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Goals and Symptoms
Please inform me about the right voltage level and type (AC or DC) of the probe of RM35LM33MW relay (2007 Zelio Control catalogue page 56)! I see it is 12V, but it is not determined whether it is AC or DC.
Causes and Fixes
DC voltage would create an electrolysis in the liquid to detect.
The voltage of the probe terminal is 12V AC 500Hz. The frequency is design to optimize the detection in all conditions, without being perturbated by EMC