INSTRUMENTS
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● Accelerometer :- An instrument for measuring acceleration, especially of an aircraft or a rocket
● Actinometer :- Instrument (based on fluorescence) for measuring the intensity of electromagnetic radiation
● Aerometer :- Instrument for measuring the weight or density of air and gases.
● Altazimuth :- Instrument for measuring the altitude and azimuth of celestial bodies
● Altimeter :- Aneroid barometer calibrated for measuring altitude
● Ammeter :- Instrument for measuring electric current
● Anemometer :- Instrument for measuring the speed of wind
● Atmometer :- Instrument for measuring the rate of evaporation of water, also called evaporometer
● Audiometer :- Instrument for measuring the level of human hearing
● Barograph :- Instrument used by meteorologists for recording on paper the variations in atmospheric pressure with time
● Beckmann thermometer :- Sensitive thermometer for measuring small changes in temperature as small as 0.01 degree
● Bolometer :- Sensitive instrument for measuring heat radiations
● Calipers Instrument :- It is measuring distances such as the internal and external diameters of tubes, cylinders, etc.
● Cathetometer Instrument :- consisting of a telescope which can slide along a graduated vertical pillar, used for measuring lengths at a distance of a few feet
● Coelostat :- Device used with an astronomical telescope to follow the path of celestial bodies
● Colourtron :- It is a Type of cathode-ray tube used in colour TV sets having three electron guns, one for each primary colour.
● Cryometer :- It is Thermometer for measuring low temperatures.
● Cryophorus :- Apparatus used for demonstrating the cooling effect of evaporation
● Cryostat :- Apparatus in which a low temperature can be maintained
● Dasymeter Instrument :- It is determining the density of a gas
● Densitometer Instrument :- It is used for measuring the density of an image on a photographic plate
● Dilatometer :- Apparatus for measuring changes in volume of substances
● Dynamo :- Device for converting mechanical energy into electrical energy
● Dynamometer :- Instrument for the measurement of power
● Electrodynamometer :- Instrument for measuring current. voltage, or power, in both de and ac circuits
● Electroscope :- Instrument used for detecting the presence of an electric charge
● Endoscope :- Instrument used by doctors for examining various internal parts of the body
● Epidiascope :- Device for projecting images of opaque or transparent objects
● Exposure meter :- Device used in photography to assess the amount of light, so that the shutter speed and aperture may be correctly adjusted for a given film
● Fathometer :- Device for measuring the depth of the sea using echos
● Foucault's Pendulum :- Pendulum used for demonstrating the earth's rotation
● Galvanometer :- Instrument for detecting small electric currents: can be converted to measure current and voltage
● Geiger-Muller counter :- Instrument for the detection of radioactive radiations, also known as Geiger counter.
● Goniometer :- Instrument for measuring angles, especially between crystal faces
● Governor :- Instrument for regulating the speed of an engine
● Hydrometer :- Instrument for measuring the density of relative density of liquids
● Hygrometer :- Instrument to determine the relative humidity of the atmosphere.
● Hypsometer :- Apparatus for determining the boiling point of liquids, can be used for the determination of altitude above sea-level
● Inclinometer :- Device for measuring the angle of inclination of an aircraft with the horizontal
● Katharometer :- Device for measuring thermal conductivity
● Loudspeaker :- Device for converting electric current into loud sounds
● Magnetometer :- Instrument for comparing strengths of magnetic fields
● Manometer :- An instrument for measuring the pressure of a gas
● Mass spectrograph :- Apparatus for determining the masses of individual atoms
● Microphone :- Device for converting sound energy into electrical energy which may again be converted into sound after transmission there are condenser microphones.
● Nephelometer :- Instrument for measuring the scattering of light by particles suspended in a liquid
● Nephoscope :- Instrument for determining the speed of celestial bodies (even clouds)
● Ohmmeter :- Instrument for measuring electrical resistance in ohms
● Oscilloscope :- Instrument based upon a cathode ray tube which displays on its screen one or more rapidly electrical quantities
● Photoelectric cell :- Device for the detection and measurement of light and other electromagnetic radiations
● Photometer :- Device for comparing the intensity of sources of light
● Planimeter :- Instrument for measuring areas
● Pyrometer :- Instrument for measuring high temperatures
● Rectifier :- Device for converting ac into dc
● Refractometer :- Apparatus for measuring the refractive index of a substance
● Saccharimeter :- Apparatus for determining the concentration of a sugar solution by determining optical activity.
● Saccharometer :- Type of hydrometer for measuring the concentration of a sugar solution by determining its density
● Salinometer :- Type of hydrometer for measuring the concentration of a salt solution by determining its density
● Seismograph :- Instrument for detecting and recording the intensity of earthquakes
● Sensitometer :- Instrument used for measuring the sensitivity of a photographic film
● Sextant :- Instrument for measuring angular distance, it can be used for determining the height of buildings, angular elevation and angular diameter of the sun.
● Spherometer :- Instrument for measuring small thicknesses and curvature of spherical surfaces
● Sphygmomanometer :- Instrument used for measuring blood pressure
● Stroboscope :- Device which emits flashes of light of adjustable frequency.
● Tachometer :- Instrument which measures the speed of a machine by measuring the rate of revolution of a revolving shaft
● Tensimeter :- Instrument for measuring vapour pressure
● Thermocouple :- Instrument used for measuring temperature
● Thermopile :- Instrument for detecting and measuring heat radiations
● Thermostat :- Device for maintaining constant temperature
● Transformer :- Device for stepping up or stepping down ac voltage
● Vacuum pump :- Device to produce low pressures
● Venturimeter :- Device for measuring the rate of flow of fluids (liquids and gases)
● Vernier :- Device for measuring subdivisions of a scale
● Viscometer :- Instrument for measuring viscosity of fluids
● Voltmeter :- Instrument for measuring voltage or potential difference between two points
● Wattmeter :- Instrument for measuring the power of an electrical circuit.
● Wavemeter :- Instrument for measuring the wavelength of a radiowave.
Also Read :- Heat Treatment , Polymeric Materials , Thermodynamics , Static Electricity , Transmission of Heat.