Precise syngas and biomethane analysis under EX zone conditions

With the new SWG 100 VA-Ex, MRU Instruments introduces a powerful, stationary gas analysis system designed for continuous syngas applications in hazardous areas classified as Ex Zone 2.

Developed to meet the highest demands in research, energy production, and industrial process control, the system enables precise and safe hydrogen measurements up to 100 vol.%, combined with a complete process gas return and a robust stainless-steel design.

The SWG 100 VA-Ex has been engineered for maximum durability and process reliability. All internal tubing and fittings are made of high-quality stainless steel, while the IP65 stainless-steel housing provides excellent protection for sensitive measuring components against dust, humidity, and aggressive process gases.

An integrated gas cooler with maintenance-free condensate removal ensures stable operation, while the device operates reliably within a pressure range from –100 mbar to +200 mbar.

The regulated gas sampling pump with integrated flow monitoring guarantees a constant and reproducible gas flow. In case of an alarm, a fail-safe relay automatically interrupts the gas supply.

An external power supply unit adds another layer of safety by automatically cutting off power in hazardous situations.

The SWG 100 VA-Ex employs advanced sensor technologies to deliver comprehensive and accurate gas composition data.

Infrared (IR) technology is used for highly selective and stable measurements of CO, CO₂, and CH₄, with each module capable of detecting concentrations up to 100%.

Using thermal conductivity (WLD), hydrogen (H₂) is reliably and precisely measured across the full range up to 100%.

A dedicated paramagnetic sensor (PM) provides accurate readings for oxygen (O₂) between 0 and 25%. 

H₂S monitoring is carried out continuously up to a value of 50 ppm using sensor technology developed in-house by MRU. 

The system also includes an automatic zero calibration via solenoid valve, a calibration gas inlet, and dedicated measurement and zero gas outlets, ensuring seamless operation and minimal maintenance.

A TFT colour display with a membrane keypad and RS-485 (Modbus RTU) interface allows easy, menu-guided operation.

This makes integration into existing control and monitoring systems straightforward. An internal %LEL CH₄ gas detector continuously monitors the internal atmosphere of the housing, ensuring maximum operational safety.

Thanks to its flexibility and precision, the SWG 100 VA-Ex is ideally suited for a wide range of industrial and scientific applications, including biomethane feed-in systems; biomass and waste gasification; coal gasification and liquefaction; synthetic fuel and pyrolysis processes; and steam reforming and laboratory syngas analysis.

Whether used in research facilities, pilot plants, or industrial environments, the SWG 100 VA-Ex delivers highly accurate, continuous measurement results even under the most challenging Ex conditions.