Allengra presents ultrasonic flow sensors for optimizing alkaline electrolysis at the World Hydrogen Summit & Exhibition
Ravenstein, May 15, 2025– The efficient production of green hydrogen depends heavily on the precise control of electrochemical processes. Allengra, a specialist in intelligent ultrasonic flow measurement, will showcase its latest solution for monitoring KOH electrolyte flows in alkaline water electrolysis at the World Hydrogen Summit & Exhibition, taking place May 20–22, 2025 in Rotterdam.

Alkaline electrolysis uses potassium hydroxide (KOH) to efficiently split water into oxygen and hydrogen. The typical concentration of KOH in the electrolyte is around 30 %. This requires a delicate balance: higher KOH concentrations increase conductivity but also raise the risk of corrosion to system components. Continuous, accurate measurement of both flow rate and KOH concentration is therefore critical for ensuring efficiency and system longevity.

Allengra’s ALSONIC plastic ultrasonic flow sensor offers a highly accurate and maintenance-free solution for this task. In addition to measuring flow, the sensor detects the speed of sound in the medium—a parameter that varies depending on KOH concentration. This enables inline concentration monitoring without the need for additional chemical analysis.

For comparison: the speed of sound in pure water is approximately 1485 m/s, while in potassium hydroxide solution it can reach up to 2286 m/s—a measurable difference that Allengra sensors can detect with an accuracy of about 1 m/s.

Illustration: Schematic of alkaline water electrolysis using potassium hydroxide (KOH) as the electrolyte.

Key advantages at a glance:

● Non-invasive & maintenance-free: No moving parts or direct contact with aggressive media
● Real-time monitoring: Immediate response to changes in operating conditions
● Combined measurement: Flow and KOH concentration in one device
● Chemical resistance: ALSONIC plastic sensor with seal-free PPS design, ideal for aqueous KOH solutions

“Accurate control of KOH concentration is a key factor for the efficiency and service life of electrolysis systems,” explains Jan Wessels, Product Manager at Allengra. “Our sensor solutions make a vital contribution to quality assurance and process optimization in hydrogen production.”

Visit Allengra at the World Hydrogen Summit & Exhibition 2025 in Rotterdam, Booth E56B5 at the German Pavilion, and experience the sensor solution live in action.

About Allengra Allengra GmbH specializes in the development and production of ultrasonic flow sensors and control valves suitable for both high-end products and cost-efficient mass-production solutions. Since its founding in 2005, the company, headquartered in Germany and Romania, has provided customized solutions for various industries, including heat pumps, coffee machines, industrial automation, and motorsports. With extensive engineering expertise and prototyping capabilities, innovative ideas are quickly transformed into market-ready products.

More at www.allengra.eu

Source:Allengra