Implementation of Bioelectrical Impedance Measuring Instrument Based on Embedded System

Table 3

Difference error between the bioelectrical impedance of human left and right legs at multi frequencies using the developed and standard device.

Frequency (kHz)	Impedance (Ω); Mean value
	Left leg			Right leg
	Standard device	BIA instrument	Diff./error (%)	Standard device	BIA instrument	Diff./error (%)
5	322.1	311.1	3.42	317.5	302.3	4.79
50	305.3	291.2	4.62	299.7	283.6	5.37
100	299.1	286.8	4.11	273.4	280.2	2.49
150	298.1	282.1	5.37	292.4	275.4	5.81
200	288.9	276.4	4.33	280.3	269.6	3.82
250	280.2	272.1	2.89	274.2	264.2	3.65
300	276.6	270.6	2.17	269.4	262.4	2.60
400	271.8	267.3	1.66	262.9	260.7	0.84