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D-LX 101/701
Optical compact flame monitor for single burner flames

Easy, versatile and flexible compact flame monitor with integrated UV or IR flame sensor for monitoring gas, oil and coal flames. Particularly for applications with single burner view.


Functionality: Optical flame monitoring

  • Wide temperature range: –20 °C to 60 °C (EX –40 °C … +85 °C)
  • Can be used without additional accessories
  • Two-channel control unit for optimum safety combined with high availability
  • Flame ON/OFF contact for the flame signal (normally open)
  • D-LX 110 and D-LX 710: Variants for direct view or for combination with fiber optic systems
  • Easy replacement of wear parts
  • Easy access to the available settings reduces the time required for commissioning
  • Choice of available detectors allows monitoring of the most common fuels
  • If the requirements for the plant change (Ex zones, need for fiber optic systems), exchange within the same device family is usually possible
  • Simple combustion plants with single burners or optically separated burners
  • Combustion processes in continuous operation
  • Technical data
Spectral sensitivityUV, IR
Operating modeIntermittent operation and continuous operation
Switching thresholdFlame intensity
Local displayLEDs – always visible at a glance for all versions
Flame failure detection time (FFDT)1, 2, 3, 5 s
Flame ON/OFF contact1x NO contact
Ready for operation contact1x NO contact
Switching capacity of relay contactsMax. 24 VDC, 0.5 A
Analogue output0/4 … 20 mA
Opening angle6 °
Electrical data24 VDC, 5 W, PELV
Ambient conditions-20 … +60 °C / EX -40 … +85 °C
Degree of protectionIP65
ConnectionsSight tube: G 1¼″ or NPT 1¼″, F Purge air: G ½″ or NPT ½″, F
DimensionsHousing P2: 80 x 80 x 250 mmHousing M5: 80 x 80 x 260 mm Housing M4: Ø 120 mm, length approx. 310 mm
WeightHousing (without cable) P2 approx. 1,2 kgM5: approx. 1.2 kg M4: approx. 3.2 kg
Explosion protectionD-LX 101/701 ../84Exll 2G Ex db llC T6 or T5 Gb ll 2D Ex tb lllC T85 °C or T100 °C Db
DetectorsIG, UA, UAF
  • Optional
Power supply unit 24 V
D-NG 24/05
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