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Differential Pressure

Differential pressure transmitters are used to measure the flow rate of liquid, gas or steam that have non-variable pressures and temperatures. These type of transmitters compare two pressures and transmit the difference to a control unit.

Featured Solutions

  • EJA110E

    The EJA110E is a_standard traditional-mount differential pressure transmitter and is part of the most recent evolution of the DPharp family, the EJA-E series. It_features a single crystal silicon resonant sensor and is suitable to measure liquid, gas, or steam flow as well as liquid level, density and pressure. EJA110E outputs a 4 to 20 mA DC signal corresponding to the measured differential pressure. Its accurate and stable sensor can also measure the static pressure which can be shown on the integral indicator or remotely monitored via BRAIN or HART communications.

    Download the EJA110E brochure here.

    To learn more about Differential pressure transmitters offered at BBP, click here.

     

    DOWNLOAD BROCHURE
  • EJA118E

    The EJA118E is a differential pressure transmitter with remote diaphragm seals and is part of the most recent evolution of the DPharp family, the EJA-E series. They can be used to measure liquid, gas, or steam flow, as well as liquid level, density, and pressure. EJA118E outputs a 4 to 20 mA DC signal corresponding to the measured differential pressure. Its highly accurate and stable sensor can also measure the static pressure which can be shown on the integral indicator or remotely monitored via BRAIN or HART communications. EJA118E features include ± 0.2% Accuracy, 200 ms Response Time, Exida and TUV SIL2 / SIL3 Certified, Local Parameter Setting (LPS), 10-segment Signal Characterizer and Active Capillary Fill Fluid Density Compensation.

    Diaphragm seals are used to prevent process medium form entering directly into the pressure-sensing assembly of the differential pressure transmitter, they are connected to the transmitter using capillaries filled with fill fluid.

    FOUNDATION Fieldbus, PROFIBUS PA and 1 to 5 V DC with HART (Low Power) protocol types are also available. EJA-E series models in their standard configuration, with the exception of the Fieldbus, PROFIBUS and Low Power types, are certified as complying with SIL 2 for safety requirement.

    PERFORMANCE SPECIFICATIONS

    Zero-based calibrated span, linear output, wetted parts material code SW for 3-inch flange flush type, fill fluid code B, and capillary length of 5 m. For Fieldbus and PROFIBUS communication types, use caribrated range instead of span in the following specifications.

    Specification Conformance:  EJA-E series ensures specification conformance to at least ±3σ.

    Static Pressure Effects per 0.69 MPa (100 psi) Change:
    -Span Effects:
    M and H capsules
    ±0.02% of span
    -Effect on Zero:
    M and H capsules
    ±0.014% of URL

    Power Supply Effects(Output signal code D and J):
    ±0.005 % per Volt (from 21.6 to 32 V DC, 350Ω)

    Response Time (Differential pressure):
    M and H capsule: 200 ms (approximate value at normal temperature)
    When software damping is set to zero and including dead time of 45 ms (nominal)

    Static Pressure Signal Range and Accuracy (For monitoring via communication or on indicator. Includes terminal-based linearity, hysteresis, and repeatability):
    Range:
    Upper Range Value and Lower Range Value of the statice pressure can be set in the range between 0 and Maximum Working Pressure (MWP*). The upper range value must be greater than the lower range value. Minimum setting span is 0.5 MPa (73 psi).
    * : Maximum Working Pressure (MWP) is within flange rating pressure.

    Accuracy
    Absolute Pressure:
    1 MPa or higher: ±0.5% of span
    Less than 1 MPa: ±0.5%×(1 MPa/span) of span
    Gauge Pressure Reference:
    Gauge pressure reference is 1013 hPa (1 atm)
    Note: Gauge pressure variable is based on the above fixed reference and thus subject to be affected by the change of atomospheric pressure.

    Learn more about pressure products available from BBP.

