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Dale H, or ?? Can I just short out the sensors?

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richg99
Posts: 5017
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Location: Houston, TX & Crossville, TN

Dale H, or ?? Can I just short out the sensors?

Post by richg99 »

I have a pump that uses sensors
https://smile.amazon.com/Johnson-Pumps- ... 91&sr=8-12

To check it, can I just short out the two sensors with a wire? or must I fill the bilge with water? This assumes that the sensors are clean, of course.

KMixson
Posts: 2129
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Location: North Charleston S.C.

Dale H, or ?? Can I just short out the sensors?

Post by KMixson »

I am not sure of the exact type of sensor you have in that unit or if you can even get to it but I have a water detector sensor for my water heater in my home that I can check by jumping across the probes with a wire. I can also check it by touching the probes with my fingers. The tighter I grip the probes with my fingers the less resistance across the wires and the louder the alarm sounds.

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richg99
Posts: 5017
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Location: Houston, TX & Crossville, TN

Dale H, or ?? Can I just short out the sensors?

Post by richg99 »

That is what I am thinking. I just put the boat into its on-the-water slip yesterday. I don't want to dump a lot of water into it and find out that it isn't working. But, when I pull her out of the water next week, I really would like an easier way to check it out.

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gnappi
Posts: 674
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Location: Southeast Florida (Tri county)

Dale H, or ?? Can I just short out the sensors?

Post by gnappi »

Magnetic or hall effect type switches (I don't know what you have) will not respond to a short because the part of the switch that "closes" is internal to the switch.

Filling the boat on an incline to test a float or sensor and then pulling the plug is no worse than taking a wave over the bow or getting stuck in a rainstorm.

You always have the manual bypass switch if the sensor/switch fails unless you leave it dockside than I'd rig an external float to the bypass switch to make sure Davey Jones doesn't take your boat.

I leave my boat covered on the trailer with the plug out and don't think about the BP.
Regards,

Gary (in South Florida)

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