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Espresso: Espresso Machines
Cheap pressure gauge!

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Discussions > Espresso > Machines > Cheap pressure...

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Riprazor
Senior Member

Joined: 17 Jan 2004
Posts: 138
Location: North Oaks, MN
Expertise: I live coffee

Espresso: Isomac Tea, LaSpaziale S1,...
Grinder: Mazzer Mini x 2
Drip: only when wet
Roaster: I-Roast

Posted Thu Dec 16, 2004, 6:58am
Subject: Re: Cheap pressure gauge!

Srock Said:

Very cool - doe you think a tire pressure guage is precise enough at low pressures to give an accurate result? My guess they are calibrated to be their best at 20-30lbs pressure. I may look around to see if there are cheap low pressure guages avail. Your idea is teriffic !

Steve

Posted December 16, 2004 link

1'st compliments on a great idea. To your point, another source of pressure guages is your local pool/spa supply store. For $6 I picked up a guage that goes from 0 - 60 PSI which I use to regulate the water pressure going to my La Spaziale. No need to convert from BAR to PSI and more precise at lower pressures.

Regards,
Barry

brianbonedoc
Senior Member

Joined: 5 Jan 2004
Posts: 17
Location: Los Angeles
Expertise: I love coffee

Posted Thu Dec 23, 2004, 12:19pm Subject: Re: Cheap pressure gauge!

Great idea Murray! Here is my rendition Bottom of cycle = just when light goes ON! The gauge reads 12psi = 0.83 Bar (Click for larger image)

brianbonedoc
Senior Member

Joined: 5 Jan 2004
Posts: 17
Location: Los Angeles
Expertise: I love coffee

Posted Thu Dec 23, 2004, 12:22pm Subject: Re: Cheap pressure gauge!

And here is the Top of the cycle. Gauge reads - 15.5 psi = 1.06 Bar My deadband is then 15.5-12 = 3.5 psi = 0.24 Bar This is after adjusting my pstat. When I first started the Top of the cycle was at 19-20 psi (1.34 bar) = which is probably a little high (hot) So i turned my PSTAT CLOCKWISE to decrease the pressure. Thanks for all the great posts. Now off to try out my new settings! (Click for larger image)

gourmetguy
Senior Member

Joined: 10 Dec 2002
Posts: 111
Location: Atlanta
Expertise: I live coffee

Espresso: All kinds of stuff
Grinder: Various in my day
Drip: You name it I've had it
Roaster: just an iRoast

Posted Thu Dec 23, 2004, 9:34pm
Subject: Re: Cheap pressure gauge!

gajetjunkie Said:

round tire pressure gauge

Posted August 11, 2004 link

Best idea I've seen here in a while. Here's my question... tire guages, don't they require a needle to depress their valve to allow a reading, i.e., like what's found on a tire valve? Or does the steam pressure depress their valve by virtue of force? I have a Marcuzzi en route and am most intrigued!

KittJ
Senior Member

Joined: 19 Jul 2004
Posts: 324
Location: Chappaquiddick Island

Espresso: PID Expobar Brewtus IIIR;
Grinder: Mazzer: Mini & SJ
Drip: Why??

Posted Fri Dec 24, 2004, 5:06am Subject: Re: Cheap pressure gauge!

Hey Steve .... Please post back here with your findings. Kitt

mbonus
Senior Member

Joined: 4 Nov 2004
Posts: 56
Location: Florida
Expertise: I like coffee

Espresso: Expobar Pulsar
Grinder: Cunil Tranquillo

Posted Fri Dec 24, 2004, 8:11am
Subject: Re: Cheap pressure gauge!

gourmetguy Said:

Posted December 23, 2004 link

While I have not yet built a "cheap pressure gauge", but I thought the same thing. I happen to have a round tire gauge and checked it out. The piller in the center is actually fixed and depresses the needle-spring in the tire valve.

brianbonedoc
Senior Member

Joined: 5 Jan 2004
Posts: 17
Location: Los Angeles
Expertise: I love coffee

Posted Fri Dec 24, 2004, 12:00pm Subject: Re: Cheap pressure gauge!

The tire gauge I used was $6.99 at Kragen. It is pretty nice/metal case felt sturdy. I was able to unscrew (by hand) part of the stem that attaches to the needle valve on the tire so there is a clear unobstructed path from the outside world to the gauge. I assume most decent gauges allow you to do this. -B

Mickael_esp
Senior Member

Joined: 20 Nov 2004
Posts: 30
Location: Portland OR
Expertise: Professional

Espresso: LaMarzocco FB70 2grp
Grinder: Mazzer Super Jolly Timer
Vac Pot: what??
Drip: Aroma
Roaster: So many good ones! Cafe'...

Posted Sat Dec 25, 2004, 8:12am Subject: Re: Cheap pressure gauge!

Very nice. I spent thousands to get portafilter-gauges for all the machines I work on! Machine guages go bad quite often. Its good to check them.

Mikey

Srock
Senior Member

Joined: 15 Nov 2004
Posts: 87
Location: Boston
Expertise: I love coffee

Espresso: Expobar Pulser
Grinder: Rocky
Drip: Starbucks Thermal Pots

Posted Sat Dec 25, 2004, 11:38am Subject: Re: Cheap pressure gauge!

To those who might be interested - I'm going to give this a try Click Here (cgi.ebay.com) Steve

mike01
Senior Member

Joined: 21 Jan 2004
Posts: 372
Location: SE Michigan
Expertise: I love coffee

Espresso: Izzo Alex
Grinder: Mazzer SJ, Virtuoso
Vac Pot: Yama Stovetop
Drip: Bunn HG, Clever Dripper
Roaster: Hottop

Posted Sat Dec 25, 2004, 7:35pm Subject: Re: Cheap pressure gauge!

Walmart sells a round brass tire pressure gauge that works quite well. If I remember right, I paid about 6 or 7 dollars for it.

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