Scientific Instrument and their Uses | Download PDF

Scholarship Examination in India

A scientific Instrument is a tool used for scientific reason and area. Its instrument measures something such as position, temperature, pressure, direction and speed etc. Scientific Instrument is very useful day by day. All competitive examinations such asĀ Railway, UPSC, SSC and Bank asked one or two question related to the scientific instrument. Readers can also download PDF from the link given below.





An instrument used in aircrafts for measuring altitudes

AmmeterMeasures electric current
AnemometerUsed to measure the speed, direction and pressure of the wind.
AudiometerMeasures the intensity of sound
BarographContinuous recording of atmospheric pressure
BarometerMeasures atmospheric pressure and conditions.
BinocularsAn optical instrument used for the magnified view of distant objects.
BolometerMeasures infra-red (Heat) radiation.
CallipersMeasures diameters of thin cylinder/wire.
CalorimeterMeasures quantity of heat
CarburettorUsed for charging the air with petrol vapours in an internal combustion engine.
Cardiogram(ECG)Traces movements of the heart, recorded on a Cardiograph
CathetometerDetermines heights and levels
ChronometerDetermines the longitude of a vessel at sea.
CinematographUsed for projecting pictures on the screen.
ColorimeterCompares intensity of colours
CommutatorUsed in generators to reverse the direction of electric current.
CrescographUsed for measuring growth in plants.
CryometerMeasurement of low temperature.
CyclotronUsed for accelerating charged particles in the microwave oscillator
DilatometerMeasures change in volume of substances
DynamoCoverts mechanical energy into electrical energy
ElectrometerMeasures very small but potential difference in electric currents
ElectrometerUsed for measuring an electrical potential difference.
ElectroscopeDetects the presence of an electric Charge
Electron microscopeUsed to obtain a magnifying view of very small objects (20,000 times).
EndoscopeTo examine internal parts of the body
FathometerMeasures depth of the ocean
FluxmeterMeasures magnetic flux
GalvanometerMeasures electric current
GramophoneUsed to reproducing recorded sound.
HydrometerMeasures the relative density of liquids
HydrophoneMeasure sound under water
HygrometerUsed to measure the moisture content or the humidity of air or any gas.
HygroscopeShows the changes in atmospheric humidity
HypsometerDetermines boiling point of liquids.
LactometerMeasures the relative density of milk.
MachmeterDetermines the speed of an aircraft relative to the speed of sound
ManometerCompares magnetic movement and fields
ManometerUsed to measure atmospheric pressure
MicrometerCoverts sound waves into electrical vibration
MicrophoneConverts sound waves into electrical signals.
MicroscopeUsed to obtain a magnified view of small objects
NephetometerMeasures the scattering of light by particles suspended in a liquid
OdometerAn instrument attached to the wheel of a vehicle, to measure the distance travelled.
OhmmeterMeasures electrical resistance of objects
OndometerMeasures the frequency of electromagnetic waves(radio waves)
OptometerUsed for testing the refractive power of the eye.
OtoscopeUsed for visual examination of the eardrum.
PeriscopeUsed to view objects above sea level (Used in submarines).
PhonographUsed for reproducing sound.
PhotometerCompares the luminous intensity of the two sources of light
PolygraphIt simultaneously records changed in physiological processes such as heartbeat, blood pressure & the respiration (used as lie detector)
PyrheliometerUsed for measuring Solar radiation.
PyrometerMeasures very high temperature.
QuadrantMeasures altitudes and angles in navigation and astronomy
RadarRadio, Detection and Ranging.
Rain GaugeMeasures Rainfall.
RefractometerMeasures salinity of solutions
RefractometerMeasures a Refractive Index of a substance.
SextantUsed by navigators to find the latitude of place by measuring the elevation above the horizon of the sun or another star; also used to measure the height of very distant objects
SextantUsed for measuring the angular distance between two objects.
SiesmographUsed for recording the intensity and origin of earthquakes shocks.
SpectroscopeUsed for Spectrum analysis.
SpeedometerAn instrument used for measuring a speed of the vehicle.
SpherometerMeasures curvature of spherical objects.
SphygmomanometerMeasures blood pressure.
StethoscopeUsed for hearing and analyzing the sound of Heart.
TachometerTo determine speed, especially the rotational speed of a shaft(rpm)
Tangent galvanometerMeasure the amount of direct current(DC)
TelemeterRecords physical happenings at a distant place(space)
TelescopeUsed for the magnified view of distant objects.
ThermometerMeasures Temperature
ThermostatAutomatically regulates temperatures at a constant point.
TonometerMeasures the pitch of a sound
TransformerAn apparatus used for converting high voltage to low and vice-versa without the change in its frequency.
TransponderTo receive a signal and transmit a reply immediately in satellites.
VenturimeterMeasures the rate of flow of liquids
VernierMeasures Small sub-division of scale.
ViscometerMeasures Viscosity of liquid.
VoltmeterUsed to measure an electric potential difference between two points
WattmeterTo measure electric power
WavemeterTo measure the wavelength of a radio wave(high-frequency waves)


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