noun
definition
A device capable of registering a specific substance or physical phenomenon, and that optionally sounds an alarm or triggers a warning.
example
Smoke detectors are mandatory in public buildings.
Examples of detector in a Sentence
Running the lie detector, no doubt.
One form such a detector takes is the bolometer.
Wilson constructed various forms of electric wave detector depending on this same principle.
It was then proposed to arrange a detector so that it was affected by the algebraic sum of the two oscillations, and by swivelling round the double receiving antennae to locate the direction of the sending station by finding out when the detector gave the best signal.
An opportunity to listen to bats using our bat detector.
An optical telescope is used with a special detector called a bolometer placed at its focus.
The latter is determined by the lens aperture, CCD integration time, and the sensitivity of the silicon CCD detector.
First Floor Landing - Loft access, smoke detector, textured ceiling.
This research is done with the Tevatron collider at Fermilab near Chicago, using the CDF detector, together with Sinead Farrington.
A highly collimated beam of gamma-ray photons is made incident upon a detector crystal.
Each detector had a co-aligned stainless steel collimator yielding an elliptical field of view 1 x 1.8 degrees.
Conventional SPECT data was also acquired for these phantoms using the camera's scintillation detector with a lead collimator.
Relative to the number of elements in the detector the discrete cosine proves inefficient, particularly with regard to modulation information.
If the proton had a mean life of years, how many proton decays would there be per day in the detector?
Garys detecting.co.uk - Offering a wide range of metal detecting information,including detector field tests and reviews.
A rub-down body search if you trigger the detector, or are randomly picked to be searched.
On a heterodyne bat detector the calls are a machine-gun like series of regular clicks for bursts of 5 to 10 seconds.
Mains fed smoke detector with battery back up fitted to hall.
Do you need a license to use a metal detector?
Where was our carbon monoxide detector, you ask?
A lithium drifted silicon X-ray detector with high energy resolution enables these characteristic X-rays to be identified as coming from specific elements.
A calibrated p-type silicon diode detector was used to measure the dose received by the patient in the center of the field.
Results have been used to perform quantum efficiency and escape intensity analysis for various detector sizes over a wide energy range.
The quantum eraser also works by seeking an entanglement of the particle motion with the detector.
The light exiting the echelle grating then enters a three lens objective where it is focussed onto a detector array.
Window to side, smoke detector, single socket, stairs to ground floor, loft hatch.
More infrared radiation reaches the detector resulting in crisp infrared radiation reaches the detector resulting in crisp infrared images.
Using the Garbage Collector as leak detector The garbage collector may be used as a leak detector.
The beam delivery system is an important part of the accelerator that lies between the main linac and the detector interaction region.
However, with a count rate of counts s -1 arcsec -2 the dark count rate of the detector is generally negligible.
The new hardware design is based around a commercial off-the-shelf CCD camera head with a back illuminated detector.
The counters cover the cylindrical walls surrounding the tracking volume of the detector and provide partial of the top and bottom end caps.
A new silicon avalanche photodiode photon counting detector module for astronomy.
The measurement of black body temperature therefore links the primary spectral radiance and irradiance scales to primary detector scales.
More infrared radiation reaches the detector resulting in crisp infrared images.
Each detector uses two Philips Photonics [10] low noise glass MCPs with resistive anode readout [8] .
A smoke detector was fitted put did not activate so crews fitted a new smoke detector before leaving.
Additional features include a mains operated smoke detector, and perhaps an extractor fan.
Fire precautions Does the workplace have a smoke detector?
The flat was fitted with a working smoke detector.
The Council will fit a hard-wired smoke detector in your property if these are not already present.
The position of the detector can be adjusted within the tube by the slots and the brass studding.
The Archbishop of Canterbury using a metal detector to locate a carpet tack stuck to a horse.
To achieve this, negative feedback is applied to the optical tweezer to compensate for bead movements measured by the position detector.
For charged decays the detector is capable of reconstructing the position of the decay vertex.
The fifth type of wave detector depends upon the peculiar property of rarefied gases or vapours which under some circumstances possess a unilateral conductivity.
In 1902 Marconi was able to transmit a large number of messages across the Atlantic, receiving them by means of his magnetic detector.
At lower power levels a vacuum thermopile and a pyroelectric detector, both with windows and higher sensitivity, maintain the relative response scale.
The figure above is a schematic description of the quadrant detector.
The charcoal detector was positive, but the rhodamine B was not.