When it comes to detecting fabric density and thickness, fabric density meters and fabric thickness gauges can be used.

A fabric densitometer is an instrument used to measure the density of fabrics. It can measure the number of yarns per unit area of the fabric to calculate the density of the fabric. Common fabric density meters include optical fabric density meters and mechanical fabric density meters. The optical fabric densitometer can measure the density of the fabric by enlarging the image in the instrument, while the mechanical fabric densitometer calculates the density of the fabric by measuring the number of needles per unit length on the fabric.

A fabric thickness gauge is an instrument used to measure the thickness of fabrics. It can measure the thickness of the fabric, so as to judge the quality and scope of application of the fabric. Common fabric thickness gauges include mechanical fabric thickness gauges and digital fabric thickness gauges. Mechanical fabric thickness gauges use a spiral gauge to measure fabric thickness, while digital fabric thickness gauges use high-precision sensors and digital displays to measure fabric thickness.

It should be noted that there are many models and brands of fabric density meters and fabric thickness meters, and the selection should be made according to specific needs and budgets.