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Instrument to measure electric current
A galvanometer is an electromechanical measuring instrument for electric current. Early galvanometers were uncalibrated, but improved versions, called
Galvanometer
Type of ammeter
A mirror galvanometer is an ammeter that indicates it has sensed an electric current by deflecting a light beam with a mirror. The beam of light projected
Mirror_galvanometer
Scientology device
completed. Outside Scientology, the device is regarded as a type of skin galvanometer that measures variations in skin resistance. It is not considered a scientific
E-meter
A vibration galvanometer is a type of mirror galvanometer, usually with a coil suspended in the gap of a magnet or with a permanent magnet suspended in
Vibration_galvanometer
The thermo-galvanometer is an instrument for measuring small electric currents. It was invented by William Duddell about 1900. The following is a description
Thermo_galvanometer
Device for measuring small electrical currents
A string galvanometer is a sensitive fast-responding measuring instrument that uses a single fine filament of wire suspended in a strong magnetic field
String_galvanometer
Examination of the heart's electrical activity
the electrocardiograph's development. Willem Einthoven's 1903 string galvanometer enabled precise measurement of these signals, revolutionizing cardiography
Electrocardiography
Electromechanical recording device
high-speed recorder used beams of ultraviolet light reflected off mirror galvanometers, directed at light-sensitive paper. The earliest instruments derived
Chart_recorder
Voltmeter
of the galvanometer is observed, and the sliding tap adjusted until the galvanometer no longer deflects from zero. At that point the galvanometer draws
Potentiometer (measuring instrument)
Potentiometer_(measuring_instrument)
Instrument used for measuring voltage
scale in proportion to the voltage measured and can be built from a galvanometer and series resistor. Meters using amplifiers can measure tiny voltages
Voltmeter
A ballistic galvanometer is a type of sensitive galvanometer; commonly a mirror galvanometer. Unlike a current-measuring galvanometer, the moving part
Ballistic_galvanometer
Device used to inscribe telegrams
The syphon recorder replaced Thomson’s previous invention, the mirror galvanometer as the standard receiving instrument for submarine telegraph cables,
Syphon_recorder
Former undersea telegraph cable
required. While waiting for the next voyage, he developed his mirror galvanometer, an extremely sensitive instrument, much better than any until then.
Transatlantic_telegraph_cable
Instrument for detecting voltage
galvanoscope, frog galvanometer, rheoscopic frog, and frog electroscope. The device is properly called a galvanoscope rather than galvanometer since the latter
Frog_galvanoscope
Italian physicist (1784–1835)
In 1825 he developed the astatic galvanometer. Nobili's Galvanometer Schematics of Nobili's Galvanometer Galvanometer on display at MHS Geneva He worked
Leopoldo_Nobili
Device which creates images with lasers
professional use. It consists of a housing that contains lasers, mirrors, galvanometer scanners, and other optical components. A laser projector may contain
Laser_projector
System to measure electrical resistance
adjusted until the bridge is "balanced" and no current flows through the galvanometer Vg. At this point, the potential difference between the two midpoints
Wheatstone_bridge
French physician and physicist (1851-1940)
French physician, physicist and inventor of the moving-coil d'Arsonval galvanometer and the thermocouple ammeter. D'Arsonval was an important contributor
Jacques-Arsène_d'Arsonval
Concept in electrocardiography
hands and feet in pails of salt water, as the contacts for his string galvanometer, the first practical ECG machine. Lead I — This axis goes from shoulder
Einthoven's_triangle
oscilloscope reaches back to the first recordings of waveforms with a galvanometer coupled to a mechanical drawing system in the second decade of the 19th
History_of_the_oscilloscope
Tool for measuring electrical resistance
of meter movement known as a 'ratiometer'. These were similar to the galvanometer type movement encountered in later instruments, but instead of hairsprings
Ohmmeter
1979 Indian film
for suit, car and flat, claiming all as his own. He wants to start a galvanometer business by buying old ones and refurbishing them to workable ones with
