Coldbreak Brewing Giveaway - Open to All!

Home Brew Forums > Home Brewing Beer > Electric Brewing > Float switch suggestions
Reply
 
Thread Tools
Old 12-21-2012, 08:02 PM   #1
jsguitar
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
jsguitar's Avatar
Recipes 
 
Join Date: May 2011
Location: Overland Park, KS
Posts: 1,120
Liked 103 Times on 81 Posts
Likes Given: 635

Default Float switch suggestions

I've been wanting to add a float switch to my HLT since in the past I've accidentally dry fired my element. I've seen mention of people using one of these http://www.ebay.com/itm/Sus304-Stain...item3f2048ec9d

Does anyone using one of these float switches have any trouble fitting it in the kettle with a HERMS coil installed? I'm not near my HLT right now but I wasn't sure if there was enough room to squeeze one in. It looks like a really close fit.

Also, I thought it'd be nice to have one that had 1/2" NPT threads so it could be installed into a full coupling from the inside of the kettle instead of weldless.

I've contacted Auber Ins. about this and they are interested in carrying a float switch for us electric brewers. They thought it would not be a problem and that they had enough market for it, they just need to know what options people would prefer.

So what do you all think about design, dimensions, wiring options-panel mount, qd ect? Is it even necessary to have something different than what's already available? Just spitballing here, thanks!



Reason: fixed link
jsguitar is offline
 
Reply With Quote
Old 12-23-2012, 02:10 AM   #2
Bsquared
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Bsquared's Avatar
Recipes 
 
Join Date: Oct 2006
Location: San Diego
Posts: 1,829
Liked 57 Times on 52 Posts
Likes Given: 22

Default

I have one in my HLT, its a tight fit, and the HX coil is a little Higher than Id like because of it. If any thing Id like it to be longer so the HX coil could fit around it.


Bsquared is offline
 
Reply With Quote
Old 12-23-2012, 05:29 PM   #3
jsguitar
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
jsguitar's Avatar
Recipes 
 
Join Date: May 2011
Location: Overland Park, KS
Posts: 1,120
Liked 103 Times on 81 Posts
Likes Given: 635

Default

Quote:
Originally Posted by Bsquared View Post
I have one in my HLT, its a tight fit, and the HX coil is a little Higher than Id like because of it. If any thing Id like it to be longer so the HX coil could fit around it.
Thanks.

How much clearance is there between the float and the kettle wall? I'm thinking if it didn't stick out quite as much it would be easier to install near the wall and not have to have it come up through the HERMS coil.
jsguitar is offline
 
Reply With Quote
Old 12-23-2012, 06:55 PM   #4
Bsquared
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Bsquared's Avatar
Recipes 
 
Join Date: Oct 2006
Location: San Diego
Posts: 1,829
Liked 57 Times on 52 Posts
Likes Given: 22

Default

I'm not home but I think it is about 3/4-1.5" off the wall. the float is about 1"in diameter so there is room to get it closer to the wall. If there are some engineers looking to make some thing too, a sight gage/level sensor would be awesome! but Ill settel for a better float switch.

Click image for larger version

Name:	IMG_1118.jpg
Views:	283
Size:	30.5 KB
ID:	89994

Click image for larger version

Name:	IMG_1150.jpg
Views:	296
Size:	44.7 KB
ID:	89995

Click image for larger version

Name:	IMG_1608.jpg
Views:	280
Size:	25.6 KB
ID:	89996

Click image for larger version

Name:	IMG_1636.jpg
Views:	285
Size:	32.3 KB
ID:	89997
Bsquared is offline
 
Reply With Quote
Old 12-23-2012, 07:25 PM   #5
jsguitar
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
jsguitar's Avatar
Recipes 
 
Join Date: May 2011
Location: Overland Park, KS
Posts: 1,120
Liked 103 Times on 81 Posts
Likes Given: 635

Default

Awesome! Thanks for the pics and the info.

I've ordered one of those float switches from China to play around with along with some Switchcraft dc connectors and a switch.

I'm looking forward to being able to work on this for my own set up.
jsguitar is offline
 
Reply With Quote
Old 02-15-2013, 07:48 PM   #6
jsguitar
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
jsguitar's Avatar
Recipes 
 
Join Date: May 2011
Location: Overland Park, KS
Posts: 1,120
Liked 103 Times on 81 Posts
Likes Given: 635

Default

So I got around to installing a float switch in my HLT and everything is working.

I had previously soldered a 1/2" half coupler for an anode, so I used that coupling and a 1/2"x1/4" NPT SS bushing from a sightglass I accidentally broke from brewhardware.com. I drilled the remaining sight glass/polycarb that was left in the bushing hole out to 3/16" if I remember correctly (I may not-I eyeballed it). I then carefully dremeled down the inside nut on the float switch until it was round and fit into the 1/2" bushing. I put the silicone gasket on and installed the float from the inside. It came out just right. It's very close to the kettle wall but with plenty of room to float freely.

