Dear Aspirants, here we provide a **Measuring Instrument** and their uses which are helpful for all students and for all competitive examinations like Railway NTPC, JE, Group-D, SSC, and state PSU. Different Instrument has different work properties.

## List of Measuring Instrument

**Accelerometer**– It measures physical acceleration

**Actino meter**– It measures the heating power of sunlight.

or measure the intensity of solar radiation

**Alcholmeter** – It measures alcoholic strength of liquids

**Altimeter** – It measures altitude sand is used in aircrafts

**Ammeter** – It measures the strength of the electric current.

**Anemometer**– It measures the speed and velocity of the wind.

**Audimeter** – It measures hearing or least audible sound.

**Audiometer** – It measures the intensity of sound

**Audiophone**– It is used for improving the imperfect sense of hearing

**Barkometer**– It measures tanning liquors used in tanning leather

**Barograph** -It measures continuous recording of atmospheric pressure

**Barometer** -It measures the atmospheric pressure

**Bevameter** – It measures the mechanical properties of soil

**Binocular** – The device used to view distant objects.

**Bolometer** – It measures thermal radiation

**Brannok Device** – It measures shoe size

**Breathalyzer** – It measures breath alcohol content Caliper distance

**Calorimeter** – It measures the quantity of heat

**Carburettor**– It is used in an internal combustion engine for charging the air with pet vapour.

**Cardiogram** – It traces movements of the heart. Recorded on a cardiograph

**Cathetometer**– It measures vertical distances

**Ceilometer**– It measures the height of a cloud base

**Chronometer** – It determines the navigation and longitude of a place.

**Chronometer** –it measures the right time in ships/streamers

**Clap-o-meter**– It measures the volume of applause

**Colorimeter**– It measures color

**Compass** – It is an instrument used by the sailors to determine the direction.

**Creepmeter** – It measures slow surface displacement of an active geologic fault in the earth

**Crescograph**– It measures the growth in plants

**Cyclotron**– A charged particle accelerator which can accelerate charged particles high energies

**Declinometer** – It measures magnetic declination

**Densimeter** – It measures the specific gravity of liquids

**Densitometer**– It measures degree of darkness in photographic or semitransparent material

**Dialtometer**– It measures volume changes caused by a physical or chemical process

**Diffractometer**– It measures the structure of crystals

**Disdrometer**– It measures size, speed, and velocity of raindrops

**Dosimeter** – It measures exposure to hazards, especially radiation; radiation of item

**Dynamo** -.It converts mechanical energy into electrical energy.

**Dynamometer** –It measures electrical power

**Electricity** **Meter**– It measures electrical energy Electrometer – It measures the potential difference

**Electronic** **Tuner** – It measures the pitch of musical notes

**Electroscope** – The device that confirms/detect the presence of electric charge.

**Ellipsometer**– It measures refractive index, dielectric function, the thickness of thin films

**Endoscope** –It examines the internal parts of the body.

**Eudiometer** – It used for measuring volume changes in the chemical reaction between gases.

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**Eudiometer** – It measures change in volume of a gas mixture following combustion

**Evaporimeter** – It measures rate of evaporation

**Fathometer** – It measures the depth of the sea and ocean.

**Frequency** **Counter**– It measures Frequency Of Alternating Current

**Fuel** **Gauge**– It measures fuel levels

**Galvanometer** – It measures the low magnitude electric current.

**Gas** **Pycnometer**– It measures volume and density of solids

**Geiger** **Counter**– It measures ionizing radiation Glucometer – It measures blood glucose

**Graphometer** – It measures angles

**Heliometer**– It measures variation of the sun’s diameter

**Hydrometer** – It measures the specific gravity of liquids.

**Hydrophone**-It measures sound under water

**Hygrometer** – It measures humidity in air

**Inclinometer**– It measures angle of a slope

**Infrared** **Thermometer**– It measures heat radiated

**Interferometer**– It measures wave interference

**Katharometer** – It measures composition of gases

**Kymograph** – It graphically records physically movements of cell.

**Lactometer**– It determines the purity of milk.

**Light** **meter**– It measures light in photography.

**Lux** **meter**– It measures intensity of light.

**Magnetometer** – It measures strength of magnetic fields

**Manometer**– It measures the pressure of gases.

**Mass** **Spectrometer**– It measures masses of ions, used to identify chemical substances through their mass spectra

**Megger**– It measures electrical insulation

**Mercury** **Barometer**– It measures Atmospheric pressure

**Micrometer** – It measures small distances

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**Microphone** – It converts the sound waves into electrical vibrations and magnify the sound.

