Altimeter:
A special type of aneroid barometer, used in measuring altitudes.
Ammeter:
An instrument to measure the strength of an electric current.
Anemometer:
An instrument to measure the velocity and find the direction of the wind.
Audiometer:
An instrument to measure difference in hearing.
Barometer:
used for measuring atmospheric pressure.
Binocular:
An optical instrument designed for magnified view of distant objects by both eyes simultaneously.
Calorimeter:
An instrument for measuring quantities of heat.
Chronometer:
A clock to determine longitude of a vessel of sea.
Clinical Thermometer:
A thermometer for measuring the temperature of human body.
Calorimeter:
An instrument for comparing intensities of colour.
Commutator:
An instrument to change of reverse the direction of an electric current. In dynamo used to convert the alternating current into direct current.
Computer:
A technical device designed to find instantaneous solutions of huge and complex calculation based on the information already fed.
Dynamo:
A device for converting mechanical energy into electrical energy.
Electroscope:
An instrument for detecting the presence of electric charge.
Galvanometer:
An instrument for measuring electric current.
Hydrometer:
An instrument for measuring the relative density of liquids.
Hydrophone:
An instrument for measuring sound under water.
Hygrometer:
An instrument for measuring the relative humidity of the atmosphere.
Hygroscope:
An instrument to show the changes in atmospheric humidity.
Lactometer:
An instrument for measuring the relative density of milk.
Micrometer:
An instrument used for accurately measuring small distances or angles.
Manometer:
An instrument to measure the pressure of gases.
Magnetometer:
An instrument used to compare the magnetic moments and fields,
Mariner's Compass:
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:
An instrument for magnified view of very small objects.
Periscope:
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:
An instrument for comparing the luminous intensity of the sources of light.
Planimeter:
A mechanical integrating instrument to measure area of a plane surface.
Pyknometer:
An instrument used to measure the density and co-efficient of expansion of liquid.
Pyrheliometer:
An instrument for measuring solar radiations.
Pyrometers:
Are thermometers to measure high temperatures.
Quadrant:
An instrument for measuring altitudes and angles in navigation and astronomy.
Quartz clock:
A highly accurate clock used in astronomical observations and other precision work.
Radio micrometer:
An instrument for measuring heat radiations.
Rain gauge:
An instrument for measuring rainfall.
Refractometer:
An instrument used to measure the refractive index of a substance.
Resistance thermometer:
used for determining the electrical resistance of conductor.
Salinometer:
A type of hydrometer used to determine the concentration of salt solutions by measuring their densities.
Seismograph:
An instrument used for recording the intensity and origin of earthquake shocks.
Sextant:
An instrument used for measurement of angular distances between two objects.
Spectroscope:
An instrument used for spectrum analysis.
Spectrometer:
A type of spectroscope so calibrated as to make it suitable for the precise measurement of refractive
indices.
Spherometer:
An instrument used for accurately measuring the curvature of spherical objects.
Sphygmomanometer:
An apparatus for measuring blood pressure.
Spring balance:
used to measure the mass of a body. It is preferred only when quick but approximate determinations are to be carried out.
Stereoscope:
An optical device to see two dimensional pictures as having depth and solidity.
Stethoscope:
A medical instrument for hearing and analyzing the sound of heart and lungs.
Stroboscope:
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:
An instrument for measuring the strength of direct current.
Telemeter:
An apparatus for recording physical events happening at a distance.
Teleprinter:
A communication medium for automatic sending, receiving and printing of telegraphic message from distant places.
Telescope:
An instrument for viewing distant objects as magnified.
Television:
An instrument used for transmitting the visible moving images by means of wireless waves.
Thermometer:
An instrument to measure the temperature.
Thermoscope:
used for measuring the temperature change (approximately) of the substances by nothing the corresponding change in volume.
Thermostat:
An automatic device for regulating constant tempera-tures.
Transistor:
A small device which may be used to amplify currents and perform other functions usually performed by a thermionic value.
Vernier:
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:
An instrument for measuring the viscosity, i.e. the property of resistance of a fluid to relative motion within itself.
Voltmeter:
An instrument to measure potential difference between two points.