Click image for larger version

Name:	float crop.jpg
Views:	236
Size:	37.5 KB
ID:	101396

Click image for larger version

Name:	HLT full.jpg
Views:	218
Size:	45.0 KB
ID:	101397

This is the 1st float switch I did this with. I accidentally broke the wires off so I replaced it with the same float.

Click image for larger version

Name:	dremeledfloat1.jpg
Views:	220
Size:	24.8 KB
ID:	101401

Click image for larger version

Name:	dremeledfloat2.jpg
Views:	216
Size:	26.8 KB
ID:	101402

I silver soldered the outside SS nut to a piece of 1/2" tubing so I couldn't knock the connection off anymore.
Click image for larger version

Name:	HLT connection.jpg
Views:	316
Size:	19.3 KB
ID:	101398  
jsguitar is offline
 
Reply With Quote
Old 02-15-2013, 08:19 PM   #7
jsguitar
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
jsguitar's Avatar
Recipes 
 
Join Date: May 2011
Location: Overland Park, KS
Posts: 1,120
Liked 103 Times on 81 Posts
Likes Given: 635

Default

I used these dc switchcraft connections. I also used this switch to switch the negative wire going to the SSR from the PID. The way it works is that when I switch up, the hlt float switch makes or breaks the negative dc feed to the ssr. When switched to the middle or down, the pid neg is directly connected to the SSR for using the BK which doesn't have a float switch. Caveat: you have to make sure that you have the switch up when using the HLT if you want to have the float switch protection!

I'm not an electrician or EE so take this for what it's worth. This worked for me but there are other, possibly better ways to do it. There is an old thread around here somewhere where passedpawn drew something like this up for somebody. It was very helpful.

This is my bad drawing. The negative from the PID is branched off into two wires (twisted,soldered, heat shrinked). One wire goes to the float switch and one goes to the toggle switch pin 3. The other wire of the float switch goes to pin 1. The middle pin (2) is connected to the SSR. Pins 4,5, and 6 are not used in this application. (see linked switch, NKK M2024 documentation. Note: I did not do any external connecting of pins as noted in that doc.)

Click image for larger version

Name:	Scan 12.jpg
Views:	208
Size:	21.6 KB
ID:	101448

The switch pics are all upside down as it's installed on the open lid of my
controller.

Click image for larger version

Name:	wiring2.jpg
Views:	207
Size:	38.8 KB
ID:	101413

Click image for larger version

Name:	wiring 3.jpg
Views:	214
Size:	47.7 KB
ID:	101412

Click image for larger version

Name:	side of panel.jpg
Views:	199
Size:	28.5 KB
ID:	101461

Hopefully this makes sense and is helpful. I'm not very savvy with this stuff so I used my ohm meter to check everything to make sure I understood how it all worked. It worked exactly like I hoped this past weekend.
jsguitar is offline
 
Reply With Quote
Old 02-15-2013, 08:23 PM   #8
jsguitar
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
jsguitar's Avatar
Recipes 
 
Join Date: May 2011
Location: Overland Park, KS
Posts: 1,120
Liked 103 Times on 81 Posts
Likes Given: 635

Default

Oh yeah, Auber (no affiliation) just started carrying this float switch here.
jsguitar is offline
 
Reply With Quote
Old 02-17-2013, 04:29 AM   #9
alien
Feedback Score: 1 reviews
Recipes 
 
Join Date: Apr 2012
Location: Philadelphia, PA
Posts: 1,235
Liked 65 Times on 58 Posts
Likes Given: 61

Default

I reckon this is a good safety feature. Costs less than a blown element. Yes I've done it too

Don't like the M10 thread on the float switch though.
alien is offline
 
Reply With Quote
Old 04-21-2013, 02:24 PM   #10
kevink
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2010
Location: PA
Posts: 510
Liked 50 Times on 40 Posts
Likes Given: 7

Default

Has anyone bought one of these who is willing to measure the OD of the tube? I don't like how it mounts, either. I'm thinking we can cut off the hex and threaded part and use a compression fitting if the tube is compatible.


kevink is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Grainger Float Switch? Anyone? tannnick Electric Brewing 11 10-26-2012 01:13 AM
Float switch how to? slouch Brew Stands 8 01-02-2010 06:35 AM
Float switch wiring help BlackTieBrewing Brew Stands 8 11-27-2009 12:22 AM
float switch wiring help seanhagerty Equipment/Sanitation 4 10-13-2008 12:54 AM
The $29 float switch for sparging Monster Mash Brew Stands 1 06-15-2007 12:13 AM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS