Question
What would be an appropriate 61F Floatless Level Controllers, Electrode Holders, and Electrodes for detecting the level of seawater?
Answer
Use a low-sensitivity 61F (one with the suffix D on the model number), BS-1T Electrode Holders (titanium), and F03-01 Electrodes (titanium).
If BS-1 or BF-1 Electrode Holders is used, the stainless-steel electrode nuts will corrode and have to be regularly replaced.
Also, allow at least 1 m of space between Electrodes.