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英国Thomas Mercer气动量仪公司的标准和生产控制实验室使用了蔡司厂(耶拿)的Metroscopes量仪。经常用两台万能卧式Metroscopes仪来测量参考样柱的外径、参考环规的直径、检验楕圆度和锥度。由于这种仪器工作快速而准确,所以每月可检500～600件,精度为±20微吋(0.6微米)。仪器上采用了光学和机械装置,可作直接测量或比较测量用;外测尺寸为0～4吋(0～101毫米)。内测尺寸为0.078～4吋(2～101毫米)。这种仪器还可用来测量外螺纹的中径。
The Thomas Mercer Pneumatic Meters Company’s standards and manufacturing control laboratories use the Metrology Sawyer (Jena) Metroscopes. Often with two universal horizontal Metroscopes instrument to measure the outer diameter of the reference sample column, reference ring diameter, test roundness and taper. Because of the fast and accurate operation of this instrument, 500 to 600 pieces can be inspected per month with an accuracy of ± 20 micro-inches (0.6 microns). The instrument uses optical and mechanical devices, can be used for direct measurement or comparison measurement; external measurement size of 0 to 4 inches (0 to 101 mm). The internal dimensions are 0.078 to 4 inches (2 to 101 mm). This instrument can also be used to measure the diameter of the male thread.