What instrument is used to determine a body fat?

A common instrument used to determine body fat is a body fat caliper, which measures skinfold thickness at various sites on the body to estimate body fat percentage. Other methods include bioelectrical impedance analysis (BIA) devices, which send a low electrical current through the body, and dual-energy X-ray absorptiometry (DEXA) scans, which provide detailed images of body composition. Each method has its advantages and varying degrees of accuracy.