This float switch is not capable of working correctly. If you are depending on it saving your boat you are mistaken. I am sending one of the two that I bought to the Coast Guard to show what a bad product this is. I put it in my 32 foot boat and then tried it out. It did not come on when it floated and then after I lifted it and shook it it came on and then would not go off when the water was siphoned out.
I have never had to write a bad survey or wanted to until now. May be I will save someones boat.