KITA 's: a little help needed

[G+_Dan Baldwin]

KITA's: a little help needed.

 

I built an automated alert system for our household chlorination system that would warn when the chlorine tank was low and needed to be refilled. I used a generic plastic float switch connected to a raspberry pi that would flash an LED and send an email to my phone. It worked beautifully until the chlorine/water solution ate the float! I replaced it with a stainless steel float; again, it worked great until the chlorine reacted to the stainless and not only ate the float but actually burned a hole in the plastic tank! So I need suggestions as to an alternative to a float system. The system is part of our household water supply which injects a small amount of chlorine to kill the bacterial sulphur and is filtered out through multiple filters. Thanks!

[G+_Robert Hafer]

First a reminder, not all Stainless Steel is created equal. Some grades of Stainless are more resistant than others.

Likely what you want is some kind of fluorinated plastic, like Teflon. Titanium or ceramic would work but are less practical.

[G+_Damien Wessling]

This chart gives you a quick matrix of material/chemical compatibility.

 

plasticsintl.com - Plastics Chemical Resistance Chart | Plastics International

[G+_Dan Baldwin]

Damien Wessling thanks for the chart! It appears the CPVC composition is the way to go. A quick search on amazon came up with this, a little pricey though! It appears what I described as a plastic float was in fact listed as a styrofoam float, even though it had a plastic appearance.

[G+_Golden Retriever]

Try one of those plastic arms that flips up the toilet flapper in the bottom of your water tank in the back of your toilet take that put a switch on one end on the other end glue a plastic bobber

[G+_Jim Hofmann]

You might also consider q SR04 Ultrasonic distance measuring to the surface of the liquid. No contact. Although the chlorine gas would probably eat that also. :) Good Luck.

[G+_John Sullivan]

I would suggest an outside-mounted detector. RV camper supply shops have an assortment used to detect the level inside Propane cylinders .. you might ask them if they have something that would work in your case.