The durometer apparatus measures the deflection of a calibrated spring as an indenter is pressed into the sample either manually (by hand) or using an operating stand. The indenter protrudes from an orifice in a presser foot, which ensures consistent and repeatable contact between the durometer apparatus and the sample surface.

MEE offers testing for a wide range of materials by using two of the most common durometer types, A and D, as well as the type M micro-hardness durometer. Specimens as thin as 1.25 mm can be reliably measured using the type M durometer.