Any of various devices for detecting the presence of electric waves.
A device for sensing vehicles and collecting traffic data. A detector may be embedded in the roadway pavement (e.g., inductive loop detector) or placed above the roadway (e.g., passive acoustic detector).
A device by which vehicle or pedestrian traffic registers its presence. The most common detectors are the inductive loop detectors for vehicles and the push-button detectors for pedestrians.
A device used for temperature sensing consisting of a wire coil or deposited film of pure metal for which the change in resistance is a known function of temperature. The most common type is nickel, with other types being copper, platinum, and nickel-iron.
The photodiode in optical receivers
A device used for counting and measuring the properties of one or more particles produced in an experiment.
A device that picks up light from fiber & converts the information into an electrical signal.
A single element of a detector array, which produces an electrical or light signal in response to stimulation by x-rays.
A mixer or converter in a superheterodyne receiver.
Any device that can detect the presence of a particle or nuclear fragment and measures one or more of its physical properties.
In fiber optics, a device, such as a photodiode, that receives an optical signal and generates an electrical signal.
One that detects, especially a mechanical, electrical, or chemical device that automatically identifies and records or registers a stimulus, such as an environmental change in pressure or temperature, an electric signal, or radiation from a radioactive material.
A device sensitive to radiation which produces a current or voltage pulse which may or may not correspond to the energy deposited by an individual photon or particle.
a device, which indicates the presence of the chemical species above a predetermined, threshold value. There is not explicit qualitative relationship between the output and stimulant.
A device used on fibre optic networks used to receive and interpret an optical signal.
A light-sensitive device that produces electrical signals when illuminated.
any device that receives a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it in a distinctive manner
electronic equipment that detects the presence of radio signals or radioactivity
a device used for finding particular substances or things, or measuring their level
a device when activated sets off an alarm to a fire alarm panel and in all cases does not actually sound an alarm
a magnetic loop or some other device that detects vehicle flow for a particular link
a proven device that has saved many lives
a component within the instrument (e.g., TES, mini-TES, or THEMIS) that converts electromagnetic radiation into a recorded signal
The individual chip or wafer that senses infrared energy.
any device which quantitatively responds to a change in its environment (e.g. temperature, pressure, light intensity).
An optoelectronics transducer used in fiberoptics for converting optical power to electric current. In fiber-optics, usually a photodiode.
A device for recognizing the presence and/or the motion of vehicles in a section of the roadway.
A photodiode that converts optical signals to electrical signals.
Any device that senses the presence of an intruder, an intrusion attempt, fire, etc.
A device providing an electrical output that is a useful measure of incident radiation. It is broadly divisible into two groups: thermal (sensitive to temperature changes), and photodetectors (sensitive to changes in photon flux incident on the detector), or it may also include antennas and film. Typical thermal detectors are thermocouples, thermopiles, and thermistors; the latter is termed a bolometer.
A sensing device used for determining the presence or passage of vehicles or pedestrians. (MUTCD)
A device that measures the amount of energy radiated by an object. Can be a thermal detector or a photodetector. Thermal detectors respond to radiation by changing their volume, capacitance, or generation of millivoltages; they can be thermocouples, thermopiles, pneumatic detectors, or bolometers. Their common feature is their relatively slow response. Photodetectors are Semiconductors which produce a signal in proportion to the photon flux which strikes them.
portion of the receiver that demodulates the RF NMR signal and converts it to a lower frequency signal. Most detectors now used are phase sensitive (e.g. quadrature demodulator/detector), and will also give phase information about the RF signal.
Any device used to sense the passage of a particle. Also a collection of such devices designed so that each serves a particular purpose in allowing physicists to reconstruct particle events.
An electronic device that quantitatively discerns the presence of the separated components as they elute. There are different types of detectors. Some of the common detector types are: UV/Visible light absorbance, differential refractive index, electrochemical, conductivity, and fluorescence.
The component of a remote sensing system that converts the electromagnetic radiation into a signal that is recorded.
A device in a radiometer that senses the presence and intensity of radiation. The incoming radiation is usually modified by filters or other optical components that restrict the radiation to a specific spectral band. The information can either be transmitted immediately or recorded for transmittal at a later time.
A device for detecting particular electrons or photons in the electron microscope.
A scanning shoe carrying one or more transducers. It is used to protect transducers from mechanical damage.
A device that determines the presence of or measures the amount of energy, such as radiation.
A device or series of devices to used to measure nuclear particles and radiations.
An opto-electric transducer used in fiber optics to convert optical power to electrical current. In fiber optics, usually a photo diode.
A device at the receiving end of a fiber optic system that converts incoming optical pulses into electrical signals, usually a photodiode.
An electronic transducer used in fiber optics for converting optical power to electric current. In fiber optics, usually a photodiode.
A device that is sensitive to radiation and can produce a response signal suitable or measurement or analysis. A radiation detection instrument.
An electronic device that responds in a predictable way to electromagnetic or mechanical parameter such as light, current, or voltage.
A device which sends a signal to the control panel indicating a change of state (Normally Closed[NC] to Open circuit or Normally Open [NO] to Closed circuit).
Name given to a device that performs some type of quantitation of a signal from a tagged molecule.
One of the seven basic components of an HPLC system; responsible for providing quantitative data regarding the presence of the separated sample components as they pass through its flow cell.
the part of the instrument that converts radiant energy from the light source to electricity. Typically a photomultiplier tube, but may also be a solid-state detector in more modern instrumentation.
A transducer that provides an electrical output signal in response to an incident optical signal. The current is dependent on the amount of light received and the type of device.
An opto-electric transducer used to convert optical power to electrical current. Usually referred to as a photodiode.
A passive RF component used to convert an RF power signal into a voltage signal. It is used to supply a voltage, which is proportional to the RF power signal, to another component or piece of test equipment which is not designed to handle an RF power signal.
A detector is a device that recovers information of interest contained in a modulated wave. The term dates from the early days of radio when all transmissions were in Morse Code, and it was only necessary to "Detect" the presence (or absence) of a radio wave using a device such as a coherer; not necessarily making it audible.