Seismometer:- An instrument used for recording earth quake shocks.

Pyrometer :- An instrument for recording high temperatures from a great distance.

Anemometer :- An Instrument for measuring the force and velocity of wind.

Odometer:- An instrument by which the distance covered by wheeled vehicles is measured.

Tachometer:- An instrument for determining speeds of aeroplanes and motor-boats.

Audiometer :- An instrument for measuring the intensity of sound.

Galvanometer:- An instrument that measures electric current.

Hydrophone:- An instrument that measures the sound under water.

Calorimeter :- An instrument used for measuring quantities of heat.

Sextant :- An instrument used for measuring the attitude of the sun and other heavenly bodies.

Manometer :- An instrument for determining the pressure of a gas.

Barometer :- An apparatus used for measuring the atmospheric pressure.

Phonograph :-  An instrument for reproducing sound.

Thermostat :- An instrument used to regulate temperature to a particular degree.

Chronometer:- An instrument kept on board ships for measuring accurate time.

Altimeter :- An instrument used for measuring altitudes in aircraft.

Teleprinter:- An instrument which prints automatically messages sent from one place to another on telegraph lines.

Sphygmomanometer :- An instrument that measures blood pressure

Dynamometer :- An instrument that measures electrical power

Tonometer :- An instrument that measures the pitch of sound

Wavemeter :- It is an instrument that  measures the wavelength of a radio wave.

Periscope :- It is an instrument that is used in submarines to view objects above sea level.

Altimeter:- It is an instrument used in aircraft to measure altitude.

Cinematography :- Cinematography contains a series of lenses arranged to throw on screen an enlarged image of photograph.

Audiophone :- It is an instrument for improving imperfect sense of hearing.

Radiometer :- It is an instrument for measuring the emission of radiant energy.

Wattmeter :- An instrument that measures the power of an electric circuit.

Stroboscope :- This is an instrument to view rapidly moving objects.

Microphone :- It is an instrument that converts sound waves into electrical vibrations.

Radar - Radar is the instrument that detects the direction and range of an approaching aeroplane by means of radio waves.