01.AccumulatorIt is used to store electrical energy
02.AltimeterIt measures altitudes and is used in aircraft.
03.AmmeterIt measures strength of electric current (in amperes).
04.AnemometerIt measures force and velocity of the wind.
05.AudiometerIt measures the intensity of sound.
06.AudiphonesIt is used for improving the imperfect sense of hearing.
07.Barograph It is used for continuous recording of atmospheric pressure.
08.Barometer It measures atmospheric pressure.
09.Binocular It is used to view distant objects
10.Bolometer It measures heat radiation
11.Calorimeter It measures the quantity of heat.
12.Carburettor It is used in an internal combustion engine for charging the air with petrol vapor.
13.Cardiogram It traces movements of the heart, recorded on a cardiograph.
14.Chronometer It determines the longitude of a place kept the onboard ship.
15.Cinematography It is an instrument used in cinema making to throw on screen and enlarged image of the photograph.
16.Colorimeter An instrument for comparing intensities of color.
17.Commutator An instrument to change or remove the direction of an electric current, in dynamo used to convert alternating current into direct current.
18.Cresco graph It measures the growth in plants.
19.Cyclotron A charged particle accelerator which can accelerate charged particles to high energies.
20.Dynamo It converts mechanical energy into electrical energy<
21.Dynamometer It measures force, torque, and power
22.Electroscope It detects the presence of an electric charge.
23.Endoscope It examines internal parts of the body.
24.Eudiometer A glass tube for measuring volume changes in chemical reactions between gases.
25.Fathometer It measures the depth of the ocean.
26.Galvanometer It measures the electric current of low magnitude.
27.Hydrometer It measures the specific gravity of liquids.
28.Hydrophone It measures sound under water.
29.Hygrometer It measures humidity in the air.
30.Kymograph It graphically records physiological movements (Blood pressure and heartbeat).
31.Lactometer It determines the purity of milk.
32.Manometer It measures the pressure of gases.
33.Mariner’s compass It is an instrument used by the sailors to determine the direction.
34.Microphone It converts the sound waves into electrical vibrations and to magnify the sound.
35.Microscope It is used to obtain the magnified view of small objects.
36.Odometer An instrument by which the distance covered by wheeled vehicles is measured.
37.Periscope It is used to view objects above sea level (used in submarines)
38.Phonograph An instrument for producing sound.
39.Photometer The instrument compares the luminous intensity of the source of light
40.Potentiometer It is used for comparing electromotive force of cells.
41.Pyrometer It measures very high temperature.
42.Quartz Clock A highly accurate clock used in astronomical observations and other precision work
43.Radar Radio, angle, detection, and range is used to detect the direction and range of an approaching airplane by means of radio microwaves
44.Radiometer It measures the emission of radiant energy.
45.Rain Gauge An apparatus for recording rainfall at a particular place.
46.Rectifier An instrument used for the conversion of AC into DC.
47.Refractometer It measures refractive index.
48.Saccharimeter It measures the amount of sugar in the solution.
49.Salinometer It determines the salinity of solution.
50.Seismograph It measures the intensity of earthquake shocks.
51.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.