Source for low water sensors in my soap/rinse tanks?

[Sequoia]

I want to add an auto-shutoff of the SS pumps if they are in danger of running out of water. I think I need some sort of sensor in the soap and rinse tanks to do that, mounted below the lowest point of the float valve. If those sensors were triggered due to low water conditions it would cut power to the pump.

Can anyone recommend what sensors to consider?

 

[PEI]

A simple horizontal liquid level float switch will do the trick. You will have to put a whole in the tank to mount it though. I have had good luck with SMD. They sell polypropylene, nylon, and stainless versions. There are other manufacturers so you might want to try a Google search.

 

[MEP001]

This is what I've used:

http://www.grainger.com/Grainger/MADISON-Liquid-Level-Switch-5DYC2

It requires a bulkhead fitting which you can get from Kleen-Rite for about $3.

 

[I.B. Washincars]

There is also a bulkhead style switch available, which only need a hole. My old Mark VIIs used them. They look nearly identical to the one MEP uses with the exception of a nut and gasket.