As I indicated in a prior post, I went with the Johnson pump
and Johnson "Ultima" electronic switch. So far, so good. Though...I just read a SN thread in which the OP states he is having the exact same problem with the Ultima as I had with the Witch Switch (it wouldn't shut off).
In addition, I was going to give the Witch Switch 217 a try (I had the single sensor unit before), as it fit my purposes better than the Ultima for another pump
I have. My supplier says they no longer carry it, because Witch Switch won't warranty it for longer than a year! Seems like electronic bilge switches might not be up to the job. Hope thats not the case because I like the concept. How are the other Witch Switches mentioned in this thread doing?