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Picture of flowmeter Proline Promag 55S for applications with high solids content and high abrasion

Proline Promag 55S
electromagnetic flowmeter

The flowmeter with outstanding abrasion resistance and integrated solids content diagnostics

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  • Measuring principle


  • Product headline

    The flowmeter with outstanding abrasion resistance and integrated solids content diagnostics.
    Superb signal stability due to unique signal processing.
    Ideal for the most demanding applications with high solids content and high abrasion.

  • Sensor features

    Maximum safety – industry-optimized measuring electrodes and linings. Energy‐saving flow measurement – no pressure loss due to cross section constriction. Maintenance‐free – no moving parts.
    Intensified coil system. Large range of liners. Solids content up to 80 % by weight.

  • Transmitter features

    Highest performance – with integrated solids measurement for demanding fluids. Highest safety – integrated electrode cleaning. Automatic recovery of data for servicing.
    4-line backlit display with touch control. Two switch outputs. HART, PROFIBUS PA/DP, FOUNDATION Fieldbus.

  • Nominal diameter range

    DN 15...600

  • Wetted materials

    Liner: Polyurethane, Hard rubber, PFA, PTFE, Natural rubber
    Electrodes: 1.4435/304L, Alloy C-22, Tantalum, Platinum, Duplex 1.4465, Tungsten carbide, Titanum

  • Measured variables

    Volume flow, electrical conductivity, mass flow

  • Max. measurement error

    Volume flow: ±0.5 % o.r.± 1 mm/s (0.04 in/s)
    Option: ±0.2 % o.r. ± 2 mm/s (0.08 in/s)

  • Measuring range

    0.06 dm3/min to 600 m3/h (0.015 gal/min to 2650 gal/min)

  • Max. process pressure

    PN 40, Cl. 300, JIS 20 K

  • Medium temperature range

    0 to +60 °C (+32 to +140 °F), 0 to +80 °C (+32 to +176 °F), –20 to +50 °C (–4 to +122 °F), –20 to +180 °C (–4 to +356 °F), –20 to +150 °C (–4 to +266 °F)

  • Ambient temperature range

    –40 to +60 °C (–40 to +140 °F)

  • Sensor housing material

    Aluminum coated AlSi10Mg, carbon steel with protective varnish

  • Transmitter housing material

    Powder-coated die-cast aluminum

  • Degree of protection

    Standard: IP 67 (Type 4X enclosure) for transmitter and sensor
    Optional: IP 68 (Type 6P enclosure) for remote version of Promag S sensor

  • Display/Operation

    Liquid-crystal display: illuminated, four lines with 16 characters per line
    Onsite operation with three optical sensor keys

  • Outputs

    (active/passive) Pulse-/ Frequency output (active/passive)
    Two status outputs

  • Inputs

    Current input

  • Digital communication


  • Power supply

    AC 20 to 260 V
    DC 20 to 64 V

  • Hazardous area approvals

    ATEX, FM, CSA, UK Ex

  • Product safety

    CE, C-tick, EAC marking

  • Pressure approvals and certificates

    CRN, PED

  • Material certificates

    3.1 material

  • Hygienic approvals and certificates

    Drinking water approval:ACS, KTW/W270, NSF 61, WRAS BS 6920

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