Altimeter is a special type of aneroid barometer, used in measuring altitudes.
Ammeter is an instrument to measure the strength of an electric current.
Amplifier is an electronic device that increases the strength of a signal fed into it.
Anemometer is an instrument to measure the velocity and find the direction of the wind.
Audiometer is an instrument to measure difference in hearing
Barometer is used to measure atmospheric pressure
Binocular is an optical instrument designed for magnified view of distant objects by both eyes simultaneously.
Calorimeter is an instrument for measuring quantities of heat.
Chronometer is a clock to determine longitude of a vessel at sea.
Clinical Thermometer is a thermometer for measuring the temperature of human body.
Colorimeter is an instrument for comparing intensities of colour.
Commutator is an instrument to change or reverse the direction of an electric current. In dynamo, it is used to convert the alternating current into direct current.
Computer is an electronic device which solve our complex problem through the arithmetical and logical expression.
Crescograph is an instrument for measuring the growth of plants. This was invented by an Indian, Mr. Jagadish Chandra Bose, a renowned botanist.
Cyclotron is an apparatus for electromagnetic acceleration of charged atoms. It has made possible to make ordinary elements radioactive, leading to production of radioactive isotopes.
Dictaphone is a machine which first records what is spoken into it and then reproduces it in type.
Disk is most commonly used means of storing programs and data on a computer.
Dynamo is a device for converting mechanical energy into electrical energy.
Dynamometer is an instrument for measuring the electrical power.
Electrocardiograph (ECG) is an instrumentused for detection of electric impulses of the heart. It gives a graphic picture of heart beats.
Electroencephalograph (EEG) is an instrument used for recording change in electric potential in various areas of the brain by means of electrodes on the scalp or in the brain itself.
Electrometer is an instrument tor measuring electricity.
Electrophorus is an instrument for generating statical electricity by induction.
Electroscope is an instrument for detecting the presence of electric charge.
Eudiometer is a glass tube for measuring volume changes in chemical reactions between gases.
Galvanometer is an instrument for measuring electric current.
Gyroscope is a rapidly rotating heavy wheel that keeps the stability of its axis. It was invented in 1852 to demonstrate the rotation of earth. These days it is used as ship stabilizer.
Hydrometer is an instrument for measuring the relative density of liquids.
Hydrophone is an instrument for measuring sound under water.
Hydroscope is an optical instrument used for seeing objects below the surface of water.
Hygrometer is an instrument for measuring the relative humidity of the atmosphere.
Hygroscope is an instrument to show the changes in atmospheric humidity.
Hypsometer is an instrument to measure the height above sea level. It is an apparatus for octet mining the boiling point of liquid. Since the boiling points of liquids have a direct relationship with atmospheric pressure and atmospheric pressure with altitude, therefore the instrument may be used for the determination of altitude above the sea level. This instrument is generally used by the mountaineers.
Inclinometer is an instrument which used to measure the angle of inclination that an aircraft makes with the horizontal.
Incubator is a box designed to maintain a constant internal temperature used for rearing chickens and prematurely born infants.
Kymograph is an instrument for recording variations in pressure, for example, for sound waves.
Lactometer is an instrument for measuring the relative density of milk.
Magnetometer is an instrument used to compare the magnetic moments and fields.
Manometer is an instrument to measure the pressure of gases.
Mariner’s Compass is an apparatus for determining direction, graduated to indicate 33 directions. The "N" point on the dial indicates north pole and the "S" point, south pole.
Megaphone is an instrument for carrying sound to long distances.
Micrometer is an instrument used for accurately measuring small distances or angles.
Microphone is an instrument used for converting sound waves into electrical energy which is transmitted through wires and then recovered into sound in a magnified intensity.
Microscope is an instrument for magnified view of very small objects.
Periscope is an apparatus for viewing objects lying above the eye level of the observer and whose direct vision is obstructed. It consists of a tube bent twice at right angles and having plane mirrors at these bends inclined at angles of 45° to the tube.
Photometer is an instrument for comparing the luminous intensity of the sources of light.
Planimeter is a mechanical integrating instrument to measure area of a plane surface.
Pyknometer is an instrument used to measure the density and co-efficient of expansion of liquid.
Pyrheliometer is an instrument for measuring solar radiations.
Pyrometers are thermometers to measure high temperatures.
Quadrant is an instrument for measuring altitudes and angles, in navigation and astronomy.
Quartz clock is a highly accurate clock used in astronomical observations and other precision work.
Radar (acronym of radio detection and ranging) is used for detecting and finding the range of moving objects by transmitting beams of radio waves.
Radio Micrometer is an instrument for measuring heat radiations.
Rain Gauge is an instrument for measuring rainfall
Rectifier is a device that passes current only in the forward direction and can be used as AC to DC convertor.
Refractometer is an instrument used to measure the retractive index of a substance.
Repeater is a device that receives signals in one circuit and automatically delivers corresponding signals to one or more circuits.
Resistance Thermometer is used for determining the electrical resistance of conductor.
Salinometer is a type of hydrometer used to determine the concentration of salt solutions by measuring their densities.
Seismograph or Seismometer is an instrument used for recording the intensity and origin of earthquake shocks.
Sextant is an instrument used for measuring angular distances between two objects.
Spectrometer is a type of spectroscope so calibrated as to make it suitable for the precise measurement of refractive indices.
Spectroscope is an instrument used for spectrum analysis.
Spherometer is an instrument used for accurately measuring the curvature of spherical objects.
Sphygmomanometer is an apparatus for measuring blood pressure.
Spring Balance is used to measure the mass of a body. It is preferred only when quick but approximate determinations are to be carried out.
Stereoscope is an optical device to see two dimensional pictures as having depth and solidity.
Stethoscope is an instrument for hearing and analysing the sound of heart and lungs.
Stroboscope is an instrument used for viewing the objects moving rapidly with a periodic motion and to see them as if they were at rest.
Tangent Galvanometer is an instrument for measuring the strength of direct current.
Tape Recorder is an apparatus which records and reproduces sound by using magnetic tapes.
Telemeter is an apparatus for recording physical events happening at a distance.
Telephone is an apparatus used for transmission of sound.
Teleprinter is a medium for sending, receiving and printing of telegraphic messages.
Telescope is an instrument for viewing distant objects as magnified.
Television is an instrument used for transmitting the visible moving images by means of wireless waves.
Telstar is an instrument used for transmitting wireless and television broadcasts across continents via space.
Thermometer is an instrument to measure the temperature.
Thermoscope is a device that shows changes in temperature. A typical design is a tube in which a liquid rises and falls as the temperature changes.
Thermostat is an automatic device for regulating constant temperatures.
Transistor is a small device which may be used to amplify currents and perform other functions usually performed by a thermionic valve.
Vernier is an adjustable scale with marking of 10 sub-divisions of one-tenth of an inch or any other suitable markings for measuring small sub-divisions of scale.
Viscometer is an instrument used to measure the viscosity of a fluid.
Voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit
Wattmeters an instrument for measuring the electric power in watts of any given circuit.
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