Get your HBT Growlers, Shirts and Membership before the Rush!


Home Brew Forums > Home Brewing Beer > Automated Brewing Forum > liquid sensor - I've been thinking.........
Reply
 
LinkBack Thread Tools
Old 09-01-2013, 03:47 PM   #1
aamcle
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2013
Posts: 90
Liked 1 Times on 1 Posts

Default

If I recirculate through a grain bed, in at the top, out at the bottom, through the pump and back in at the top a simple closed loop.

If the flow through the bed was too slow then the pump would suck all the wort from under the grain be and could be damaged, I would like something that would switch the pump off if this happened rather than have to stand there adjusting flow rates. :-)

What would I need to do or what sensor could I use to prevent the pump running dry?


Many Thanks. Aamcle

__________________
aamcle is offline
 
Reply With Quote Quick reply to this message
Old 09-05-2013, 10:40 PM   #2
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

You could DIY something perhaps by taping foil sheets either side of a silicone tube leading to the pump as a capacitative liquid sensor. Crappy instructable demonstrates -->

http://www.instructables.com/id/Buil...Liquid-Sensor/

alien is offline
 
Reply With Quote Quick reply to this message
Old 09-06-2013, 06:00 AM   #3
atoughram
Feedback Score: 0 reviews
Recipes 
 
Join Date: May 2013
Location: Puyallup, Washington
Posts: 1,275
Liked 138 Times on 122 Posts
Likes Given: 276

Default

Arduino and a flow sensor??? You could have the Arduino switch the pump on and off depending on the flow.

http://www.ebay.com/itm/1-30L-min-2-...item2580e6824f

__________________
Clover Creek Brewery, Puyallup WA
Planning - Lunch Swamp Saison
Fermenters - Snagtooth Pale Ale OG 1.061
On tap
Mulholland Hard Cider OG 1.084
Carbon River Hefe OG 1.046
atoughram is offline
 
Reply With Quote Quick reply to this message
Old 09-06-2013, 07:55 AM   #4
aamcle
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2013
Posts: 90
Liked 1 Times on 1 Posts

Default

I've spent some time thinking about this and I can do it with a "jam jar" and a float switch, not high tech but easy to do and should be reliable.

I'm starting to get the bits for the build together:-)


Thanks for your help. Aamcle

__________________
aamcle is offline
 
Reply With Quote Quick reply to this message
Old 09-11-2013, 05:19 PM   #5
atoughram
Feedback Score: 0 reviews
Recipes 
 
Join Date: May 2013
Location: Puyallup, Washington
Posts: 1,275
Liked 138 Times on 122 Posts
Likes Given: 276

Default

I've got one of these

http://www.ebay.com/itm/NEW-Ultra-So...item3f13320208

I should try it for use on liquid levels - we've used something similar at work for liquid levels.

__________________
Clover Creek Brewery, Puyallup WA
Planning - Lunch Swamp Saison
Fermenters - Snagtooth Pale Ale OG 1.061
On tap
Mulholland Hard Cider OG 1.084
Carbon River Hefe OG 1.046
atoughram is offline
 
Reply With Quote Quick reply to this message
Old 09-11-2013, 06:03 PM   #6
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

Quote:
Originally Posted by atoughram View Post
I've got one of these

http://www.ebay.com/itm/NEW-Ultra-So...item3f13320208

I should try it for use on liquid levels - we've used something similar at work for liquid levels.
The issue is whether it will work for boiling/foaming liquids.
__________________
Magic Smoke brewhouse and grill

Arduino PID controller - Automatic Smoker - Cooler MLT - Counterflow Chiller - SSR demo - PWM timer - Folding Brew Table
alien is offline
 
Reply With Quote Quick reply to this message
Old 09-12-2013, 01:00 AM   #7
jpalarchio
Feedback Score: 1 reviews
Recipes 
 
Join Date: Jan 2009
Location: Holly, MI
Posts: 562
Liked 50 Times on 41 Posts
Likes Given: 11

Default

Quote:
Originally Posted by atoughram
Arduino and a flow sensor??? You could have the Arduino switch the pump on and off depending on the flow.

http://www.ebay.com/itm/1-30L-min-2-...item2580e6824f
I haven't had much luck with flow sensors and Arduinos, it may depend on what else you're doing on the Arduino but the interrupts are limited and I had concerns on the impact to the rest of my code. For what I was measuring (RO system efficiency), it didn't seem incredibly accurate over long periods of time.

Also, with those flow sensors (I have the Swissflow ones), there is a little propeller in there that looks like it would get destroyed by any grain husk or hop leaf it might encounter.

I would consider a method similar to the Blichmann Autosparge or the MoreBeer sparse thing. Those basically keep a certain level of liquid on top of the grain at all times.
__________________
jpalarchio is offline
 
Reply With Quote Quick reply to this message
Old 09-13-2013, 08:14 PM   #8
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

Quote:
Originally Posted by jpalarchio View Post
I would consider a method similar to the Blichmann Autosparge or the MoreBeer sparse thing. Those basically keep a certain level of liquid on top of the grain at all times.
This sounds like a pretty good solution.
__________________
Magic Smoke brewhouse and grill

Arduino PID controller - Automatic Smoker - Cooler MLT - Counterflow Chiller - SSR demo - PWM timer - Folding Brew Table
alien is offline
 
Reply With Quote Quick reply to this message
Old 09-14-2013, 01:08 PM   #9
grathan
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2010
Location: Albany, NY
Posts: 2,069
Liked 131 Times on 100 Posts
Likes Given: 80

Default

You could put a adjustable height thermocouple submersed, assuming the temp would change when no longer submersed.

__________________
grathan is offline
 
Reply With Quote Quick reply to this message
Old 09-15-2013, 03:18 AM   #10
atoughram
Feedback Score: 0 reviews
Recipes 
 
Join Date: May 2013
Location: Puyallup, Washington
Posts: 1,275
Liked 138 Times on 122 Posts
Likes Given: 276

Default

Quote:
Originally Posted by grathan View Post
You could put a adjustable height thermocouple submersed, assuming the temp would change when no longer submersed.
Yes, that might work, also a adjustable current probe setup would work - I've worked on tanks that had probes with small voltage on them - when the liquid touched them, they sensed the level.
__________________
Clover Creek Brewery, Puyallup WA
Planning - Lunch Swamp Saison
Fermenters - Snagtooth Pale Ale OG 1.061
On tap
Mulholland Hard Cider OG 1.084
Carbon River Hefe OG 1.046
atoughram is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wisconsin WTS: Auber Liquid tight RTD sensor, 4 in, 1/2 NPT Thread blaster_54738 For Sale 1 03-27-2013 02:58 AM
keg ultrasonic liquid level sensor. techbrewie Kegerators and Keezers 28 03-09-2013 11:20 PM
Liquid Sensor kickrjason Brew Stands 31 01-13-2012 04:10 AM
Explosion Proof Liquid MTS RTD Temperature Level sensor michaeltrego General Beer Discussion 0 05-17-2011 03:06 PM
popular liquid level sensor max4260 Brew Stands 3 07-23-2010 04:51 AM



Newest Threads

LATEST SPONSOR DEALS