Our Valued Sponsor
OpinionsConsumer ReviewsGuides and How TosCoffeeGeek ReviewsResourcesForums
Espresso: Espresso Mods and Restorations
Electronic pressure transducer
Don't suffer bad espresso
Package deals on the best machines from Izzo, Quick Mill, VBM, La Marzocco & more.
www.clivecoffee.com
 
Not Logged in: Log In to Postlog in
New Topics updated topics   New Posts new posts   Unanswered Posts new unanswered  
Search Discussion Board search   Discussion Board FAQ faq   Signup sign up  
Discussions > Espresso > Espresso Mods > Electronic...  
view previous topic | view next topic | view all topics
showing page 1 of 2 last page next page
Author Messages
buestad
Senior Member


Joined: 22 Nov 2013
Posts: 13
Location: Norway
Expertise: I love coffee

Espresso: Rancilio Silva
Grinder: Rancilio Rocky
Posted Sat Nov 23, 2013, 2:27am
Subject: Electronic pressure transducer
 

I am thinking about modding my Silvia with an Arduino board,  and one of the inputs I would like to have is brewing pressure. I don't want to make any external mods to my silvia so I want to read off the pressure using my phone through Bluetooth communication, therefore the electronic pressure transducer.

Has anyone ever ever fitted a electronic pressure transducer to a silvia or any other equivalent machine?
back to top
 View Profile Link to this post
jonr
Senior Member


Joined: 25 Jun 2013
Posts: 295
Location: Americas
Expertise: I like coffee
Posted Sun Nov 24, 2013, 7:45am
Subject: Re: Electronic pressure transducer
 

I think ZPM is or was using the Omega PX26-005DV.  Consider measuring flow too.
back to top
 View Profile Link to this post
buestad
Senior Member


Joined: 22 Nov 2013
Posts: 13
Location: Norway
Expertise: I love coffee

Espresso: Rancilio Silva
Grinder: Rancilio Rocky
Posted Mon Nov 25, 2013, 2:00am
Subject: Re: Electronic pressure transducer
 

How to measure flow? isn't the grouphead mounted directly on the boiler?
back to top
 View Profile Link to this post
andys
Senior Member
andys
Joined: 10 May 2003
Posts: 850
Location: NY
Expertise: Just starting

Espresso: Speedster, Londinium 1
Grinder: EK-43,Robur, HG One, M3
Vac Pot: Yama
Drip: various
Roaster: PIDed Popper
Posted Mon Nov 25, 2013, 5:18am
Subject: Re: Electronic pressure transducer
 

buestad Said:

Has anyone ever ever fitted a electronic pressure transducer to a silvia or any other equivalent machine?

Posted November 23, 2013 link

I used an AST 4100 for my Silvia. Nowadays there seem to be plenty of lower cost  alternatives like the Omega that jonr mentioned (although these alternatives are probably a lot less durable than the industrial-type AST).

buestad Said:

How to measure flow? isn't the grouphead mounted directly on the boiler?

Posted November 25, 2013 link

You put the flow sensor between the pump and the boiler.

 
-AndyS
picture page:  http://flickr.com/photos/andy_s/sets/
back to top
 View Profile Visit website Link to this post
jonr
Senior Member


Joined: 25 Jun 2013
Posts: 295
Location: Americas
Expertise: I like coffee
Posted Mon Dec 2, 2013, 3:06pm
Subject: Re: Electronic pressure transducer
 

I just had a $10 digital tire pressure gauge die.  I'm tempted to remove the sensor and try it for espresso.  On the other hand, I think it is flow that matters most.

