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Fireye 25SU3-2100
Fireye 25SU3-2100 - Image 2
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PIONEER MAGNETICS 24F33-0-4-R-S
PIONEER MAGNETICS 24F33-0-4-R-S
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Sew 31C075-503-4-00
Sew 31C075-503-4-00

Fireye 25SU3-2100

Product Name: Fireye 25SU3-2100 — UV Flame Detector (Flame Scanner)

Product Overview: Ultraviolet (UV) flame detection sensor manufactured by Fireye (a brand of Fortive / Gems Sensors). Used for flame supervision in industrial burners and boilers.

Category:
Description

Technical Specifications:

Parameter Value
Detection Type UV (Ultraviolet)
Wavelength 185–260 nm (UV-C band, solar-blind)
Response Time <4 seconds (typical)
Viewing Angle 3° (narrow field)
Sensor Type UV phototube (gas-filled)
Housing Material Stainless Steel 316L
Lens Material Sapphire (UV-transparent, high temp)
Operating Temp -40°C to +70°C ambient
Process Temp (lens) Up to 300°C (with air purge)
Electrical Output Relay contact (SPDT), 5A @ 250VAC
Power Supply 24VDC or 120/240VAC (model dependent)
Mounting 25SU = 2″ NPT thread mount with sight tube
Protection Rating IP66/IP67 (with purge)
Certifications FM, CSA, ATEX (Zone 1/2), IECEx

Functional Features:

  • Solar-blind UV detection — immune to sunlight and artificial UV interference
  • Air purge system — keeps lens clean in dirty combustion environments
  • Fail-safe relay — de-energizes on flame loss or sensor failure
  • Adjustable sensitivity — potentiometer on housing
  • LED status indicator — power, flame, fault

Performance Parameters:

Metric Value
Detection Range Up to 10m (depending on flame size)
False Alarm Rate <0.1% (with proper installation)
Response Time 0.5–4 sec (adjustable)
Purge Air Requirement 5–15 SCFH clean dry air
Lens Life 12–24 months (with purge)

Applicable Industries: Oil & gas burners, power plant boilers, waste incinerators, refinery heaters, kilns, furnaces.

Installation Requirements:

  • Mount with direct line-of-sight to flame (no obstructions)
  • Install sight tube with proper slope (1/4″ per foot downward to drain condensate)
  • Connect purge air supply (clean, dry, oil-free)
  • Wire relay contacts per burner management system (BMS) logic

Usage Notes:

  • “2100” suffix indicates specific cable length / connector configuration — verify per datasheet
  • Air purge is mandatory for reliable operation in dirty environments
  • Clean sapphire lens every 6 months if no purge is used
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