Electricity and Control July 2025

Measurement + instrumentation

used as a fuel in power generation and, alternatively, the methane can be used for industrial processes or converted into other energy forms. Understanding the challenge Lake Kivu presented an unusual set of challenges for instrumentation, considering the extreme underwater environment. Instrumentation in this environment must deal with high pressure, low light, and corrosive conditions. Precise monitoring of gas levels and interfaces for safety and e›iciency are critical, as is continuous operation in this demanding environment. The instrumentation solution The VEGABAR 82 pressure transmitter was used for di›erential pressure measurement, the key to monitoring gas levels in the lake. It o›ers high precision and ensures accurate data for decision-making. With its rugged design it can withstand the harsh underwater environment. The VEGAFLEX 81 level sensor is equipped with guided wave radar technology – ideal for level measurement in liquids and gases. Its accurate interface detection is essential in determining the gas-liquid boundary. VEGA instrumentation is known for its reliable operation which, in this application, ensures consistent performance in challenging conditions. The instruments are housed in bypass chambers which provide a controlled environment for their operation. The 180-metre cable of the VEGAFLEX 81 allows for data transmission from the underwater instruments to the surface control system. Real-time data received from the sensors is used to monitor gas levels, calculate extraction rates, and implement safety protocols. VEGA sensors o›er an early warning system where accurate gas level monitoring enables early detection of potential gas eruptions. It allows for optimised extraction rates at Lake Kivu, as precise measurements allow for e›icient gas extraction without compromising safety. The VEGA instruments deployed in this application are key in managing the environmental impact of the

extraction process, as monitoring gas levels helps prevent gas leakage and protects the lake ecosystem. The successful deployment of the VEGA sensors in this challenging environment represents a significant technological advance in data transmission and seamless integration in the extraction processes, as reliable data transfer over long distances underwater was essential for the project’s success. The seamless integration of instrumentation with the overall extraction system optimises operations, reducing costs and increasing safety. The instruments are housed in bypass chambers, which provide a controlled environment. The 180-m-long VEGAFLEX 81 cable allows for real-time data transmission to the surface control system.

The use of VEGA instrumentation in the Lake Kivu methane extraction project demonstrates the critical role of advanced technology in addressing complex engineering challenges. By providing accurate and reliable measurement data, VEGA contributed to the safe and e›icient development of this valuable energy resource.

For more information visit: www.vega.com/en-za

The robust VEGABAR 82 pressure transmitter measures differential pressure, delivering precise and reliable data.

JULY 2025 Electricity + Control

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