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Air France is now moving quickly to put in newer versions of the speed sensors. But the cause of the crash is still under investigation.

The sensor array (130) collects data from a pattern (155) using at least one of a capacitive measurement and a radio frequency measurement.

"The Daphnia system is an exquisite aquatic sensor, a potential high-tech and modern version of the mineshaft canary, " he said.

We went up to them with our submersible. We wanted to get a temperature probe, we stuck it in there, looked at it -- it pegged off scale.

Seen through the "eyes" of a satellite sensor, ribbons of Saharan sand dunes seem to glow in sunset colors.

"Smartphones are incredibly powerful devices packed full of sensors, cameras, high-quality microphones with amazing displays, " he said.

He said there appeared a strong possibility that faulty sensors could have caused the crash even if there was no direct link.

In industrial applications, the multiple sensors are often used to measure the same process parameter at different locations of a process.

According to a BBC report, such cars use video cameras mounted on the roof, radar sensors and a laser range finder to "see" other traffic.