We have installed 10 flood sensors(ES101-FL) for our project, out of these 10 2 flood sensors are always showing the false value as 1.

the possible reasons are as below：
1、the sensing cables touch each other。
2、The sensor has been detecting water.
3、if no water, read the register No.2, it will respond 1.
Respond 1,no water;
Respond 2,water。