Hydrogen Flame Detector – D-LE 701

DURAG GROUP

Self-monitoring and fail-safe flame sensor with fibre-optic connection
Monitoring of gas, oil, and coal flames
Connection to D-UG 120, D-UG 660 control unit, and D-GF 150 (-MB) burner control
Spectral range from UV to IR
Uniform output signal for mutual interchangeability

The D-LE 701 and D-LE 703 Flame Sensors are advanced flame monitoring systems designed for industrial applications. These sensors utilize a fibre optic system to transfer flame radiation from the combustion area to the sensor, which generates a signal proportional to the flame intensity. They are self-monitoring and fail-safe, ensuring reliable operation in conjunction with control units or burner controls. The sensors are compatible with a wide range of fuels, including gas, oil, and coal, and can be adjusted for different combustion technologies such as exhaust gas recirculation. They are suitable for challenging installation conditions and are certified with DVGW, EAC, and SIL3. These sensors are ideal for use in power stations, chemical industry, refineries, cement plants, waste incinerators, steam generators, and heating plants. The sensors are available in flexible or rigid fibre optic systems, with options for different protection ratings and operational modes.

Use Cases

Burners with difficult installation conditions for conventional flame sensors or on those where ambient temperature near the sighting tube is very high
Power stations
Chemical industry
Refineries
Cement plants
Waste incinerators
Steam generators
Heating plants
Hydrogen burner monitoring (100% H2 or H2-mix fuels)

Capabilities

Self-monitoring and fail-safe flame sensor with a fibre-optic connection in conjunction with a control unit/ burner control
Monitoring of gas, oil and coal flames
Connection to the D-UG 120, D-UG 660 control unit and the D-GF 150 (-MB) burner control
Adjustable to different combustion technologies such as exhaust gas recirculation
Certifications DVGW, EAC, SIL3

DURAG GROUP DURAG GROUP, a German gas analysis and measurement technology company, supports hydrogen purity monitoring through its subsidiary AP2E's ProCeas gas analyzers, which have been developing hydrogen industry solutions since 2015 and participated in the EU-funded MetroHyVe research project for controlling hydrogen purity per ISO 14687:2019. The ProCeas gas analyzer, based on patented OFCEAS (Optical Feedback Cavity Enhanced Absorption Spectroscopy) technology combined with low-pressure sampling (LPS), monitors trace-level impurities such as CO, HCHO, NH3, H2S, COS, and H2O at hydrogen refueling stations, providing real-time contaminant detection compliant with ISO 14687, EN 17124, ISO 19880, and Northern Lights CCUS specifications with no drift and no recalibration required. SGS France's laboratory in Harfleur uses ProCeas devices to monitor hydrogen purity for mobility applications (grade D, 99.97% purity), quantifying 14 different impurities from ppb to ppm levels in a single sample injection. DURAG GROUP also provides H2-ready combustion control and safety solutions including customized burners, igniters, flame scanners supporting up to 100% hydrogen fuel mixtures, and video/thermography monitoring systems for safe, reliable operation with complex and variable fuel mixtures.

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