A Digital Transparency Tester is a tool used to gauge a material's transparency, usually a plastic sheet or film. It operates by shining light through the substance and counting how much of it makes it through. Usually, the measurement is expressed as a percentage of transmission, haze, or another optical property of the substance.

A light source, a sensor or detector, and a digital readout or indicator that displays the measurement are the typical components of a digital transparency tester. In order to take pictures or videos of the substance being tested, some testers can also be fitted with a camera or a microscope.

To make sure that plastic films and sheets adhere to industry standards for transparency and quality control, digital transparency testers are frequently used in the plastics sector. It is also used to test the transparency of materials used in other industries, including packaging, printing, and automotive.