[Retracted] Design of Ecological Environment Monitoring System Based on Internet of Things Technology

Table 2

The pH test results.

PHSCAN30	Measured value of this system	Relative error
5.0	4.87	-2.60%
5.5	5.35	-2.72%
6.0	5.89	-1.83%
6.5	6.42	-1.23%
7.0	6.94	-0.86%
7.5	7.40	-1.33%
8.0	7.93	-0.88%
8.5	8.38	-1.41%
9.0	8.89	-1.22%
Average	/	-1.56%