Hydrogen Sensor Detects Leaks in Seconds

Handling hydrogen: A new sensor detects even the smallest leaks immediately – apparently energy-efficient, cost-effective, and better than previous models.

Researchers at King Abdullah University of Science and Technology (KAUST) in Saudi Arabia have developed a novel sensor that detects hydrogen leaks in seconds – and could therefore play an important role in the development of a global hydrogen economy.

The sensor uses a semiconducting polymer (DPP-DTT) that is applied to two platinum electrodes. When it comes into contact with hydrogen, the electrical current drops by up to 10,000 times – a clear signal that allows conclusions to be drawn about the hydrogen concentration. The sensor detects traces of hydrogen in concentrations as low as 192 parts per billion, reacts within a second, and requires only around 2 MW of power.

Successful Practical Tests

According to KAUST, the sensor detected leaks in pipes, bursting hydrogen balloons, and even during a drone mission in a contaminated area in practical tests. Sensitivity remained high even in mixtures with other volatile substances such as ethanol and acetone. Only in oxygen-free environments was functionality limited.

Unlike many conventional detectors, the system operates at room temperature without preheating. It also works under various environmental conditions – including changing temperatures and humidity levels – over a period of at least two years. The sensor can be manufactured using screen printing. It has already been patented. The researchers are now planning to collaborate with industry partners to bring the technology to market.

This is a partly automated translation of this german article.