D-LX 200

Compact flame monitor

Self-monitoring and fail-safe compact flame monitor for the monitoring of gas, oil and coal flames with integrated UV or IR flame sensor.

Please note that this product was discontinued on December 31st, 2019. Further details are given in the discontinuation letter (English, German). 

Versions with CSA approval can still be purchased.

A modernised successor product is available.


  • Wide sensitivity range
  • For ambient temperatures from -40°C up to +85°C
  • Dual channel design throughout
  • Measurement of flame flicker frequency
  • Selective to individual burners and fuels
  • Optionally with complete SIL3 certification
  • Available with cable gland, cable plug (version /MP3) or as version for hazardous areas


Technical Data

Operational modeIntermittent operation and continuous operation, 72-hour operation without permanent supervision
SafetySelf-monitoring and fail-safe
Auxiliary supply24 VDC
Flame relay1x NO contact, 24 VDC, 0.5 A
Status relay1x NO contact, 24 VDC, 0.5 A
Flame Failure Detection Time (FFDT)1, 2, 3, 5 s
Analogue output0/4...20 mA
Spectral rangesUV, IR
Threshold switchesFlame intensity and flicker frequency
Viewing angle
CommunicationLED, Modbus RTU, IrDA
Ambient temperature range-40...+85°C
Sighting tube connectionG 1¼" or 1¼" NPT(F)
Purge air connectionG ½" or ½" NPT(F)
Protection classIP66/68
IP65 for version /MP3
Dimensions85 x 85 mm, length approx. 250 mm
Weightapprox. 1.25 kg
Ex protection
D-LX 200 ../85ExCl. I, Div. 1, Gr. A, B, C, D T6/T5
Cl. II, Div. 1, Gr. E, F, G T6/T5; Class III
Type 4
Hazardous locations: indoor/outdoor
D-LX 200 ../86ExCl. I, Div. 2, Gr. A, B, C, D T6/T4
Cl. II, Div. 2, Gr. E, F, G T6/T4; Class III
Type 4
Hazardous locations: indoor/outdoor
Max. ambient temperature+85°C (/85Ex)
+65°C (/86Ex)
Protection classIP66
DimensionsØ120 mm, length appr. 310 mm
Weightapprox. 3.2 kg


  • Optical adjustment aid for the alignment of the swivel mount on the sighting tube (D-ZS 118)
  • Set of orifice plates for insertion in purge air flange (D-ZS 113 Set)
  • LED bar graph display for the flame intensity (D-ZS 129)
  • UV-A, UV-B and IR-test light source 230 V/50 Hz (D-ZS 093)
  • Swivel mount for the alignment of the flame monitor (D-ZS 033-I)
  • Thermal isolator with electrical insulation (D-ZS 117-I)
  • Ball valve for closing the sighting tube (D-ZS 133-I)
  • Terminal box for connecting the flame monitor (D-ZS 140-12)
  • Wide range power supply unit for supply of several D‑LX 200 (D-NG 24/25a)
  • D-LX 200 Test kit for software supported tests of the compact flame monitors D-LX 200/720

Варианты связи с Вами