I wouldn't be surprised if future espresso machines do away with the OPV and just use a flow sensor and pump power control.  Given flow and power being sent to the pump, you can roughly estimate pressure based on the pump curves.
back to top
 View Profile Link to this post
jonr
Senior Member


Joined: 25 Jun 2013
Posts: 295
Location: Americas
Expertise: I like coffee
Posted Thu Dec 5, 2013, 5:02pm
Subject: Re: Electronic pressure transducer
 

Also see this one:

Click Here (www.ebay.com)
back to top
 View Profile Link to this post
buestad
Senior Member


Joined: 22 Nov 2013
Posts: 13
Location: Norway
Expertise: I love coffee

Espresso: Rancilio Silva
Grinder: Rancilio Rocky
Posted Fri Dec 6, 2013, 12:38am
Subject: Re: Electronic pressure transducer
 

Look at the specs:
 Working Temperature: -40+120C;
 Compensation Temperature: -20+80C;

Maybe it will work between the pump and the boiler. I don't know how hot it gets there, but when steaming the boiler goes up to 140-150C. I've been searcing around, and the transducers handling more than 120C is REALLY expencive...

Any suggestions for flow-meters by the way?
back to top
 View Profile Link to this post
GVDub
Senior Member


Joined: 25 Jan 2008
Posts: 849
Location: Los Angeles, CA
Expertise: I live coffee

Espresso: Londinium I, Arrarex...
Grinder: Gaggia MD85, Dienes Mokka,...
Drip: Behmor Brazen, Abid Clever
Roaster: Behmor 1600
Posted Fri Dec 6, 2013, 6:54am
Subject: Re: Electronic pressure transducer
 

Have you looked into the Auber pressure sensor? it's available with and ⅛" fittings, and since one of it's intended uses is in a running internal combiustion engine, it probably can handle the temps.
back to top
 View Profile Link to this post
calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,722
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Fri Dec 6, 2013, 8:22am
Subject: Re: Electronic pressure transducer
 

You can also contact AutomationDirect. I picked up a motor control unit from them, they have good customer service, lots of products, very prompt shipping and great prices on industrial grade equipment. It is not all from China second tier makers either, I do have several Auber controls but the ... quality .... of the parts is not industrial grade, not like the stuff at Automation Direct.
http://www.automationdirect.com/adc/Home/Home
Give them a look anyway, looking is free and you might find something that you like better. YMMV!

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
back to top
 View Profile Visit website Link to this post
jonr
Senior Member


Joined: 25 Jun 2013
Posts: 295
Location: Americas
Expertise: I like coffee
Posted Fri Dec 6, 2013, 10:30am
Subject: Re: Electronic pressure transducer
 

The nice thing about measuring pressure is that you can stick the sensor on the end of a long dedicated tube that puts the sensor well away from the boiler heat.
back to top
 View Profile Link to this post
showing page 1 of 2 last page next page
view previous topic | view next topic | view all topics
Discussions > Espresso > Espresso Mods > Electronic...  
New Topics updated topics   New Posts new posts   Unanswered Posts new unanswered     Search Discussion Board search   Discussion Board FAQ faq   Signup sign up  
Not Logged in: Log In to Postlog in
Discussions Quick Jump:
Symbols: New Posts= New Posts since your last visit      No New Posts= No New Posts since last visit     Go to most recent post= Newest post
Forum Rules:
No profanity, illegal acts or personal attacks will be tolerated in these discussion boards.
No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum.
No SEO style postings will be tolerated. SEO related posts will result in immediate ban from CoffeeGeek.
No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum.
Who Can Read The Forum? Anyone can read posts in these discussion boards.
Who Can Post New Topics? Any registered CoffeeGeek member can post new topics.
Who Can Post Replies? Any registered CoffeeGeek member can post replies.
Can Photos be posted? Anyone can post photos in their new topics or replies.
Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts.
Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.
Support Coffee Kids
Coffee Kids is a non profit charity working with farming communities around the world. Donate today!
www.coffeekids.org
Home | Opinions | Consumer Reviews | Guides & How Tos | CoffeeGeek Reviews | Resources | Forums | Contact Us
CoffeeGeek.com, CoffeeGeek, and Coffee Geek, along with all associated content & images are copyright ©2000-2014 by Mark Prince, all rights reserved, unless otherwise indicated. Content, code, and images may not be reused without permission. Usage of this website signifies agreement with our Terms and Conditions. (0.244004964828)
Privacy Policy | Copyright Info | Terms and Conditions | CoffeeGeek Advertisers | RSS | Find us on Google+