Altimeter–An instrument used for measuring altitudes in aircraft.
Ammeter–An instrument for measuring electric currents in amperes.
Anemometer–An instrument for measuring the force and velocity of
wind.
Audiometer–An instrument for measuring the intensity of sound.
Audiophone–An instrument for improving imperfect sense of
hearing.
Barometer–An apparatus used for measuring the atmospheric
pressure.
Calorimeter–An instrument used for measuring quantities of heat.
Carburettor–An apparatus used in an internal combustion engine
for charging air with petrol vapour.
Cardiograph–A medical instrument for tracing heart movements.
Chronometer–An instrument kept on board ships for measuring
accurate time.
Crescograph–It is used for measuring growth in plants.
Dynamo–The origin of electricity in a dynamo is the
transformation of mechanical energy into electrical energy.
Galvanometer–An instrument for measuring electric currents of
small magnitude.
Hydrometer–An instrument used for measuring the specific gravity
of liquids.
Hydrophone–An instrument for recording sound under water.
Hygrometer–An instrument for measuring humidity in air.
Lactometer–An Instrument for measuring the relative density of
milk.
Manometer–An instrument for measuring the pressure of a gases.
Mariner's compass–An apparatus used by sailors to know the
direction. The needle always points north-south.
Microphone–An instrument used for converting sound waves into
electrical vibrations and to magnify the sound.
Microscope–An instrument used for magnifying minute objects by a
lens system.
Odometer–An instrument by which the distance covered by wheeled
vehicles is measured.
Phonograph–An instrument for reproducing sound.
Photometer–It is an instrument for measuring the intensity of
light; a device for comparing the luminous intensity of sources of light.
Polarimeter–An instrument used for measuring optical activity.
Pyrometer–An instrument for recording high temperatures from a
great distance.
Radar–It is an abbreviated form of Radio, Angle, Direction and
Range. It is used for detecting the direction and range of an approaching
plane by means of radio microwaves.
Rain Gauge–An apparatus for recording rainfall at a particular
place.
Radiometer–An instrument for measuring the emission of radiant
energy.
Refractometer–An instrument to measure refractive indexes.
Seismometer or Seismograph–An instrument for recording earthquake
shocks.
Sextant–An instrument used for measuring the altitude of the sun
and other heavenly bodies.
Spectrometer–An instrument for measuring the energy distribution
of a particular type of radiation.
Speedometer–An instrument which indicates the speed at which a
vehicle is moving.
Spherometer–An instrument for measuring curvature of surfaces.
