The thickness of any type of textiles depends considerably on the load being exerted on it during measurement of thickness. Also the thickness gets reduced progressively as the load acting on it is increased. Thus it is necessary that the thickness is determined under a specified load so that the value determined could be considered standard. By determination of thickness under different loads, one can get an indication of the resistance of the textile to compression under load, as well as its ability to recover from the effects of such loads after the load is removed.
The Thickness Tester - Digital is designed to measure the thickness of floor coverings under different loads. It consists of a rigid metallic frame having a loading rod held with its axis vertical capable of moving freely in two brass guide bushes. The rod has a flat cylinder indentor fixed on its lower end and a small metallic disc shaped collar fitted on its body. Slotted dead weights of appropriate loading capacity can be placed on this collar to enable different pressures to be applied on the specimen under test. The rod and the load can be raised or lowered with the help of a lever arm.
BS 4051 - 1987 : Determination of Thickness of Textile Floor Coverings
ISO 1765 - 1986 : Machine-made Textile Floor Coverings-Determination of Thickness.