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Thread: Testo gauges.

  1. #1
    Join Date
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    Testo gauges.

    Looking to buy Testo 550 or 557.
    Info isn't clear online the ability of these to read vacuum. Wondering if anyone uses this feature alone to evacuate instead of a stand alone vacuum gauge?

  2. #2
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    Many people use the vacuum gauge in the 557 ( the 550 has no vacuum gauge) and like it. I prefer to use a standalone vacuum gauge far away from the manifold as possible.

  3. #3
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    The reason to by the 557 is increased accuracy over the 550. Although the 557 can read vacuum, you are far ahead to eliminate the manifold from the evacuation process and use large diameter hoses, core tools and a stand alone micron gauge connected with a brass fitting. Hoses leak, and a manifold with 1/4" hoses slows the process even further.

    We sell a lot of Testo 557 and Testo 570 gauges, but we do not sell them nor any micron gauge equipped gauge with the intent of selling an all in one tool. The vacuum gauge was an industry driven feature that was added by several manufacturers that did not have experience with the mechanics of evacuation. I would use it if I did not have anything else, but the times savings with large hoses is so huge, I would not use a manifold for evacuation as an every day tool.
    JLB,

  4. #4
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    Thanks guys.
    On the 557 what is the range on the gauge?

  5. #5
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    725psi on high and low side with a 0.5% accuracy. I think the micron and temp are also 0.5% accurate.

  6. #6
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    Quote Originally Posted by jim bergmann View Post
    The reason to by the 557 is increased accuracy over the 550. Although the 557 can read vacuum, you are far ahead to eliminate the manifold from the evacuation process and use large diameter hoses, core tools and a stand alone micron gauge connected with a brass fitting. Hoses leak, and a manifold with 1/4" hoses slows the process even further.

    We sell a lot of Testo 557 and Testo 570 gauges, but we do not sell them nor any micron gauge equipped gauge with the intent of selling an all in one tool. The vacuum gauge was an industry driven feature that was added by several manufacturers that did not have experience with the mechanics of evacuation. I would use it if I did not have anything else, but the times savings with large hoses is so huge, I would not use a manifold for evacuation as an every day tool.
    JLB,
    I have checked your website and must say a lot of thought and care has been made.
    Very good tips and areas to be concerned with, prices very competative.
    I shall look to contact you for my equipment soon.

  7. #7
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    Quote Originally Posted by Itstony View Post
    JLB,
    I have checked your website and must say a lot of thought and care has been made.
    Very good tips and areas to be concerned with, prices very competative.
    I shall look to contact you for my equipment soon.
    Sent an e-mail to JLB via the but no reply :-(
    Last edited by jpsmith1cm; 08-15-2012 at 09:20 PM. Reason: Removed Email

  8. #8
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    Quote Originally Posted by Itstony View Post
    Sent an e-mail to JLB via the but no reply :-(
    Sorry about that that email goes to a general email box at the office with hundreds and hundreds a day.

    My email addresses in my profile you can contact me directly there.
    Last edited by jpsmith1cm; 08-15-2012 at 09:21 PM. Reason: Removed email
    JLB,

  9. #9
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    Quote Originally Posted by eddiegoodfellar View Post
    725psi on high and low side with a 0.5% accuracy. I think the micron and temp are also 0.5% accurate.
    I don't think the micron function of the testo gauge is 0.5% accurate.
    I believe they list ±500 microns with a 500 micron resolution.
    “If You Can Dodge A Wrench You Can Dodge A Ball”

  10. #10
    Join Date
    Oct 2006
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    26
    Dont waste your time or money one of the worst manifolds i have owned. On my second set and getting ready to send this set back.

  11. #11
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    I was wrong.It is listed in the manual as:
    ±1% fs (±1 digit)

  12. #12
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    That is confusing how they wrote it.
    So is "±1 Digit" ±1 micron? Thats better than a BluVac
    Looks like ±1 digit translates to one tic on their scale which is ±500 microns
    “If You Can Dodge A Wrench You Can Dodge A Ball”

  13. #13
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    i think u are right

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