$6 Float Switch

[Brian Prestwood]

The best I've ever seen these for is $15.

Float Switch (http://www.floatswitches.net/floatswitch.html)

[Ruminari]

I wouldn't trust that as far as I could throw it. The image is proof of the rip off that the site is promoting. (For scale they inserted a second picture of a quarter)

[barebottoms]

http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?Ref=253499&Row=263096&Site=US

Nice to buy from an electronics store since you're going to be using relays and stuff too. They have the Q-Prox capacitance sensors too.

[Gigus]

I am curious as to the application. I usually use a float valve for water makeup connected to a DI/RO unit. Is this switch for a pump on a wave system?

[thereefgeek]

Originally posted by Ruminari
I wouldn't trust that as far as I could throw it. The image is proof of the rip off that the site is promoting. (For scale they inserted a second picture of a quarter)

Actually, they work great. I bought four and have two left over if you need one. I even put the link on our website under the resources tab.

[user48953]

Rich.. How do the floats work? Do you use one for the mininum level and one for the maximun level? I may be interested in your 2 left overs.

huy

[Brian Prestwood]

Huy

You use two for switch-on redundancy, not high-low water marks.

Wire them in series. If one sticks on the other will break the circuit. The odds of two sticking on are pretty slim.

I used to have just one on my topoff system. It drained my top off a couple of times before I added the second about two years ago. It hasn't stuck on since.

[Brian Prestwood]

Here's a tip. Plug a computer switch, the kinds with a switch for each piece, into the water level sensor. Then, plug a pump for each top of topoff (water, kalkwasser, exchange water) you do. You can choose which pump turns on when the water level is low by setting the switches on the computer power switch.

[headshrink]

Originally posted by xdroccax
How do the floats work?

huy

Just setup mine. It looks like it is a magnetic switch... totally sealed from water. I threaded the wires through airline tubing, others use PVC...