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COIN® Back-to-Back Wedge (Model NN) Flow Meter

The Preso® COIN® Back-to-Back wedge flow meter accommodates most flows, even the most abrasive. This compact DP flow meter has taps built into the flanges to read the instrument taps. This type of wedge meter is effective with clean fluids, gas and steam applications. It stands alone in its ability to maintain the necessary square root relationship between flow rate and differential pressure for almost any type of flow.

This product does not have the CE marking.

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  • Size
    12...152 mm
    1/2...6 in.
  • Temperature Range
    Max. 426°C
    Max. 800°F
  • Pressure Range
    Dependent on flange rating
    Dependent on flange rating
  • Accuracy
    (uncalibrated) ±3% (calibrated) ±0.5%
    (uncalibrated) ±3% (calibrated) ±0.5%
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Rugged construction, practical design, and a simple principle of operation.

Well suited for measuring clean fluids, gas and steam applications.

  • Reynolds number measurement down to 300
  • High viscosity measurement to 3000 and higher
  • Resists wear, no moving parts
  • Bi-Directional flow measurement
  • Narrow face-to-face affords lowest installed cost low pressure losses
  • Resists wear, maintenance free (no moving parts)


Product Specifications

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  • Pipe Size
    12...152 mm
    1/2...6 in.
  • Pressure Range
    Dependent on flange rating
    Dependent on flange rating
  • Temperature Range
    Up to 426° C
    Up to 800° F
  • Accuracy
    ±3% uncalibrated; up to 0.5% calibrated
    ±3% uncalibrated; up to 0.5% calibrated
  • Repeatability
    ±0.2%
    ±0.2%
  • Turndown Ratio
    10:1
    10:1

Market Applications

  • Oil & Gas

    In the oil and gas industry, the flow of liquids and gases must be measured during every phase of exploration, production and transportation. These applications demand the highest oil and gas meter accuracy and reliability, as well as long-term stability and a low cost-of-ownership. Badger Meter offers one of the broadest product portfolios for use in upstream operations that span offshore to onshore activities, including well testing, enhanced oil recovery, fractionation, completion and separation to recover and prepare crude oil and natural gas.

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  • Process & General Industry

    To succeed in a competitive marketplace, manufacturers must deliver the right product on time, every time, as well as capitalize on opportunities for new products, while maximizing uptime and reducing production costs. These manufacturing and processing industries worldwide depend on precise measurement and control technology flow meters. Badger Meter flow meters produce consistently reliable performance to ensure proper blending, custody transfer and signal transmission as well as compliance with international industry standard requirements. Exceptionally durable flow meters and control products help keep production up and running.

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  • Refining, Chemical & Petrochemical

    As a worldwide leader in flow metering technologies for over 110 years, Badger Meter offers one of the broadest product portfolios for the chemical and petrochemical processing industry. From differential pressure and Coriolis flow meters to advanced control valves, our solutions help you measure what matters and improve the efficiency and reliability of your operations. Badger Meter has the proven tools and expertise to help you manage your critical resources.

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Product Documentation

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Manuals & Guides Flow Meter COIN® Preso {{moreContent}} {{seeAllLabel}} | English
Product Data Sheets Preso® COIN® Segmented Wedge Back to Back Flow Meter Preso {{moreContent}} {{seeAllLabel}} | English
Application Data Sheets Preso® Applications Preso {{moreContent}} {{seeAllLabel}} | English

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Software & Firmware

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Preso PresoCalc Setup Tool Software | Version v5.37.23.0 | Updated August 19, 2020 | 33.23 MB See release notes
Preso PresoCalc Setup Tool Software | Version v5.37.23.0 | Updated August 19, 2020 | 33.23 MB See release notes

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