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  1. #1

    Best Manometer - Opinions?

    Hi All,

    I'm looking for a digital differential pressure manometer. Any suggestions on good ones and ones to avoid?

    Thanks.

  2. #2
    Join Date
    Jul 2005
    Posts
    5,571
    Quote Originally Posted by speckledflounder View Post
    Hi All,

    I'm looking for a digital differential pressure manometer. Any suggestions on good ones and ones to avoid?

    Thanks.
    testo 510. It's a good one.


  3. #3
    Join Date
    Jan 2008
    Location
    West Valley City, UT
    Posts
    157
    I've been using the Fieldpiece one, seems to work well enough. I do have to 'zero' it out as it warms up or cools down if I want it to be as accurate as possible.

  4. #4
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,128
    Quote Originally Posted by hvacrmedic View Post
    testo 510. It's a good one.

    That's a good one. Just be careful with it, they can't take rough handling. I like mine.

  5. #5
    Join Date
    May 2007
    Location
    Dry as a bone Tucson
    Posts
    4,344

    Rugged and tough

    I like my tools to be like me................rugged.

    Some Talk, Some Do
    "keeping condensing pressures low and evaporator pressures high"
    "Some customers are more interested in comfort than energy savings"
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  6. #6
    Join Date
    Oct 2008
    Location
    Nashville ,TN
    Posts
    289
    Quote Originally Posted by hvacrmedic View Post
    testo 510. It's a good one.


  7. #7
    Join Date
    Jul 2005
    Location
    Tulsa
    Posts
    286
    Dwyer makes good Manometers


  8. #8
    Join Date
    Mar 2009
    Location
    Tracy,California
    Posts
    66
    I like the testo 510 had mine for a little over a year and works great even reads pascal.

  9. #9
    Join Date
    Mar 2006
    Posts
    1,032
    ive got the supco dual port mano. sold at united.. Works good for me, but i dont use it much, maybe 4 times in the last 3 months
    You can't kiss death without it kissing you back. Death is a passionate kisser.


  10. #10
    Join Date
    Jun 2012
    Location
    CT
    Posts
    61
    i have a uei single port. bought it for gas service and got couple of test probes to use it for static readings too

  11. #11
    Join Date
    Aug 2004
    Location
    S.E. Pa
    Posts
    6,195

    Cool working under pressure

    Test 510 or Dwyer 477 for my front line units.

    All those aneroid YJ-type don't hold calibration. Even a Dwyer Magnahelic can get to the point it won't calibrate and it has a screw adj. The UEI is rugged and cheap and it works well right up until its death.

    I find the manometer in my combustion analyzer unreliable (Bach. FRP125)

    I always have a water manometer for incident investigations since they are lab accurate and I check my digitals against it periodically on both the high and low end.

    For depressurization testing, I use a Energy Conservatory digital micromanometer that reads in tenths of one Pascal with time averaging and get it calibrated annually.

    For draft testing, I put my old Backarach black box on the shelf and use the Dwyer 460, which is cheap, light, compact and accurate.

    I use Dwyer tips for static pressure and a telescoping pitot tube. For testing pressure switches I have a variety of barbed hose fittings and adapters.

  12. #12
    Join Date
    Jan 2007
    Location
    Mn the state where absolutey nothing is allowed
    Posts
    1,351

    " mine works fine""

    for all of you that say your manometer is"fine" i have to ask, how do you know??

    i ask a lot of techs this about manometers, thermometers, homemade static tips etc.....

    most respond " because it works".

    i only bring this up so people know how important it is to regularly calibrate your test equipment.

    water u-tube, most accurate and reliable manometer out there ( that is for a certain pressure range of course)

    an ice cube can be colder than 32'. you need an ice slury with no extra water to be as accurate as possible.


    cheers
    my boss thinks its possible to repeal the laws of physics

  13. #13
    Join Date
    Jul 2005
    Location
    Tulsa
    Posts
    286
    worth reading...
    --------------
    Measurement of Pressure with the Manometer

    Pressure is defined as a force per unit area - and the most accurate way to measure low air pressure is to balance a column of liquid of known weight against it and measure the height of the liquid column so balanced. The units of measure commonly used are inches of mercury (in. Hg), using mercury as the fluid and inches of water (in. w.c.), using water or oil as the fluid.

    Fig. 2-1. In its simplest form the manometer is a U-tube about half filled with liquid. With both ends of the tube open, the liquid is at the same height in each leg.

    http://www.dwyer-inst.com/Products/M...troduction.cfm




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