Multiple I2C sensors and libraries using Arduino(s) on a Water Tank ( Wireless )

Juraj:
in the tables there is no mention about a register address. device address is 112 decimal and in the code it is used in beginTransmission and the command "take a "range reading" 81 decimal (51 hexa) is written.

So, the code is good ?

Could you explain me the step 5 ? is this a systematic way to read values ?

Thank you.