Green hydrogen instrumentation and online analyzer

Green hydrogen production processes require instrumentation and online analyzers for accurate monitoring and control. Sensors, analyzers, and transmitters are used to measure conductivity, temperature, level, pressure, and flow in hydrogen electrolysis production processes

PEM electrolyzer

A PEM (Proton Exchange Membrane) electrolyzer is a type of electrolyzer that uses a solid polymer electrolyte membrane to facilitate the electrolysis process. It is commonly used for the production of hydrogen gas (H2) from water (H2O).

Typical application scenarios

PEM electrolyzer pressure monitoring

Using a pressure transmitter, the pressure in the water inlet pipe on the oxygen side and the exhaust pipe on the hydrogen side can be monitored.
SenTec relative, differential and absolute pressure field instrument design with stainless steel cell with EX certified and gold coating option, membrane options to protect against hydrogen diffusion

PEM electrolyzer flow monitoring

SenTec offs 5 different flow measurement technologies, electromagnetic, Coriolis, ultrasonic, vertex, and differential pressure for water demineralization plant and hydrogen applications. Clamp-on ultrasonic flow meter with non-invasive measurement against H2 diffusion and embrittlement.

PEM electrolyzer temperature measurement

Intrinsically safe, flameproof design temperaature transmitter, sensors and clamp-on temperature measurement solutions for vessels and pipe from simple applications to sophisticated solutions. Clamp-on solutions to reduce potential hydrogen leakage.

Level measurement in PEM electrolyzers

In electrolysers, water (H2O) is decomposed into hydrogen (H) and oxygen (O) with the help of electricity generated from renewable energy sources. Green hydrogen is produced from this and does not emit CO2 during its production. In the PEM electrolyzer, a proton exchange membrane is used and ultrapure water is injected. The protons pass through the proton membrane under the action of voltage, hydrogen is released from the cathode, and oxygen is released from the anode. On the oxygen side, a liquid level gauge is used to control the amount of ultrapure water; on the hydrogen side, a liquid level gauge is used to monitor excess water volume.

PEM electrolyzer field instrument

Features

PEM electrolyzer field smart instrumentation are used to gather data on various parameters such as temperature, pressure, flow rate, voltage, and current during the electrolysis process. They provide valuable information for optimizing the performance and efficiency of the electrolyzer, ensuring safe operation, and troubleshooting any issues that may arise.

Benefits

Free customization

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Pressure sensor

Temperature sensor

Level sensor

Green hydrogen storage and transportation

Green hydrogen storage and transportation are essential components of a sustainable hydrogen infrastructure. Currently, hydrogen is transported from production sites to end-use locations through various methods.

Typical application scenarios

Hydrogen storage tank pressure measurement

Hydrogen storage tanks can store different capacities of hydrogen depending on their size, and can be used in hydrogen refueling stations or hydrogen transportation. To store as much hydrogen as possible, the tanks are pressurized up to 1,000 bar. But at room temperature, hydrogen is always in the gaseous state. Using a pressure transmitter, the pressure can be measured and controlled accordingly.

Measuring liquid flow and level in liquid hydrogen storage tanks

When storing hydrogen, it must be cooled to -253°C at 1 bar to keep it in the liquid state in order to minimize losses. Liquid hydrogen is generally stored in insulated double-layer tanks filled with gaseous hydrogen above the liquid level. As soon as liquid hydrogen leaves the insulated container, it vaporizes and heats up to ambient temperature, so that level and flow can be reliably measured by means of the widely used differential pressure principle.

Measuring pressure, temperature, flow in hydrogen pipelines

In the hydrogen industry, hydrogen pipelines are used to transport hydrogen from the point of production to storage and later to the point of demand. Reliable pressure monitoring is essential during this process.