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Durag is one of the market leaders for intelligent solutions in the fields of combustion technology, environmental monitoring, data management as well as tunnel sensors. The company offers modern technology, certified equipment and reliable services tailored to the individual needs of our customers worldwide since 1948.Durag offers durable, safe and stable ignition sources for burners and flares with changing fuels (combustible gases, heating oils or solid fuels) which are characterized by high reliability under demanding conditions.Industrial combustions release considerable energy. By observing the flame our components support the safe and standard conform control and improve the uptime and energy efficiency of the plant.Industry and traffic are today’s major sources of emissions. Using Durag solutions you can precisely measure emissions from industrial plants and reliably monitor the air quality in tunnels.




 Guaranteed electromagnetic compatibility

 No high-voltage cable required on site

 Protection ratings of IP 54 (standard) or IP 65 (special version)

 Rugged, low-maintenance design

 Service friendly design: All electrical components are easy to replace

 Nine burner sizes ranging from 15 kW to 4.5 MW (50,000 BTU/hr to 15,000,000 BTU/hr)

 Built-in flame rod, ideally located

 EC-approved ionisaton flame monitors and burner controls

 Fuel types include natural gas, conditioned coke oven gas, propane/butane or process gas, according to customer preference and analysis

 1-stage, 2-stage or modulated operation

 Wide turn down ratio

 Custom outer tube lengths available in 10-mm increments


 Self-aspirating gas fired igniters guarantee the reliable and safe ignition of main burners in furnaces and boilers if no air supply lines are available. SMITSVONK gas igniters of size Ø54 mm can be equipped with up to five additional gas tubes for increased heat release.

 The design is insensitive to moisture as the initial ignition is based on the proven high energy ignition technology of SMITSVONK. Integrated long-lasting spark plugs and ionisation electrodes assure a long service life with a minimum of downtime for maintenance.

 The intake of combustion air is easily adjusted at all models. If needed the conversion to a forced-air gas fired igniter is possible with little effort.



D-HG 400

The D-HG 400 high energy ignition device is suitable for the ignition of gas or liquid fuels in industrial burners of any capacity.

Available models

 Compact set-up with directly mounted rigid ignition lance

 Compact set-up with push-button for manual ignition

 Separated set-up for wall mounting: Ignition lance connected by high voltage cable

 Separated set-up for hazardous areas with explosion-proof ignition lances

D-ISC 100 XX2 Universal operating unit

 Universal display and operating unit in stainless steel field housing for connecting all new generation DURAG measuring systems. Ease your installation by combining several emission and flow measuring devices with only one operating unit. Realize redundant system setups with the D-ISC 100 easily and efficiently



D-FL 220T

Ultrasonic flow velocity monitor

 Measuring system for continuous evaluation of flow velocity and flow direction in tunnels. Ultrasonic sensors for tunnel ventilation control system. Reliable measurement across the tunnel profile. Two identical sensors alternately transmit and receive ultrasonic pulses. The system evaluates the transition times dependant on direction and calculates flow speed. D-FL 220T requires extremely low maintenance.


Ambient Air Dust Concentration Monitor

 Ambient air particulate monitor to detect TSP, PM10 or PM2.5 in ambient air for use in industrial or governmental ambient air monitoring networks.



D-R 220

Dust and opacity monitor

 Compact and cost effective transmittance dust and opacity measuring device for monitoring medium to high dust concentrations in dry flue and process gas

D-R 290


 The D-R 290 has been used successfully for more than 15 years in various applications as reliable and low maintenance opacity / dust monitor. Now the new generation is available.

 The D-R 290 is a certified optical transmission monitor to measure the opacity or dust concentration of flue gases with medium to high dust concentrations.

 The D-R 290 operates using the double-pass method according to the auto-collimation principle. The light beam traverses the measuring path twice. The attenuation of the light beam by the dust content in the measuring section is measured and evaluated.



D-FW 230 B

Control unit

 supplies D-FW 231 or D-FW 240EX with 24VDC

 includes a display

 allows zero check of D-FW 231 and D-FW 240EX from external

 includes a limit alarm contact

 allows selection of measurement integration

 to be installed in Non Ex area

 can be mounted in a distance of up to 200m to sensor

D-FL 100

Volume flow measuring system

 Reliable measurement of the gas velocity even at high temperatures

 Calculation of volume flow at standard conditions

 Certified, cost effective measuring system

 Versions with or without counter-support and for point measurement

 Extremely low maintenance, maintenance interval 6 months

 Convenient operation via remote access with web Interface



HM-1400 TRX 2

Total Mercury Analyzer

 Continuous mercury measurement

 Measuring principle allows specification of elemental and oxidised mercury

 Automatic reference point check with internal HgCl2 calibration gas generator

 No extremely heated components, easy to maintain

 Smallest certified measuring range 0…15 µg/m3

 QAL1 certified according to EN 15267

D-GF 75 / ASD-75

Burner control

 Controlling and monitoring of gas and oil burners/igniters of any capacity.

 Suitable for intermittent operation (D-GF 75-10, ASD-75 POI) and continuous operation (D-GF 75-20, ASD-75 POD)

 Prepurge of the boiler with changeable prepurge time and optional air pressure check

 Changeable safety times

 Input for external flame monitor

 Optional re-cycling after flame loss in operating position

 (For D-GF 75): Integrated ionisation flame monitor

 (For ASD-75): Input for a 90-110 VDC flame signal



 Module racks


 Digital displays

 Test light sources

 Adjustment aids

 Mounting parts

 and others

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.



D-LX 100

Compact flame monitor

 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

 This pressure switch is a piece of equipment that needs to be integrated into an overriding control system. The pressure switch picks up a pressure and gives out a signal.