Manzil_(1979_film)
Dutch physiologist (1860–1927)
Beginning in 1901, Einthoven completed a series of prototypes of a string galvanometer. This device used a very thin filament of conductive wire passing between
Willem_Einthoven
Controlled deflection of laser beams
scanner or so-called resonant galvanometer scanners - or to a freely addressable motion, as in servo-controlled galvanometer scanners. One also uses the
Laser_scanning
Production of voltage by a varying magnetic field
some electrical effect on the opposite side. He plugged one wire into a galvanometer, and watched it as he connected the other wire to a battery. He saw a
Electromagnetic_induction
German chemist and physicist (1779–1857)
on to the university of Halle. In 1820 he built the first sensitive galvanometer, naming it after Luigi Galvani. He created this instrument, acceptable
Johann_Schweigger
Device for measuring a physical quantity
see: Orders of magnitude (charge) Ammeter Clamp meter d'Arsonval galvanometer Galvanometer Oscilloscope allows quantifying time-dependent voltages Voltmeter
List_of_measuring_instruments
German physicist (1796–1877)
for 52 years, until 1876. In 1826, Poggendorff developed the mirror galvanometer, a device for detecting electric currents. He was noted for his extensive
Johann_Christian_Poggendorff
British cinema pioneer
France. His first notably successful scientific device was his Unipivot galvanometer. In 1999, the British film industry erected a commemorative plaque on
Robert_W._Paul
Electronic measuring instrument that combines several measurement functions in one unit
from 1907. The first moving-pointer current-detecting device was the galvanometer in 1890. These were used to measure resistance and voltage by using a
Multimeter
Property of space that quantifies the magnetic influence at a given location
generators, transformers, relays, lifting electromagnets, SQUIDs, galvanometers, and magnetic recording heads. The relation between the magnetic properties
Magnetic_field
Instrument to measure minute voltage
imbalance rather than to measure an absolute quantity. Galvanometers as null detectors: Early galvanometers, were commonly used as indicators of current or imbalance
Null_detector
Application of experimental method to psychological research
have a lens so an appropriate speed for the film can be reached. The galvanometer is an early instrument used to measure the strength of an electric current
Experimental_psychology
British physicist, engineer and mathematician (1824–1907)
3.5 seconds. He patented the key elements of his system, the mirror galvanometer and the siphon recorder, in 1858. Whitehouse still felt able to ignore
Lord_Kelvin
American writer and Scientology founder (1911–1986)
Frederick; Jung, C. G. (July 1907). "Psycho-physical Investigations with the Galvanometer and Pneumograph in Normal and Insane Individuals". Brain. 30 (2). Oxford
L._Ron_Hubbard
Type of electrical circuit
a battery, and a galvanometer is connected across the other two vertices. The variable resistor is adjusted until the galvanometer reads zero. It is
Bridge_circuit
Kind of show made with laser light
which correlates to the amount of voltage applied to the galvanometer scanner. Two galvanometer scanners can enable X-Y control voltages to aim the beam
Laser_lighting_display
Physicist, biologist and botanist (1857–1937)
receiver (left) used a galena crystal detector inside a horn antenna and galvanometer to detect microwaves. Bose invented the crystal radio detector, waveguide
Jagadish_Chandra_Bose
Aspect of photography history
coupled shutter speed dial and/or the coupled aperture ring to center a galvanometer-based meter needle shown in the viewfinder. The disadvantage of this
History of the single-lens reflex camera
History_of_the_single-lens_reflex_camera
French engineer and inventor (1851–1921)
Jules Carpentier was one of the first manufacturers of various models of Galvanometer that had been designed by Marcel Deprez and Arsène d'Arsonval. In addition
Jules_Carpentier
Irish physicist (1903–1995)
Cambridge Trinity College Dublin Thesis The production of fast particles ; Galvanometer and oscillograph design (1931) Doctoral advisor Ernest Rutherford Signature
Ernest_Walton
Force needed to pull a spring grows linearly with distance
the fundamental principle behind the spring scale, the manometer, the galvanometer, and the balance wheel of the mechanical clock. The equation holds in
Hooke's_law
