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Flame sensor D-LE 103

D-LE 103
Optical flame sensor

UV, VIS or IR flame sensor for combination with a control unit or burner control. For monitoring gas, oil and coal flames, particularly at single burner plants.  


Functionality: Optical flame monitoring

  • Flame sensor for every spectral flame monitoring range from UV to IR
  • Self-monitoring and fail-safe in conjunction with a control unit / burner control
  • Connection to the D-UG 120, D-UG 660 control units and D-GF 150(-MB) burner control
  • Uniform electrical connection and connection to the combustion chamber, making all flame sensors interchangeable
  • Compact design also allows use in confined spaces
  • Selection of the available detectors allows the monitoring of flames of all fuels within the same device family
  • Device technology proven thousands of times over
  • Simple combustion plants with single burners or optically separated burners
  • Combustion processes in continuous operation
  • Applications with confined space at the burner plate
  • Technical data
Spectral sensitivityUV, VIS, IR
Operating modeIntermittent operation and continuous operation
Functional SafetySelf-monitoring and fail-safe in conjunction with a control unit or burner control, supports safety chains up to SIL 3
Opening angle
Ambient conditions-20 … +60 °C
Degree of protectionWith cable gland (D-LE 103…-CG): IP65With axial plug-in connector (D-LE 103…-P): IP67
ConnectionsSight tube G 1¼″ or NPT 1¼″, FPurge air G ½″ or NPT ½″, F
DimensionsØ 80 mm, length approx. 350 mm
WeightHousing (without cable) approx. 1 kg
  • Recommended
  • Optional
D-ZS 033-I - Swivel Mount for alignment of flame sensor to the flame to be monitored
D-ZS 117-I - Thermal isolator with electrical insulation
D-ZS 133-I - Ball valve for closing sighting tube
D-ZS 113 set - Set of apertures for insertion in purge air flange
D-ZS 118 - Optical adjustment aid for alignment of the swivel mount on the sighting tube
D-ZS 077-10 - UV-C test light source 230 V / 50 Hz
D-ZS 093 - UV-A, UV-B und IR test light source 230 V/50 Hz
D-ZS 140 - Terminal box for connecting flame sensor