Leak Detection Switch

Question

I need to implement a saline leak sensor/switch. We want to know if saline has leaked out of its container onto the floor of our enclosed machine. I could just sit contacts into it and look at the conductivity, but I don't know about materials and corrosion etc. It would be nice if I could just get a liquid detection switch to input to our PLC.

Any suggestions? I found a nice one that used optical reflection/absorption to tell, but those are not available as far as I could tell.

Thanks!

Former Member · Accepted Answer

Take a look on this product: http://www.panasonic-electric-works.com/peweu/en/html/28287.php Runs also without controller and link directly to your PLC. Chemically resistant housing (PFA)

DAB · Answer

There are a number of "salt taster" circuits available on the web.

If you use good quality stainless steel for the contacts, you should not run into any problems with corrosion.

I would say that is the least cost for benefit solution.

I have not seen any photo-optic sensors for this application, but then I am not fully up to date on the technology.

I hope this helps,

DAB