TABLE 6. Comparison of Thoracic Impedance Measurement Systems.

	Range ()	Sensitivity ()	Hardware Implementation	Power (mW)	Size (mmmm)	Weight (g)	Data Transfer
[83]	10–10 k	0.1	180 nm	3.9		N/A	SRAM
[85]	10–20	3	Discrete	546		30	Bluetooth
[89]	1–1k	0.1	Discrete	406		200	Bluetooth
[90]	10–40	0.01	Discrete	120		70	Serial
[91]	1–54	0.5	Discrete	14		N/A	RF module
2.4GHz nRF24L01
[92]	1–54	0.5	Discrete	N/A	N/Z	N/A	RF module 2.4GHz nRF24L01
[95]	1–1k	0.001	350 nm	100	N/A	N/A	N/A
[98]	1–10k	1	130 nm	3		12.3	RF module 433MHz QAM-TX2