: ≥50,000 working hours
• Cold storage temperature: -40°C ~ +75°C
• Insulation resistance between power terminals: ≥100 MΩ

Material Composition

1. Outer housing: Die-cast aluminum alloy with hard anodized anti-corrosion surface
2. Optical window: High-transmittance UV quartz glass, anti-scratch coating
3. Internal circuit board: FR4 anti-high temperature PCB, tin-plated copper traces
4. Sealing ring: EPDM ethylene propylene rubber waterproof gasket
5. Internal sensor core: Vacuum UV photoelectric tube with nickel alloy electrode

Structural Characteristics

Working Principle

Installation Requirements

1. Install at 15°–75° inclination angle aiming at stable flame core area, avoid direct alignment with furnace wall high-temperature reflection surface
2. Reserve compressed air purge pipeline interface to blow soot and dust on quartz window regularly
3. Wiring cable uses shielded wire, shield layer single-point grounding at control cabinet end
4. Mount cooling air pipe if installation surface temperature exceeds 70°C; cooling air pressure 0.2–0.4 MPa dry clean compressed air
5. Fix mounting flange with stainless steel bolts, add high-temperature resistant graphite gasket between flange and furnace wall
6. Keep minimum 200 mm distance from ignition transformer to avoid electromagnetic interference

Use & Maintenance Precautions

• Clean quartz optical window every 3 working days to remove soot accumulation which will reduce detection sensitivity
• Do not use corrosive solvent to wipe quartz glass; only soft microfiber cloth with anhydrous ethanol
• Avoid mechanical impact on front optical window, quartz glass crack will completely lose detection function
• Check air purge pipeline unobstructed daily; blocked air pipe leads to window fouling and false flame loss alarm
• Replace UV photoelectric tube every 50,000 working hours to guarantee detection accuracy
• Disconnect 24V DC power before disassembling module; do not touch internal circuit components with bare hands
• Regular test flame loss interlock function by cutting off fuel supply manually to verify alarm output validity