Apparent paradox with Faraday's law of induction
axis. The result is that the galvanometer registers no current. The disc and magnet are spun together. The galvanometer registers a current, as it did
Faraday_paradox
Closed loop path containing a magnetic flux
generators, transformers, relays, lifting electromagnets, SQUIDs, galvanometers, and magnetic recording heads. The relation between magnetic flux, magnetomotive
Magnetic_circuit
French scientist (1788–1878)
was observing static electricity. In 1825 he invented a differential galvanometer for the accurate measurement of electrical resistance. In 1829 he invented
Antoine_César_Becquerel
Loudspeaker part
faithfully. The term "voice coil" has been generalized and refers to any galvanometer-like mechanism that uses a solenoid to move an object back-and-forth
Voice_coil
Mirror galvanometer by James W. Queen & Company
James_W._Queen_&_Company
Measurement of electric current
Diagram of D'Arsonval/Weston type galvanometer. As the current flows from + terminal of the coil to − terminal, a magnetic field is generated in the coil
Current_sensing
Technology that uses a laser to cut materials
converting Laser drilling Laser engraving List of laser articles Mirror galvanometer Water jet cutter Oberg & Jones 2004, p. 1447. Thomas, Daniel J. (February
Laser_cutting
British physicist
the moving coil oscillograph, as well as the thermo-ammeter and thermo-galvanometer. Duddell was born William Du Bois to Frances Kate Du Bois, who married
William_Duddell
French electrical engineer
Deprez's and Carpentier's "fishbone" galvanometer (MHS Geneva)
Marcel_Deprez
Sensor of ion concentration in a solution
new one. In use, the electrode wire is connected to one terminal of a galvanometer or pH meter, the other terminal of which is connected to a reference
Ion-selective_electrode
Watch model by Rolex
impulse provided by a stepping motor mechanically similar to a d'Arsonval galvanometer. In 2025, Rolex introduced the Land-Dweller, inspired by the Oysterquartz
Rolex_Oysterquartz
Early system for transmitting text over wires
deflect a compass needle. In the same year Johann Schweigger invented the galvanometer, with a coil of wire around a compass, that could be used as a sensitive
Electrical_telegraph
Early radio receiver component
the DC output current of the detector was registered by a sensitive galvanometer, and in test instruments such as wavemeters used to calibrate the frequency
Crystal_detector
British physicist (born 1942)
which he later called "SLUG" (Superconducting Low-inductance Undulatory Galvanometer). He obtained his doctorate in 1968. Clarke has said at various times
John_Clarke_(physicist)
Spectral density of light emitted by a black body
power." Stewart measured radiated power with a thermo-pile and sensitive galvanometer read with a microscope. He was concerned with selective thermal radiation
Planck's_law
Law of electrical current and voltage
source in terms of internal resistance and constant voltage. He used a galvanometer to measure current, and knew that the voltage between the thermocouple
Ohm's_law
Transoceanic communication line placed on the seabed
minimized current by resonating the cable, and a sensitive light-beam mirror galvanometer for detecting the faint telegraph signals. Thomson became wealthy on
Submarine communications cable
Submarine_communications_cable
Scottish physicist and mathematician (1847-1925)
Coils" (ibid, 1892) "On a New Reflecting Galvanometer of great sensibility, and on New Forms of Astatic Galvanometers", jointly with T Gray (Proc Roy Soc,
Andrew_Gray_(physicist)
Instrument that records seismic waves by measuring ground motions
photomultiplier. The voltage generated in the photomultiplier was used to drive galvanometers which had a small mirror mounted on the axis. The moving reflected light
Seismometer
Device used to measure the amount of light
use silicon sensors. They indicate the exposure either with a needle galvanometer or on an LCD screen. Selenium light meters use sensors that are photovoltaic:
Light_meter
Device used to produce magnetic fields
his work was specifically describing the construction of a sensitive galvanometer designed to detect a single current source. It follows that the ampere-turns
Maxwell_coil
English chemist and physicist (1791–1867)
When it is moved in or out of the large coil (B), its magnetic field induces a momentary voltage in the coil, which is detected by the galvanometer (G).
