Detectors

device that detects smoke, typically as an indicator of fire

right|thumb|Metal filings coherer designed by Guglielmo Marconi, consisting of a tube containing two electrodes spaced a small distance apart, with metal filings in the space between them The coherer was a primitive form of radio signal detector used in the first radio receivers during the wireless telegraphy era at the beginning of the 20th century. Its use in radio was based on the 1890 findings of French physicist Édouard Branly and adapted by other physicists and inventors over the next ten years. The device consists of a tube or capsule containing two electrodes spaced a small distance a

sensor to detect police radars

electronic detector that measures carbon monoxide (CO)

detector that reacts to infrared (IR) radiation

device or circuit that extracts information from a modulated radio frequency current or voltage

early radio receiver component

device that detects the presence of gases in an area

electronic circuit that takes a high-frequency amplitude modulated signal as input and provides an output which is the envelope of the original signal

instrument that measures and compares tastes

instrument that can detect x-rays

sensor designed to detect and respond to the presence of a flame or fire

component with heat-sensitive element that responds to convective thermal energy, for example for fire heat detection

device used in gas chromatography or liquid chromatography

device used to detect the presence of bats

early radio receiver component

an integrated circuit (IC) specifically used for reading detectors of a particular type

magnetic radio wave detector

instrument measuring presence of ice on a surface

detector which draws air through pipes