Consumer & Gadgets

A nanodrone able to detect toxic gases in emergencies

Detecting dangerous gases in collapsed buildings due earthquakes or explosions and locating victims in hard-to-access places are among use scenarios of the Smelling Nano Aerial Vehicle (SNAV), a nanodrone designed and created ...

Automotive

NTSB: Require small planes to have carbon monoxide detectors

U.S. crash investigators are urging the Federal Aviation Administration to require private planes to be equipped with carbon monoxide detectors, citing deadly crashes that were attributed to poisoning by the odorless gas.

Engineering

New standards developed to improve metal-detector testing

Metal detectors now appear routinely in the entrances of many schools, airports and even houses of worship. They serve as portals to correctional facilities, prisons and courthouses, and guards often wave the hand-held models ...

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Sensor

A sensor (also called detector) is a device that measures a physical quantity and converts it into a signal which can be read by an observer or by an instrument. For example, a mercury-in-glass thermometer converts the measured temperature into expansion and contraction of a liquid which can be read on a calibrated glass tube. A thermocouple converts temperature to an output voltage which can be read by a voltmeter. For accuracy, most sensors are calibrated against known standards.

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