**Microscope** – It is used to obtain magnified view of small object.

**Multimeter**– It measures electrical potential, resistance, and current

**Nephelometer**– It measures particle in a liquid

**Nephoscope** – It measures the speed and direction of clouds

**Odometer** – It measures the distance covered by wheeled vehicles.

**Ohmmeter** – It measures electrical resistance Orchidometer- It measures testicle size in male humans

**Oscilloscope** – It measures oscillations

**Osmometer** – It determine the concentration of osmotically active particles that reduce the vapor pressure of a solution.

**Parking** **Meter**– It measures collects moneys for vehicle parking rights in a zone for a limited time

**Pedometer**– It measures steps PH meter pH (chemical acidity/basicity of a solution)

**Periscope** – It is used to view object above sea level (used in sub-marines)

**Phonograph**– An instrument for producing sound.

**Photometer** -It measures the strength of electromagnetic radiation in the range from ultraviolet to infrared and including the visible spectrum. .

**Planometer** – It measures area

**Polarimeter**– It measures rotation of polarized light

**Potentiometer**– It measures voltage (term is also used to refer to a variable resistor)

**Profilometer** – It measures surface roughness Protractor angles

**Psychrometer** – It measures humidity

**Pycnometer** – It measures fluid density

**Pyranometer**– It measures solar radiation

**Pyrheliometer** – It measures direct solar insolation

**Pyrometer**-It measures very high temperature.

**Radar**– It measures the speed and direction of far aircraft.

**Radiometer**– It measures the emission of radiant energy.

**Rheometer**– It measures response to applied forces

**Rain** **Gauge**– An apparatus for recording rainfall at the particular place.

**Refractometer**– it measures refractive index.

**Rotameter** – It measures pressure of a liquid or gas in a closed tube

**Saccharometer** – It measures amount of sugar in a solution

**Salinometer**-It determines salinity of solution.

**Seismograph**– it measures the intensity of earthquake shocks.

**Sextant**– This is used by navigators to find the latitude of a place by measuring the elevation above the horizon of the sun or another star.

**Spectrometer**– it measuring the energy distribution of a particular type of radiation.

**Spectrophotometer**– It measures intensity of light as a function of wavelength

**Speedometer**– it records the speed of a vehicle .

**Spherometer**– It measures the curvatures of surface.

**Sphygmomanometer** – It measures blood pressure

**Spirometer** – It measures the lung capacity

**Stadimeter**– It measures object range

**Stereoscope**– It is used to view two dimensional pictures.

**Stethoscope**– It measures heart and lung sounds.

**Strainmeter** – It measures seismic strain

**Stroboscope**– It measures to view rapidly moving objects

**SWR** **meter**– It measures standing wave ratio

**Tachometer**– This instrument used in measuring speed of aero planes and motor boats.

**Taximeter** – It measures distance travelled, displacement

**Telescope**– It views distant objects in space.

**Tensiometer** – It measures surface tension of a liquid

**Theodolite**– it measures horizontal and vertical angles.

**Thermometer**– It measures temperature

**Thermostat**– This device regulates the temperature at a particular point.

**Tiltmeter** – It measures minor changes to the Earth

**Tintometer**– It measures colour Vacuum Gauge very low pressure Viscometer viscosity of a fluid

**Viscometer**– It measures the viscosity of liquids.

**Voltmeter**– It measures the electric potential difference between two points.

**Watt** **Meter**– It measures electrical power

**Wind** **Vane** – It measures wind direction

**Zymometer**– It measures fermentation.