Table 1.

The relationship among height, voltage, RI, water pressure.

Height (cm)	Voltage (mV)	RI (RIU)	Pressure (Pa)
0	0.91	2.22 × 10−9	0
5	30.41	7.42 × 10−8	500
10	60.80	1.48 × 10−7	1,000
15	91.76	2.24 × 10−7	1,500
20	122.78	2.99 × 10−7	2,000
45	253.45	6.18 × 10−7	4,500