Human senses and human body

          Human senses and human body

Photometry is the measurement of light in terms of its perceived brightness to the human eye. Photometric quantities derive from analogous radiometric quantities by weighting the contribution of each wavelength by a luminosity function that models the eye's spectral sensitivity. For the ranges of possible values, see the orders of magnitude in: illuminance, luminance, and luminous flux.

·     Lux meter for measuring illuminance, i.e. incident luminous flux per unit area

·   Luminance meter for measuring luminance, i.e. luminous flux per unit area and unit solid angle

·    Light meter, an instrument used to set photographic exposures. It can be either a lux meter (incident-light meter) or a luminance meter (reflected-light meter), and is calibrated in photographic units.

·    Integrating sphere for collecting the total luminous flux of a light source, which can then be measured by a photometer

      Densitometer for measuring the degree to which a photographic material reflects or transmits light

·     Concentration or partial pressure of carbon dioxide in the respiratory gasesSpirometer

·     Capnograph

·     Electroencephalograph records the electrical activity of the brain

·     Ergometer

·    Body fat meter       See also: Category:Physiological instruments and Category:Medical testing equipment.Computed tomography

·       Magnetic resonance imaging

·       Medical ultrasonography

·       Radiology

·      Tomograph, device and method for non-destructive analysis of multiple measurements done  on a geometric object, for producing 2- or 3-dimensional images, representing the inner   structure of that geometric object.

·        Radio antenna

·        Telescope

·        Aktograph measures and records animal activity within an experimental chamber.

·     Checkweigher measures precise weight of items in a conveyor line, rejecting under or    overweight objects.

·     Densitometer measures light transmission through processed photographic film or transparent material or light reflection from a reflective material.

·         Force platform measures ground reaction force.

·         Gauge (engineering) A highly precise measurement instrument, also usable to calibrate other instruments of the same kind. Often found in conjunction with defining or applying technical standards.

·         Gradiometer any device that measures spatial variations of a physical quantity. For example, as done in gravity gradiometry.

·         Parking meter measures time a vehicle is parked at a particular spot, usually with a fee.

·         Postage meter measures postage used from a prepaid account.

·         S meter measures the signal strength processed by a communications receiver.

·         Sensor, hypernym for devices that measure with little interaction, typically used in technical applications.

·         Spectroscope is an important tool used by physicists.

·         SWR meter check the quality of the match between the antenna and the transmission line.

·         Time-domain reflectometer locates faults in metallic cables.

·         Universal measuring machine measures geometric locations for inspecting tolerances.

·         Tricorder, a multipurpose scanning device, originating from the science-fictional Star Trek series.

·         Sonic Screwdriver, a multifunctional device used occasionally for scanning, originating from the science-fictional Doctor Who series.

    Brightness: photometrySight

              Respiratory system (lung and airways controlling the breathing process)

             Nervous system (nerves transmitting and processing information electrically)

             Musculoskeletal system (muscles and bones for movement)power, work of muscles

             metabolic system

             Medical imaging

             See also Category:Meteorological instrumentation and equipment.

            See also Category:Navigational equipment and Category:Navigation. See also Surveying                     See also Astronomical instruments and Category:Astronomical observatories.

Some instruments, such as telescopes and sea navigation instruments, have had military applications for many centuries. However, the role of instruments in military affairs rose exponentially with the development of technology via applied science, which began in the mid-19th century and has continued through the present day. Military instruments as a class draw on most of the categories of instrument described throughout this article, such as navigation, astronomy, optics and imaging, and the kinetics of moving objects. Common abstract themes that unite military instruments are seeing into the distance, seeing in the dark, knowing an object's geographic location, and knowing and controlling a moving object's path and destination. Special features of these instruments may include ease of use, speed, reliability and accuracy.

Fictional devices

MeteorologyNavigation and surveyingAstronomyMilitaryUncategorized, specialized, or generalized application