Technology: How does the Tanita Monitor work?

The key to the Tanita Body Fat Monitor is BIA (Bioelectrical Impedance Analysis.) The BIA method measures body composition by sending a very low, safe electrical signal through the body. The signal passes freely through the fluids contained in lean tissue, such as muscle and bone, but encounters difficulty passing through fat tissue. This difficulty, or resistance, is termed 'bioelectrical impedance', and is accurately measured by the Body Fat Monitor. When set against gender, height, age and weight, the Body Fat Monitor is able to calculate your body fat percentage.