Altimeter is a special type of
aneroid barometer, used in measuring altitudes.
Ammeter is an instrument to measure the strength of an electric
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 for measuring 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 of
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Clinical Thermometer is a thermometer for measuring the
temperature of human body.
Calorimeter is an instrument for comparing intensities of
Commutator is an instrument to change of reverse the direction
of an electric current. In dynamo used to convert the alternating current into
Computer is a technical device designed to find instantaneous
solutions of huge and complex calculation based on the information already fed.
Dynamo is a device for converting mechanical energy into
Electroscope is an instrument for detecting the presence of
Galvanometer is an instrument for measuring electric current.
Hydrometer is an instrument for measuring the relative density
Hydrophone is an instrument for measuring sound under water.
Hygrometer is an instrument for measuring the relative humidity
of the atmosphere.
Hygroscope is an instrument to show the changes in atmospheric
Lactometer is an instrument for measuring the relative density
Micrometer is an instrument used for accurately measuring small
distances or angles.
Manometer is instrument to measure the pressure of gases.
Magnetometer is an instrument used to compare the magnetic
moments and fields,
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.
Microscope is an instrument for magnified view of very small
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.
Radio micrometer is an instrument for measuring heat
Rain gauge is an instrument for measuring rainfall.
Refractometer is an instrument used to measure the refractive
index of a substance.
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 is an instrument used for recording the intensity
and origin of earthquake shocks.
Sextant is an instrument used for measurement of angular
distances between two objects.
Spectroscope is an instrument used for spectrum analysis.
Spectrometer is a type of spectroscope so calibrated as to make
it suitable for the precise measurement of refractive indices.
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 a medical instrument for hearing and analyzing
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.
Telemeter is an apparatus for recording physical events
happening at a distance.
Teleprinter is a communication medium for automatic sending,
receiving and printing of telegraphic message from distant places.
Telescope is an instrument for viewing distant objects as
Television is an instrument used for transmitting the visible
moving images by means of wireless waves.
Thermometer is an instrument to measure the temperature.
Thermoscope is used for measuring the temperature change
(approximately) of the substances by nothing the corresponding change in volume.
Thermostat is an automatic device for regulating constant
Transistor is a small device which may be used to amplify
currents and perform other functions usually performed by a thermionic value.
Vernier is an adjustable scale with marking of 10 sub-divisions
of one-tenth of an inch or any other suitable marking for measuring small
sub-divisions of scale.
Viscometer is an instrument for measuring the viscosity, i.e.
the property of resistance of a fluid to relative motion within itself.
Voltmeter is an instrument to measure potential difference
between two points.