Hitachi has developed a high-performance semiconductor sensor using a mix of platinum and titanium.

The firm believes the mix of metals boosts the sensitivity and the durability of the sensor.

Used to detect traces of hydrogen, the sensor can find amounts as little as 1,000 parts per million.

It can detect the trace of hydrogen within a second and the device lasts for over three years before it needs to be replaced.

An explosive gas, hydrogen could be dangerous without detection, meaning the semiconductor senses could be in high demand as fuel cells become more widespread.

The technology can run on small amounts of power and they usually use palladium, but in this instance Hitachi have opted for a platinum and titanium mix.

Palladium can peel away from the electrode when the concentration of hydrogen is too high and the detection of the gas often takes longer.



Source:

Hitachi develops cutting edge hydrogen sensor, 24/06/08
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