A Digital Perpendicularity Tester is a tool used to gauge how perpendicular a surface or edge is to a reference plane. Numerous industries, including precision machining, metrology, metallurgy, and many others, frequently use this test. During the test, a digital sensor or laser is used to measure how far the surface or edge is from a true 90-degree angle. The outcomes, which are typically presented digitally, can be used to assess the accuracy and caliber of a manufactured good or to check the caliber of a workpiece's surface or edge.