Overly smart bilge pump switches?

SensaSwitch lr

Navagear found a solid state bilge pump switch that can discriminate between fuel/oil and water, so presumably you will not pump the bad stuff overboard. I’m just a wee bit skeptical about how well this works in the real world. What if there is just a little oil swirling around your bilge; might the switch shut down when you didn’t really want it to? A while back I tested SensaSwitch (above), another solid state “float” switch that I liked a lot. It does not claim to “discriminate” against hydrocarbons but one reader wrote in claiming that oil films made it stick on or off, which of course is what no-moving-part switches are supposed to avoid (my test didn’t include oil!). The company tried to investigate the claim but the guy said he’d thrown the switch away, and his email went dead, so this report is very much hearsay. Does anyone out there have either SensaSwitch or Water Smart Switch installed in their boat?



Ben Ellison

Ben Ellison

Panbo editor, publisher & chief bottlewasher from 4/2005 until 8/2018, and now pleased to have Ben Stein as a very able publisher, webmaster, and editing colleague. Please don't regard him as an "expert"; he's getting quite old and thinks that "fadiddling fumble-putz" is a more accurate description.

1 Response

  1. Ben Ellison Ben Ellison says:

    A reader named Steve wrote in:
    “I have had a SensaSwitch on my boat in Greece for 1 year now with zero problems. I also have a WaterWitch, no problems. My only complaint is that sensaswitch want $11 to ship. High when you see it is light as a feather & cost $25.”

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