differential manometer

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dif·fer·en·tial ma·nom·e·ter

any device that indicates the difference in pressure between two fluids, regardless of any changes in their absolute pressures.
References in periodicals archive ?
Limited Tenders are invited for Differential Manometer As Per Annexure-I.
The HHP886 Series of differential manometers from Omega features a dual display and dual pressure inputs.
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