D-UG 120

Control unit

Self-monitoring and fail-safe control unit for the monitoring of gas, oil and coal flames with DURAG UV, UV+IR or IR flame sensors, primarily in single burner furnaces.


  • Suitable for intermittent Operation and continuous operation
  • LED display
  • Installation on DIN-rail


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

Technical Data

Operation modeIntermittent operation, continuous operation,
72-hour operation without permanent supervision
SafetySelf-monitoring and fail-safe
Power supply24 VDC
Flame relay1x NO contact, 230 VAC, 2 A
Status relay1x NO contact, 230 VAC, 2 A
InstallationTS 35 DIN-rail
Safety time1 s
Configurable switching thresholds1
Threshold setting0...9
Flame sensor1
Flame intensity0/4...20 mA
Perm. ambient temperature-20...+60°C
Dimensions100 x 75 x 118 mm (WxHxD)
Weightapprox. 0.45 kg


  • Power supply unit for connecting the D-UG 120 to 230VAC (D-NG 24/05)
  • Digital display for optimal adjustment of the flame sensors by measuring
    the pulse rate and its extreme values (D-ZS 087 - 20)
  • 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 flame monitor (D-ZS 140 / 141)

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