Michael_Faraday
well-known Daniell cell. When this acid-alkali cell was monitored by a galvanometer, current was found to be constant for an hour, the first instance of
History_of_electrochemistry
Type of electrical telegraph
magnetic effect of the current. Johann Schweigger had already invented the galvanometer (in September) using such a multiplier, but Ampère either had not yet
Needle_telegraph
Long distance transmission of text
day to send a message despite the use of the highly sensitive mirror galvanometer developed by William Thomson (the future Lord Kelvin) before being destroyed
Telegraphy
Multidisciplinary field of engineering
passing through a coil of wire and inducing current that was measured by a galvanometer. Faraday's research and experiments into electricity are the basis of
Electromechanics
Genus of fishes in South America
animal's impulses were electrical by observing sparks and deflections on a galvanometer. He observed the electric eel increasing the shock by coiling about its
Electric_eel
Central organ of the human nervous system
century Emil du Bois-Reymond and Hermann von Helmholtz were able to use a galvanometer to show that electrical impulses passed at measurable speeds along nerves
Human_brain
Topics referred to by the same term
lower voltage to a higher DC voltage. Schweigger multiplier, an early galvanometer Multiplier (economics), any measure of the proportional effect of an
Multiplier
Topics referred to by the same term
electrophysiological activity in the body electrography (disambiguation) galvanometer This disambiguation page lists articles associated with the title Electricity
Electricity_detection
Church in Greater Manchester, England
practical electric motor, and the commutator. He also further developed the galvanometer and Alessandro Volta's voltaic battery. The slab's unusually modest design
Church of St Mary the Virgin, Prestwich
Church_of_St_Mary_the_Virgin,_Prestwich
2011 soundtrack album by Howard Shore
listing No. Title Length 1. "Burghölzli" 1:23 2. "Miss Spielrein" 1:37 3. "Galvanometer" 1:04 4. "Carriage" 1:08 5. "He's Very Persuasive" 2:14 6. "Sabina" 0:57
A Dangerous Method (soundtrack)
A_Dangerous_Method_(soundtrack)
Electric current produced in living cells
currents in live tissues and organisms with a then state-of-the-art galvanometer made of insulated copper wire coils. He unveiled the fast-changing electricity
Developmental_bioelectricity
Device that measures electric current
pointing North when a current flowed in an adjacent wire. The tangent galvanometer was used to measure currents using this effect, where the restoring force
Ammeter
Camera brand
FT's exposure control system was a "center-the-needle" system using a galvanometer needle pointer moving vertically at the lower right side of the viewfinder
Nikkormat
been Henley's original prototype. Around 1858 Henley developed a needle galvanometer that was installed at the Valentia Island, Ireland shore end of the 1858
William_Thomas_Henley
British engineer and inventor
carried out investigations with fellow physicist William Crookes using a galvanometer to make measurements of the supposed phenomena. In 1871, he authored
C._F._Varley
Process of forming order by local interactions
and universal assembly. By contrast, the four concurrently connected galvanometers of W. Ross Ashby's Homeostat hunt, when perturbed, to converge on one
Self-organization
Circuit used in galvanometers
Ayrton shunt or universal shunt is a high-resistance shunt used in galvanometers to increase their range without changing the damping. The circuit is
Ayrton_shunt
Branch of underwater warfare
shore station once a 'swing' had been detected on the indicator loop galvanometer. Indicator loops used with controlled mining were known as 'guard loops'
Anti-submarine_warfare
British mathematician and electrical engineer (1850–1925)
of Wheatstone's Bridge for measuring a Given Resistance with a Given Galvanometer and Battery' which received positive comments from physicists who had
Oliver_Heaviside
by comparing the indications on two independent galvanometers, one for each armature. The galvanometers had to be calibrated with the correct headings
Earth_inductor_compass
1979 35mm single-lens reflex camera
centerweighted, silicon photodiode light meter. A left side viewfinder galvanometer needle pointer indicated the exposure on a shutter speed scale. The viewfinder
Nikon_EM
using a small selenium photovoltaic cell behind a lens array, powering a galvanometer. The film speed for the metering system can be set from 10 to 800 ASA
Yashica_Lynx
Austrian inventor (1795–1876)
Nobili multiplier (galvanometer with a double needle) by Ekling (1834)
Johann_Michael_Ekling
Type of spring
metal &c. This led to its use in other scientific instruments, such as galvanometers, and the Nichols radiometer which measured the radiation pressure of
Torsion_spring
French physicist
