JD25-C /JD-25 Digital Universal Length Metroscope Measuring range (mm): External size: Absolute measurement: 1-100 Comparative measurement: 0-670 Internal size: When using small measuring hook (maximum insert depth 12, maximum wall thickness 50): 10-400 When using large measuring hook (maximum insert depth 50, maximum wall thickness 85): 30-370 When using electronic measuring hook: 1-60mm When using universal measuring hook: 14-112mm Measurement of internal thread mid-diameter: When using small measuring hook (thread small diameter 13-30mm) When using large measuring hook [thread small diameter 31 ~ (70 ¨C wall thickness) X 2 ] Digital resolution: 0.1um Accuracy repeatability of the instrument£º .External-size measurement¡¡¡¡¡¡¡¡¡¡0.3¦Ìm .Internal - size measurement¡¡¡¡¡¡¡¡ 0.5¦Ìm Accuracy of instrument: While direct measurement of external size, accuracy of instrument is superior to (0.5 + L/200) um While measurement of internal size, accuracy of instrument is superior (1 +L/100) um