D-LX 100

Compact flame monitor

Self-monitoring and fail-safe compact flame monitor for the monitoring of gas, oil and coal flames with integrated UV, VIS or IR flame sensor, primarily in single burner view applications.


  • Suitable for continuous operation and 72-hour operation according to TRD 604
  • Compact design, flame sensor and control unit in one enclosure, takes up no space in control cabinet
  • LED display for settings and operational status
  • confirmed for operation up to SIL3


  • Power stations
  • Chemical industry
  • Refineries
  • Cement plants
  • Waste incinerators
  • Steam generators
  • Heating plants

Technical Data

Operational modeIntermittent operation, continuous operation,
72-hour operation without permanent supervision
SafetySelf-monitoring and fail-safe
Auxiliary supply24 VDC
Flame relay1x NO contact, 230 VAC, 2 A
Status relay1x NO contact, 230 VAC, 2 A
Flame Failure Detection Time (FFDT)1, 3, 5 s
Flame intensity0/4...20 mA
Spectral rangesUV, VIS, IR
Number of ranges1
Switching threshold0...9
Viewing angle
DisplayLED display
Perm. ambient temperature-20...+60°C
Sighting tube connectionG 1¼" or 1¼" NPT(F)
Purge air connectionG ½" or ½" NPT(F)
Protection classIP67
Dimensions90 x 92 mm, length approx. 350 mm
Weightapprox. 1.8 kg
Ex protection
D-LX 100 ../94ExII 2G Ex de IIC T5/T6
D-LX 100 ../95ExClass l, Div. 1, Group B, C & D
D-LX 100 ../96ExClass l, Div. 2, Group A, B, C & D
D-LX 100 ../97ExII 3G Ex nAnC IIC T6
Sighting tube connectionG 1“ (/94Ex, /95Ex)
G 1¼" (/96Ex, /97Ex)
Protection classIP65
DimensionsØ130 mm, length 313 mm
Weightapprox. 4.3 kg


  • Digital display for optimal adjustment of the flame sensors by measuring the pulse rate and its extreme values (D-ZS 087-20)
  • Set of orifice plates for insertion in purge air flange (D-ZS 113 Set)
  • Optical adjustment aid for the alignment of the Swivel mount on the sighting tube (D-ZS 118)
  • UV-C test light source 230 V / 50 Hz (D-ZS 077-10)
  • UV-A, UV-B and IR test light source 230 V/50 Hz (D-ZS 093)
  • Swivel mount for alignment of flame monitor to the flame to be monitored (D-ZS 033-I)
  • Thermal isolator with electrical insulation (D-ZS 117-I)
  • Ball valve for closing sighting tube (D-ZS 133-I)
  • Terminal box for connecting the flame monitor (D-ZS 140 / 141)
  • Wide range power supply unit for supply of several D‑LX 100 (D-NG 24/25a)

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