The scientists also wired the building with heat and gas sensors that could withstand fire.

NEWYORKER: Trial by Fire

Billy Boyle's start-up business Owlstone makes gas sensors on a microchip which can detect anything from explosive to disease.

BBC: Start-up Britain - Cambridge v Tech City

The electronic nose is an array of nano-scale gas sensors--the maximized surface area of the nano-particles allows the most gas to pass over them--along with pattern recognition technology that can create a digital fingerprint (or noseprint, as the case may be) of specific smells.

FORBES: Magazine Article

If the new route is longer, you may need gas and the sensors will help you locate the closest or cheapest available resource.

FORBES: How Sensor Networks Add to Context

Thousands of centrifuges are needed and the engineering is tricky, but the process is more easily hidden, with reasonable electrical requirements and no heat or gas that can be detected by sensors.

ECONOMIST: Asia.view

These, he says, are 1, 500 times better than existing sensors at detecting hydrogen. (The gas combines with the tubes, changing their electrical properties.) Hydrogen detection is used to help control certain processes in industrial food production, for tweaking fuel combustion in car engines, and in monitoring certain bacterial infections.

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The repair shop put an engine on a test bed, attached sensors, hooked it to computers, and tried every possible combination of gas and air.

FORBES: Institutional Stupidity, III