Lists of Measuring Instruments For SSC & Railway

Lists of Important Measuring Instruments

Name of the Instrument	Used For
Altimeter	Measures altitudes (used in aircraft)
Calorimeter	Measures quantities of heat.
Dilatometer	Measures changes in volume of substances
Hygroscope	Shows the changes in atmospheric humidity
Magnetometer	Compares magnetic movements and fields
Electromicroscope	To obtain a magnifying view of very small objects Capable of magnifying up to 20,000 times
Audiometer	Measure intensity of sound
Callipers	Measure inner and outer diameters of bodies
Microphone	Measure distances/angles
Techeometer	A theodolite adapted to measure distance, elevations and bearings during survey
Stereoscope	To view two-dimensional picture
Spectroscope	To observe or  record spectra
Radio micrometer	Measures heat radiation
Sextant	Used by navigators to find the latitude of a place by measuring the elevation above the horizon of the sun or another star; also used to measure the height of very distant objects
Wattmeter	To measure the power of an electric circuit
Venturimeter	To measure the rate of flow of liquids
Pyknometer	Determines the density and coefficient of expansion of liquids
Ammeter	Measures strength of electric current
Bolometer	To measure heat radiation
Lactometer	Measures the relative density of milk to determine purity
Hygrometer	Measures level of humidity
Fathometer	Measures depth of the ocean
Dynamometer	Measures electrical powr
Cryometer	Atype of thermometer used to measure very low temperatures, usually close to 0oC
Spherometer	Measures curvature of spherical objects
Techometer	To determine speed, especially the rotational speed of a shaft (used in aeroplanes and motor-boats)
Wavemeter	To measure the wavelength of a radiowave
Thermometer	Measures Temperature
Ultrasonoscope	To measure and use ultrasonic sound (beyond hearing), use to make a Ecogram to detects and abnormal growth
Voltmeter	To measure electric potential difference between two points
Radar	To detect the direction and range of an approaching aeroplane by means of radiowaves, (Radio, Angle, Detection and Range
Viscometer	Measures the viscosity of liquid
Pyrometer	Measures very high temperature
Quadrant	Measures altitudes and angles in navigation and astronomy
Salinometer	Determines salinity of solutions
Thermostat	Regulates temperature at a particular point
Udometer	Rain gouge
Vernier	Measures small sub-division of scale
Spectrometer	Spectroscope equipped with calibrated scale to measure the position of spectral lines (Measurement of refractive indices)
Ondometer	Measures the frequency of electromagnetic waves, especially in the radio-frequency band
Polygraph	Instrument that simultaneously records changes in physiological processes such as heartbeat, blood-pressure and respiration; used as a lie detector
Telemeter	Records physical happenings at a distant place.
Telescope	To view distant objects in space
Transponder	To recives a signal and transmit a reply immediately
Periscope	To view objects obove sea level (used in submarines)
Refractometer	Measures refractive indices
Stroboscope	To view rapidly moving objects
Electroscope	Detects presence of an electric charge
Endoscope	To examine internal parts of the body
Fluxmeter	Measures magnetic flux
Galvanometer	Measures electric current
Anemometer	Measures force and velocity of wind and directions
Binoculars	To view distant objects
Kymograph	Graphically records physiological movement. (e.g. blood pressure/heartbeat)
Machmeter	Determines the speed of an aircraft in terms of the speed of sound
Micrometer	Converts sound waves into electrical vibrations
Electrometer	Measures very small but potential difference in electric currents
Sphygmometer	Measures bold pressure
Tangent Galvanometer	Measures the strength of direct current
Teleprinter	Receives and sends typed messages from one place to another
Tonometer	To measure the pitch of a sound
Stethoscope	Used by doctors to hear and analyze heart and lung sounds
Ohmmeter	To measure electrical resistance in ohms
Microscope	To obtain a magnified view of small objects
Nephetometer	Measures the scattering of light by particles suspended in a liquid
Photometer	Compares the luminous intensity of the source of light
Cardiogram (ECG)	Traces movements of the heart, recorded on a Cardiograph
Chronometer	Determines longitude of a vessel at sea.
Cyclotron	A charged particle accelerator which can accelerate charged particles to high energies.
Dyanamo	To convert mechanical energy into electrical energy
Electronecephalograph (EEC)	Records and interprets the electrical waves of the brain (brain waves) recorded on electroence-phalograms
Colorimeter	Compares intensity of colours
Manometer	Measures the pressure of gases
Barograph	Continuous recording of atmospheric pressure
Commutator	To change/reverse the direction of electric current, Also used to convert AC into DC.
Pyrheliometer	Measures components of solar radiation
Tangent	Measures the strength of direct current
Hydrometer	Measures the relative density of liquids
Barometer	Measures atmospheric pressure
Hydrophone	Measures sound under water
Cathetometer	Determines heights, measurement of levels, etc, in scientific experiments
Hypsometer	To determine boiling point of liquids