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Chrome on Glass. Linear Reference Scales: Glass Size - 1.5" x 3". Scale Length - 1 inch X & Y axis, 25 mm X-axis only. Divisions- English = 0.0005”; Metric = 10um (0.010 mm, With numerical labeling every 0.1 mm and 0.05”. All EMS micrometers come in a sturdy wooden box. With Calibration.
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The Walton and Beckett graticule is for counting fibrous dust (asbestos or glass fibers) and particularly where the majority of fibers to be counted are shorter than 5 microns. The circle is divided into four by two diametrical lines scaled in units of 5 and 3 microns respectively. 3 and 5 microns are the critical measurements of fiber lengths and diameters used in fiber counting. Walton and Beckett include shapes with an aspect ratio of 3:1 or 5:1 for comparing to fibers.
IMPORTANT NOTE: The circle on these Walton & Beckett graticules must represent 100 microns at the stage and each one must be manufactured to the individual instrument. 3:1 ratio is useful where the majority of fibers to be counted are shorter than 5 um. Size: 20.4 mm
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This test slide for calibration in asbestos analysis is made in the UK and is under license from the National Physical Laboratory. It is an epoxy replica of a master slide produced and certified by that laboratory. The replicas are mounted on microscope slides of 1.2 mm thickness with cover glass of 0.17 mm thickness. This information is transferred to the accompanying table, which indicates the maximum phase change passing through test objects to test slide. A satisfactory system will detect block 5. Full details are supplied with the slide.
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For optimum viewing, fluorescent screens should be recoated regularly. Viewing screens are easily damaged by the electron beam, especially at high accelerating voltages where knock-on damage can be severe. A proprietary process where 1 to 2 micron particles of phosphor are deposited on the screen and produce the highest possible resolution.
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These stage micrometers are available with a calibration certificate that provides traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, necessary under ISO provisions. The glass discs are mounted in stainless steel slides with engraved serial numbers. Each slide is supplied in a polished wooden storage case. A UKAS accredited laboratory carries out measurements at selected points on the scales and grids and issues a calibration certificate.
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Platinum apertures are easily cleaned by either an aperture flamer or over a bunsen burner in the open air. We maintain a wide variety of Platinum Drilled Apertures in stock with different configurations suiting all of your needs. Nominal hole diameter: +/- 1 micron. Disc diameter: +/- 10 microns. Disc thickness: +/- 10 microns Size: 200 µm O.D.: 3 mm Thickness: 0.24 mm
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High quality, precision made standard reticles are manufactured to use with our microscope eyepieces. All recticles are chrome on glass and positive polarity. Size: 21 mm Gap: 0.075 mm
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High quality, precision made standard reticles are manufactured to use with our microscope eyepieces. All recticles are chrome on glass and positive polarity. Size: 19 mm Scale: 5 mm Divisions: 0.1 mm x 50
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High quality, precision made standard reticles are manufactured to use with our microscope eyepieces. All recticles are chrome on glass and positive polarity. Size: 19 mm Line width: 13 µm
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Used as a horizontal and a vertical scale, they are especially useful when interested in measurement in different axis. Crossed Micrometer scale (imperial). Size: 24 mm Divisions: 0.8' with 400 divisions of 0.002" Surface: Chrome image
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