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  2. Combination square - Wikipedia

    en.wikipedia.org/wiki/Combination_square

    A combination square is a multi-purpose measuring and marking tool used in metalworking, woodworking, and stonemasonry. It is composed of a rule and one or more interchangeable heads that can be attached to the rule. [1] [2] Other names for the tool include adjustable square, combo square, and sliding square.

  3. Magnetometer - Wikipedia

    en.wikipedia.org/wiki/Magnetometer

    However, magnetic torque magnetometry doesn't measure magnetism directly as all the previously mentioned methods do. Magnetic torque magnetometry instead measures the torque τ acting on a sample's magnetic moment μ as a result of a uniform magnetic field B, τ = μ × B. A torque is thus a measure of the sample's magnetic or shape anisotropy.

  4. Evans balance - Wikipedia

    en.wikipedia.org/wiki/Evans_balance

    An Evans balance, also known as a Johnson Matthey magnetic susceptibility balance, is a scientific instrument used to measure the magnetic susceptibility of solids and liquids. [ 1 ] [ 2 ] Magnetic susceptibility quantifies the extent to which a material becomes magnetized in an applied magnetic field .

  5. Epstein frame - Wikipedia

    en.wikipedia.org/wiki/Epstein_frame

    is the average magnetic path length = 0.94 (constant value) m {\displaystyle m~} is the mass of the sample in kilograms If all conditions are as defined in the standard, the standard deviation of the reproducibility of the values is not greater than 1.5% up to 1.5 T [ clarification needed ] for non-oriented electrical steel and up to 1.7 T for ...

  6. Faraday balance - Wikipedia

    en.wikipedia.org/wiki/Faraday_balance

    An alternative method for measuring magnetic susceptibility is the Gouy balance. In this technique there is an inhomogeneous magnetic field in the central region between two (flat) poles of a magnet, either a permanent magnet or an electromagnet. The sample must be in powder form and is placed in a cylindrical tube, which is then suspended in ...

  7. Gradiometer - Wikipedia

    en.wikipedia.org/wiki/Gradiometer

    The result coming from the device is the difference in magnetic flux at that point in space, in other words, the result is the difference between what each of the magnetometers detects. Biaxial gradiometer. This device consists of three magnetometers measuring the gradient of the magnetic field in two directions. Triaxial gradiometer. This ...