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Alkaline electrolyser (AEL)

Level and pressure measurement in the alkaline electrolyser

Process data

Measuring task:
Level measurement
Measuring point:
Measuring range up to:
2 m
Potassium hydroxide solution overlaid with hydrogen or oxygen gas
Process temperature:
0 … +90 °C
Process pressure:
0 … +1 bar
Special challenges:
Aggressive medium, hydrogen diffusion, suitability for oxygen


In the electrolyser, renewable energy is used to split water (H2O) into its individual components hydrogen (H) and oxygen (O). Green hydrogen is thus produced in a CO2-free cycle. In the alkaline electrolyser, potash lye acts as the electrolyte, which is not consumed in the process. Oxygen is produced as a by-product. Level measurement is used to regulate both the concentration of electrolyte and the inflow of water. Highly resistant pressure sensors are used to monitor the overpressure in the two electrolyte tanks, as well as the differential pressure between the two tanks.

Your benefit

Reliable measurement resistant to highly-corrosive potash lye
Cost effective
Precise level and pressure measurement for efficient output regulation
User friendly
Direct installation in the tank or in a bypass tube

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