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Thread: differential pressure tester

  1. #1

    Join Date
    Apr 2020
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    1

    differential pressure tester

    I am planning on buying a differential pressure tester with master orifice, to check my compression on my cylinders. There are couple out there but I don’t know which one is a good one that will last. Could you give me your recommendations please?

  2. #2
    Joda's Avatar
    Join Date
    Jul 2011
    Location
    Oshkosh, Wisconsin, United States
    Posts
    226
    I have both an Eastern Technologies and an ATS compression tester, and they both work well. I see no practical difference between the two.
    Cheers!

    Joe

  3. #3
    DaleB's Avatar
    Join Date
    Sep 2015
    Location
    KMLE
    Posts
    654
    I bought the ATS. THere's not much to go wrong with these. I looked at a bunch of the Chinese-made cheap ones available on Amazon... but not a single one of them says what size the orifice is. It makes a difference. I asked several vendors about it. Most simply didn't answer; one said it was a "trade secret", which I thought was the silliest way possible of saying they had no idea because it's just some generic thing they sourced from Guangzhou or wherever. Decided to spend the extra bucks on one that is at least sold by a vendor who has some clue what it actually is.
    Measure twice, cut once...
    scratch head, shrug, shim to fit.

    Flying an RV-12. I am building a Fisher Celebrity, slowly.

  4. #4

    Join Date
    Aug 2013
    Location
    Gwinn, Michigan
    Posts
    243
    The following link will tell you all you need to know about the test and the orifice used. https://www.aircraftspruce.com/catal...cebulletin.pdf

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