A sensor or gauge that is placed up against the syringe and a digital readout or indicator that shows the fill height measurement make up the fill height syringe gauge in most cases. A camera or video microscope may be included in some fill height syringe gauges in order to take pictures or videos of the syringe and the fluid level.

In order to guarantee that the syringes are filled to the proper volume and are not overfilled or underfilled, a fill height syringe gauge is frequently used in the medical device, pharmaceuticals, and biotech production process includes a crucial quality control step to guarantee that the syringes are secure and suitable for their intended use. 

The gauge can be used for different types of syringes, including glass and plastic syringes, and can be used for different types of fluids, including liquids, gels, and pastes. It can be run manually or integrated into a manufacturing process for automated testing.