Manometer accuracy

Discussion in 'Electrical' started by paulmars, Feb 13, 2018.

  1. paulmars


    May 24, 2017
    Likes Received:
    What is a good reasonable priced accurate manometer to measure my barometric damper?

    My furnace should be 0.025 and my flue should be -0.02. Looking at the gauges for sale i see accuracy (read
    inaccuracy) ratings that would make readings in the range that I need almost useless. Exp:

    0.3% of full scale 55.00wc (0.003x55=0.165) Does that mean that a reading of 0.02 could be off by as much as


    +/-0.3% of full scale 83.02 InH2O NKTECH NK-L3 (0.003x83.02=0.249)

    ±1.5% of full scale 4.00wc Dwyer 478A-0 (0.15x4=0.6)

    Am I doing something wrong here?

    paulmars, Feb 13, 2018
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