Instruments and units they measure

Date: March 05, 2016

Lactometer Endoscope Photometer Phonograph Microscope

• Rain Gauge: An apparatus for recording rainfall at a particular place.

• Radiometer: It measures the emission of radiant energy.

• Refractometer: It measures• refractive index.

• Cyclotron: A charged particle accelerator which can accelerate charged particles to high energies.

• Dynamo: It converts mechanical energy into electrical energy.

• Dynamometer: It measures electric power

• Electrometer: It measure electricity

• Hygrometer: It measures humidity in air.


• Hydrophone: It measures sound under water.

• Electroscope: It detects presence of an electric charge.

• Galvanometer: It measures the electric current of low magnitude.


• Hydrometer: It measures the specific gravity of liquids.

• Potentiometer: It is used for comparing electromotive force of cells.

• Pyrometer: It measures very high temperature.

• Cinematography: It is an instrument used in cinema making to throw on screen and enlarged image of photograph.

• Crescograph: It measures the growth in plants.

• Kymograph: It graphically records physiological movements (Blood pressure and heart beat).

• Lactometer: It determines the purity of milk.


• Manometer: It measures the pressure of gases.

• Mariner’s compass: It is an instrument used by the sailors to determine the direction.

• Microphone: It converts the sound waves into electrical vibrations and to magnify the sound.

• Microscope: It is used to obtain magnified view of small objects.

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

• Phonograph: An instrument for producing sound.

• Radar: It is used for detecting the direction and range of an approaching plane by means of radio microwaves.

• Saccharimeter: It measures the amount of sugar in the solution.

• Photometer: The instrument compares the luminous intensity of the source of light

• Periscope: It is used to view objects above sea level (used in sub-marines).

• Endoscope: It examines internal parts of the body.