About Us
Diameter Standard Laboratory provides tracibility of internal and external diameter measurements. For internal diameters, the measuring ranges are (0.1-100)mm, while (0.1-300) mm is measuring range of external diameter. Additionally, we provide services for the reference value of thread plug and thread ring according to ISO and JIS standards.
![ring gauge](https://en.nimt.or.th/wp-content/uploads/2021/04/ring-gauge.png)
Plane ring gauge calibration
Diameter of plain ring gauge, master ring gauge and setting ring gauge is used as a standard for many instruments such as hole gauge, tubular inside micrometer, air gauge and thread gauge.
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