I want to use an iron tank without using a ground electrode of the Floatless Level Controllers "61F".

If the ground electrode line is connected to the tank, there is no problem.

In some cases, however, the tank has insulation coating on its internal walls, so make sure to check in advance that the system operates correctly.

However, do not use this method in the location where there is a noise source such as an inverter, because it may result in malfunctions.