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Agar Scientific specialises in offering and producing a wide range of specimens specifically for TEM calibration where quantification or high resolution results are required. We endeavour to maintain the highest possible preparation standards in their production and where possible, we offer specimens that are certified. Agar Scientific calibration specimens for TEM are renown worldwide for their quality and reliability and each one is checked in an electron microscope. Specimens are rejected for exceeding 5% broken grid squares, for excessive dirt, or for inadequate image quality. These criteria govern every Agar calibration specimen. All specimens are prepared on standard 3.05mm copper grids.

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16 products available

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  1. Fine mesh
    This is available in copper, nickel or gold, in 1000, 1500 and 2000 mesh (1000, 1500 or 2000 repeat distance per inch), ie. 25, 18.75 and 12.5 µm.
    Average lead time: 1 to 26 days

    From £18.03

    Average lead time: 1 to 26 days
  2. Diffraction grating replicas
    Shadow cast carbon replicas of diffraction line gratings.
    Average lead time: 1 to 26 days

    From £31.67

    Average lead time: 1 to 26 days
  3. Mag*I*Cal calibration standard AGS1936
    Using this standard, the three major instrument calibrations: magnification, camera constant for indexing diffraction patterns and image/diffraction pattern rotation, can all be carried out using a single specimen.
    Average lead time: 28 days
    £912.16
    Average lead time: 28 days
  4. Perforated carbon film, 3.05mm grid AGS100
    This specimen is one of the quickest and easiest to use for performance checks since it gives information about nearly all causes of loss of resolution.
    In Stock
    £21.79
    In Stock
  5. High resolution test specimen gold particles on carbon film AGS132
    An arrangement of finely dispersed thin gold particles has an advantage over single crystal gold foil for tests of high resolution imaging capabilities in TEM.
    In Stock
    £45.13
    In Stock
  6. Ferritin, 3.05mm grid AGS126
    Ferritin molecules display a quad structure with a separation of 1.25 nm, which is useful as a resolution check.
    In Stock
    £18.03
    In Stock
  7. Evaporated platinum / iridium, 3.05mm grid AGS114
    The evaporated platinum/iridium specimen is supplied on a perforated carbon support film that provides holes for ease of focus and astigmatism correction.
    In Stock
    £16.53
    In Stock
  8. Combined test specimen, 3.05mm grid AGS142
    A perforated carbon film is shadowed with gold and graphitised carbon particles are deposited.
    In Stock
    £39.68
    In Stock
  9. Standard for HVEM AGS155
    Normal resolution test specimens are difficult to see on the viewing screen because of low contrast.
    In Stock
    £22.53
    In Stock
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