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No.

Name of instrument

Use

01 Altimeter Measures altitudes (used in aircraft)
02

Ammeter

Measures strength of electric current
03

Anemometer

Measures force and velocity of wind and determines its directions
04 Audiometer Measures intensity of sound
05 Barograph Continuous recording of atmospheric pressure
06 Barometer Measures atmospheric pressure
07 Binoculars To view distant objects
08 Bolometer To measure heat radiation
09 Callipers Measure inner and outer diameters of bodies
10 Calorimeter Measures quantities of heat
11 Cardiogram (ECG) Traces movements of the heart; recorded on a Cardiograph
12 Cathetometer Determines heights, measurement of levels, etc., in scientific experiments
13 Chronometer Determines longitude of vessel at sea
14 Colorimeter Compares intensity of colours
15 Commutator To change/reverse the direction of electric cuttent; Also used to convert AC into DC
16 Cryometer A type of thermometer used to measure very low-tempratures, usually close to 0 0 C
17 Cyclotron A charged particle accelerator which can accelerate charged particles to high energies
18 Dilatometer Measures changes in volume of substances
19 Dynamo To convert mechanical energy into electrical energy
20 Dynamometer Measures electrical power
21 Electroencephalogram (EEC) Records and interrupts the electrical waves of the brain recorded on electroencephalograms.
22 Electrometer Measures very call but potential difference in electric currents
23 Electroscope Detects presence of an electric charge
24 Electron microscope To obtain a magnifying view of very small objects. Capable of magnifying up to 20,000 times
25 Endo scope To examine internal parts of the body
26 Fathometer Measures depth of the ocean
27 Flux meter Measures magnetic flux
28 Galvanometer Measures electric current
29 Hydrometer Measures the relative density of liquids
30 Hygrometer Measures level of humidity
31 Hydrophone Measures sound under water
32 Hygroscope Shows the changes in atmospheric humidity
33 Hypsometer To determine boiling point of liquids
34 Kymograph Graphically records physiological movement
35 Lactometer Measures the relative density of milk to determine purity
36 Mach meter Determines the speed of an aircraft in terms of the speed of sound
37 Magnetometer Compares magnetic movements and fields
38 Manometer Measures the pressure of gases
39 Micrometer Converts sound waves into electrical vibrations
40 Microphone Measures distances / Angles
41 Microscope To otain a magnified view of small objects
42 Nephetometer Measures the scattering of light by particles suspended in a liquid
43 Ohmmeter To measure electrical resistances in ohms
44 Ondometer Measures the frequency of electromagnetic waves, especially in the radio-frequency band
45 Periscope To view objects above sea level ( used in submarines )
46 Photometer Compares the luminous intensity of the source of light
47 Polygraph Instrument that simultaneously records changes in physiological processes such as heartbeat, blood-pressure and respiration; used as a lie detector
48 Pyknometer Determines the density and coefficient of expansion of liquids
49 Pyrheliometer Measures components of solar radiation
50 Pyrometer Measures very high temperature
51 Quadrant Measures altitudes and angles in navigation and stronomy
52 Radar To detect the direction and range of an approaching aero- plane by means of radio waves, (Radio, Angle, Detection and Range)
53 Radio micrometer Measures heat radiation
54 Refractometer Measures refraction indices
55 Salinometer Determines salinity of solutions
56 Sextant Used by navigators to find the latitude of a place by measuring the elevation above the horizon of the sun or another star; also used to measure the height of very distant objects
57 Spectroscope To observe or record spectra
58 Spectrometer Spectroscope equipped with calibrated scale to measure the position of spectral lines Measurement of refractive indices
59 Spherometer Measures curvature of spherical objects
60 Sphygmomanometer Measures blood pressure
61 Stereoscope To view two-dimensional pictures
62 Stethoscope Used by doctors to hear and analyze heart and lung sounds
63 Stroboscope To view rapidly moving objects
64 Tachometer To determine speed, especially the rotational speed of a shaft (used in aero planes and motorboats)

Tacheometer A theodolite adapted to measure distances, elevations and bearings during survey
65 Tangent galvanometer Measures the strength of direct current
66 Telemeter Records physical happenings at a distant place
67 Teleprinter Receives an sends typed messages from one place to another
68 Telescope To view distant objects in space
69 Thermometer Temperature is measured by determining the electrical resistance of a coil of thin wire
70 Theodolite Measure horizontal and vertical angles
71 Thermostat Regulates the temperature to a particular point
72 Tonometer To measure the pitch of a sound
73 Transponder To receive a signal and transmit a reply immediately
74 Udometer Rain gauge
75 Ultrasonoscope To measure and use ultrasonic sound (beyond hearing); use to make a Ecogram to detect brain tumors, heart detects and abnormal growth
76 Venturimeter To measure the rate of flow of liquids
77 Vernier Measures small sun-division of scale
78 Viscometer Measures the viscosity of liquid
79 Voltmeter To measure electric potential deference between two points
80 Wattmeter To measure the power of an electric circuit
81 Wavemeter To measure the wavelength of a radiowave

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