phenomena. In his studies of electricity, he designed sine and tangent galvanometers. Pouillet developed and corrected Joseph Fourier's work on the surface
Claude_Pouillet
Baltic German inventor (1905–2003)
the Minox T8 pocket telescope. Walter Zapp (1944). "Ein russisches Galvanometer". Physikalische Blätter (in German). 1 (9): 138–140. doi:10.1002/phbl
Walter_Zapp
Determining gun location from its sounds
French had made an important development. They had taken the string galvanometer and adapted it to record signals from microphones onto photographic film
Artillery_sound_ranging
Simple radio receiver circuit for AM reception
battery through the crystal, and used a galvanometer to measure it. When microwaves struck the crystal the galvanometer registered a drop in resistance of
Crystal_radio
American physicist and ufologist (1926–2006)
telescopes, low- and high-frequency audio detectors, cameras, and a galvanometer to measure variations in the Earth's gravitational field. Oxford University
Harley_Rutledge
accumulates at the outer rim. The accumulation of charges can be measured by a galvanometer. This effect is proportional to the mass of the charge carriers. It is
Stewart–Tolman_effect
variation corresponds to a constant length of recording paper, and a galvanometer suitable for measuring the intensity of the electric current, whose response
Polarograph
Gaining awareness of biological processes
electrocerebrogram in 1912. Forbes reported the replacement of the string galvanometer with a vacuum tube to amplify the EEG in 1920. The vacuum tube became
Biofeedback
Jungian theories
Eugen Bleuler, he also conducted research with his colleagues using a galvanometer to evaluate the emotional sensitivities of patients to lists of words
Analytical_psychology
Topics referred to by the same term
Production string Brock string, an instrument used in vision therapy String galvanometer, an instrument that provided the first practical electrocardiogram (ECG)
String_(disambiguation)
French physicist and inventor (1844–1940)
plates. When the electrical circuit, consisting of a Daniell cell, a galvanometer of high resistance, and the metallic conductor, consisting of the ebonite
Édouard_Branly
Type of image projector
experiments involving sorts of movement with the magic lantern. These include: galvanometer slide: a flattened coil with a magnetized needle moving from side to
Magic_lantern
GALVANOMETER
GALVANOMETER
GALVANOMETER
GALVANOMETER
Girl/Female
Hindu
Rich or from hadria, Gem, Goddess Lakshmi, Graceful, Singer
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi
Tenth Incarnation of God Vishnu
Girl/Female
Hindu, Indian, Marathi, Sanskrit
Faultless; Clear; Pure
Girl/Female
Hindu, Indian, Traditional
Another Name of Draupadi
Female
Swedish
Swedish form of Old Norse ÞorrÃðr, THORRIDH means "Thor's beauty."
Boy/Male
British, Czechoslovakian, English
Loving Peace
Girl/Female
Assamese, Gujarati, Hindu, Indian, Japanese, Kannada, Malayalam, Marathi, Oriya, Sanskrit, Tamil, Telugu
Pigeon with Sweet Voice; Pigeon
Boy/Male
Russian
Rich protector.
Boy/Male
Irish English
Dove.
Biblical
the prince of the people
GALVANOMETER
GALVANOMETER
GALVANOMETER
GALVANOMETER
GALVANOMETER
n.
An instrument for detecting or measuring minute extension or movements of solid bodies. It consists essentially of a small rod, disk, or button of carbon, forming part of an electrical circuit, the resistance of which, being varied by the changes of pressure produced by the movements of the object to be measured, causes variations in the strength of the current, which variations are indicated by a sensitive galvanometer. It is also used for measuring minute changes of temperature.
n.
An instrument or apparatus for measuring the intensity of an electric current, usually by the deflection of a magnetic needle.
a.
Making a beat without recoil; giving indications by a single beat or excursion; -- said of galvanometers and other instruments in which the needle or index moves to the extent of its deflection and stops with little or no further oscillation.
v. t.
A conducting circuit joining two points in a conductor, or the terminals of a galvanometer or dynamo, so as to form a parallel or derived circuit through which a portion of the current may pass, for the purpose of regulating the amount passing in the main circuit.
v. t.
To provide with a shunt; as, to shunt a galvanometer.
a.
Of, pertaining to, or measured by, a galvanometer.
n.
An instrument of extreme sensibility, used to determine slight differences and degrees of heat. It is composed of alternate bars of antimony and bismuth, or any two metals having different capacities for the conduction of heat, connected with an astatic galvanometer, which is very sensibly affected by the electric current induced in the system of bars when exposed even to the feeblest degrees of heat.
n.
An instrument for measuring currents, especially the force or intensity of electrical currents; a galvanometer.