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在1977年的计量展览会上,James Neill公司和QualityMeasurement Inc 公司分别展出了两种电子千分尺,其共同特点是:用手拿着检查;有内装电源便于携带;用数字显示方法读数。这两种千分尺的精度为0.0001时或0.002毫米,与普通千分尺比较,其主要优点是测不同的直径速度快,并能直接读数,也不受磨损的影响。但这种千分尺的成本比普通千分尺或机械式直接读数千分尺贵好几倍。据制造公司估计,在两年时间内,这种千分尺即占市场总销售量的10～2O%左右。电子千分尺能在多大程度上取代现有机械式千分尺尚待进一步观察,但是随着工业部门对电子千分尺日益熟悉,这种千分尺将更多地得到使用,并将给
At the Metering Trade Show in 1977, James Neill and Quality Measurement Inc. each exhibited two types of electronic micrometers, all in common: hand-held inspection; built-in power for easy carrying; and digital display of method readings. The accuracy of the two micrometers is 0.0001 or 0.002 mm, compared with the average micrometer, the main advantage of measuring different diameter fast, and can be directly read, but also from the impact of wear and tear. However, the cost of a micrometer is several times more expensive than an ordinary micrometer or a mechanical direct-reading micrometer. According to manufacturing company estimates, in two years, this micrometer that the total market sales of about 10 ~ 2O%. The extent to which electronic micrometers replace existing mechanical micrometers remains to be seen, but as the industrial sector becomes more familiar with electronic micrometers, the micrometer will be used more and will give