Hello, I wonder if Electrical Conductivity meter from DFRobot is designed to work permanently…
Sergi Barreda Lacambra
2

Hello Sergi. Dfrobot have said that the probe that comes with the EC meter is meant for use in a lab, not industry, and is not meant to be used permanently immersed in a liquid forever. That being said we’ve used it for months with no problems.
There is a range of EC probes, you need to get one with K = 1.0. We got one of the cheapest, E201WM, it’s ugly as hell and seems to work fine. They are about 20 quid on ebay. 
Are you putting together a hydroponic system?

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