Differential Pressure Transmitter

    Categories Liquid & Gas Analysis, pH Transmitter & Controller

    BENEFITS The 988 series are robust differential pressures transmitters for liquid and gaseous, non-flammable, non-aggresive media, designed to measure differential pressure as well as under- and overpressure. A ceramic AL2O3 measuring cell with Parylene C coating and internal PTC temperature compensation delivers stable, long-term accuracy in demanding thermal and mechanical environments. Outputs include 4-20mA (2-wire/3-wire) and 0-10V (3-wire) for seamless integreation into PLCs, BMS, and process controllers.
    BENEFITS
    The 988 series are robust differential pressures transmitters for liquid and gaseous, non-flammable, non-aggresive media, designed to measure differential pressure as well as under- and overpressure. A ceramic AL2O3 measuring cell with Parylene C coating and internal PTC temperature compensation delivers stable, long-term accuracy in demanding thermal and mechanical environments. Outputs include 4-20mA (2-wire/3-wire) and 0-10V (3-wire) for seamless integreation into PLCs, BMS, and process controllers. 
     

    FEATURES

    Rugged sensing core — Ceramic cell with Parylene C resists wear and delivers low hysteresis, high repeatability, and minimal drift for dependable measurements over time.

    Wide electrical compatibility — 2‑wire 4–20 mA for simple loop retrofits; 3‑wire 0–10 V/4–20 mA for multi‑signal control and monitoring, reducing gateway complexity.

    Thermal resilience — Medium temperatures from –20…+105 °C (short‑term 120 °C) and ambient –20…+85 °C enable hot/cold loop applications without extra protection. 

    Installation flexibility — Choice of brass or stainless pressure chambers; DIN Form A or M12 connectors; accessories for L/S/U‑mounting simplify panel or pipework installs. 

    Industry integrations — Use in building automation, sanitary/industrial measurement, hydronic loops (supply/return), filter/fan/compressor monitoring, and cooling/heating circuits is already validated across your internal collateral

    • Description
    • Attachment
    Pressure range

    For an optimal adaptation to the application, different pressure ranges are available. The measurement is carried out by a ceramic pressure measuring cell, temperature-compensated via internal PTC.

    Output signal
    In the 3-wire version there is an output signal of 0 … 10 V, or 4 … 20 mA available. For the 2-wire version the transmitter provides an output signal of 4 … 20 mA.

    Electrical connection
    The electrical connection of the transmitter is optionally available with a 4-pin standardized device plug according to DIN EN 175301 Form A, or with a 4-pin M12 flange plug, A-coded, according to DIN EN 61079.

    Data Sheet

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    982_UL, 984_UL, 985_UL, 988_UL - ETL Authorization to Mark UL61010 (en)

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    981, 982, 984, 985, 988, 990 - CE EU Konformitätserklärung_ Declaration of Conformity (de,en)

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