D.E.V.I.C.E. is an encyclopedia of terms used by manufacturers of test and measurement equipment. T&M Atlantic created this service to better explain the functionality of instruments it offers, and to highlight the latest developments in the world of T&M Atlantic. We are using such tools as flash and animation to bring words and pictures to life and to create not just an understanding but also an appreciation for technology that goes into the design of every instrument.
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The ampere (symbol: A) is the SI unit of electric current (symbol: I) and is one of the seven SI base units. It is named after AndréMarie Ampère (1775–1836), French mathematician and physicist, considered the father of electrodynamics. In practice, its name is often shortened to amp.
Measurement unit that is adopted by convention for a base quantity. For example: The International System of Units (SI) defines seven units of measure as a basic set from which all other SI units are derived.
The candela (symbol: cd) is the SI base unit of luminous intensity; that is, power emitted by a light source in a particular direction, weighted by the luminosity function (a standardized model of the sensitivity of the human eye to different wavelengths, also known as the luminous efficiency function).
Measurement unit for a derived quantity.
Examples: the metre per second (m/s) and the centimeter per second (cm/s) are derived units of speed in the SI. The kilometre per hour (km/h) is a unit of speed outside the SI but accepted for use with the SI. The knot, equal to one nautical mile per hour, is a unit of speed outside the SI.
A unit of measurement of the optical power of a lens or curved mirror, which is equal to the reciprocal of the focal length measured in metres (that is, 1/metres).
The kelvin is a unit of measurement for temperature. It is one of the seven base units in the International System of Units (SI) and is assigned the unit symbol K.
The kilogram or kilogramme (kg) is the base unit of mass in the International System of Units (SI) which is the modern standard governing the metric system.
It is a scalar quantity, defined and adopted by convention, with which any
other quantity of the same kind can be compared to express the ratio of the
two quantities as a number.
The mole is a unit of measurement used in chemistry to express amounts of a chemical substance. It is one of the base units in the International System of Units, and has the unit symbol mol.
SI derived unit of force. It is equal to the amount of net force required to accelerate a mass of one kilogram at a rate of one meter per second squared.
The standard unit of angular measure, used in many areas of mathematics. An angle's measurement in radians is numerically equal to the length of a corresponding arc of a unit circle, so one radian is just under 57.3 degrees (when the arc length is equal to the radius).
The second (SI symbol: s), sometimes abbreviated sec., is a unit of measurement of time, and is the International System of Units (SI) base unit of time. It may be measured using a clock.
The siemens (SI unit symbol: S) is the unit of electric conductance, electric susceptance and electric admittance in the International System of Units (SI).
The volt (symbol: V) is the SI derived unit for electric potential (voltage), electric potential difference, and electromotive force. The volt is named in honor of the Italian physicist Alessandro Volta.
The watt (symbol: W) is a derived unit of power in the International System of Units (SI), named after the Scottish engineer James Watt.
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Units Converter
This universal gadget converts 10 types of measurement units: Length, Weight, Temperature, Volume, Area, Speed, Time, Pressure and Energy.
It is easy to use and is available in English and Spanish.
Choose your language
Choose the measurement type
Enter values
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