“The Knowledge Library”

Knowledge for All, without Barriers…

An Initiative by: Kausik Chakraborty.
20/03/2023 5:34 PM

“The Knowledge Library”

Knowledge for All, without Barriers……….
An Initiative by: Kausik Chakraborty.

The Knowledge Library

Measuring Instruments

Instrument Use
Bolometer Instrument for measuring radiation by means of the rise in temperature.
Hydrometer Instrument for measuring the density of liquids.
Hygrometer Instrument for measuring the humidity of the air or a gas
Lactometer Instrument for measuring the amount of water in milk
Anemometer Instrument for measuring wind force.
Salinometer Instrument for measuring the salinity of a solution
Altimeter Instrument for measuring the altitude of an aircraft etc.
Galvanometer Instrument for detecting and measuring electric currents


Telescope Optical instrument using lenses or mirrors to magnify distant objects.
Microscope Instrument with lenses for magnifying objects or details invisible to the naked eye.
Stethoscope Instrument used in listening to the heart, lungs, etc. [Greek stethos breast]
Kaleidoscope Tube containing mirrors and pieces of coloured glass etc. producing changing reflected patterns when shaken.
Endoscope Instrument used to examine the interior of a hollow organ or cavity of the body
Oscilloscope Device for viewing oscillations by a display on the screen of a cathode-ray tube.
Periscope Apparatus with a tube and mirrors, by which an observer in a trench, submerged submarine, or at the back of a crowd etc., can see things otherwise out of sight


Crescograph Instrument for measuring growth in plants
Seismograph Instrument that records the force, direction, etc., of earthquakes.
Cardiograph Instrument recording heart movements.
Heliograph Signalling apparatus reflecting sunlight in flashes.
Radiograph Instrument recording the intensity of radiation

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