    DOWNLOAD BROCHURE
  • EJA130E

    The EJA130E is a traditional mount, high static differential pressure transmitter and is part of the most recent evolution of the DPharp family, the EJA-E series. It features a single crystal silicon resonant sensor and is suitable to measure liquid, gas, or steam flow as well as liquid level, density and pressure. EJA130E outputs a 4 to 20 mA DC signal corresponding to the measured differential pressure. Its accurate and stable sensor can also measure the static pressure which can be shown on the integral indicator or remotely monitored via BRAIN or HART communications.

    The EJA130E is a differential pressure transmitter designed to work in a high static pressure enviroment.

    EJA130E features include:

    • ± 0.055% Accuracy
    • ± 0.1% Stability per 10 years
    • 150 ms Response Time
    • 4,500 psi MWP
    • Exida and TUV SIL 2/3 Certified
    • Local Parameter Setting (LPS)

    Digital Performance

    Yokogawa’s DPharp digital sensor offers twice the performance and stability of the competitor’s analog sensors. The DPharp uses the latest in IC Chip-style design and manufacturing technology. Analog sensors are based on older design technology. Although analog sensors are good, the modern DPharp sensor out performs them. A Yokogawa transmitter with DPharp digital sensor will give you the consistentreliableaccurate measurement you need.

    Accuracy Under All Operating Conditions

    Yokogawa’s DPharp sensor has the ability to measure the differential pressure (DP), static pressure (SP), and sensor temperature from a single sensor. Giving these three pieces of process data, Yokogawa’s transmitter can compensate the DP measurement for Temperature Effect and Static Pressure Effect in real time. This is referred to as Dynamic Compensation and improves the DP measurement accuracy.

    Competitor’s analog sensors can only measure DP and Sensor temperature. So, theirs can compensate for temperature Effect; but, since the SP measurement is missing, it cannot compensate for Static Pressure Effects.

    Stability Under All Operating Conditions

    Digital DPharp sensor provides stable measurement in all operation conditions.
    To some degree, all pressure sensors on the market provide stable measurement with variations in temperature and static pressure. But what happens when the sensor is over-pressured (pressure > sensor Upper Range Limit (URL)) – like occurs when a manifold is incorrectly sequenced during start-up or shutdown? Or a process upset? Analog sensors are actually damaged during these events requiring the transmitter to be recalibrated to return to accurate operation or even replaced. Yokogawa’s transmitters can withstand large overpressure events. (*See the table below.) Once it returns to normal operating pressure (pressure < URL of the sensor), the transmitter will return to operation within the defined accuracy and stability specifications – no need to recalibrate. Basically, the Yokogawa DPharp sensor has a larger operational envelope compared to an analog sensor.

    Signal Characterization

    Signal characterization is a versatile function available on all Yokogawa pressure transmitters. The function is used to compensate the analog 4 to 20 mA output signal for non-linear applications. Such applications include tank strapping or flow measurements; but, it can be used in any application where the relationship between the pressure input and the desired output signal are known. This feature can use up to 10-points.

    To learn about other Differential pressure transmitters available at BBP, click here.

    DOWNLOAD BROCHURE
  • EJX110A

    The EJX110A is a_traditional-mount differential pressure transmitter and_is part of the_EJX-A series. It_features a single crystal silicon resonant sensor and is suitable to measure liquid, gas, or steam flow as well as liquid level, density and pressure. EJX110A outputs a 4 to 20 mA DC signal corresponding to the measured differential pressure. Its highly accurate and stable sensor can also measure the static pressure which can be shown on the integral indicator or remotely monitored via BRAIN or HART communications.

    EJX-A series models in their standard configuration, with the exception of the Fieldbus and PROFIBUS types, are certified as complying with SIL 2 safety requirements.

    • ± 0.04% Accuracy (0.025% Accuracy option available)
    • ± 0.1% per 15 years Stability
    • 90 ms Response Time
    • 3,600 psi MWP
    • Exida and TUV SIL2 / SIL3 Certified
    • Local Parameter Setting (LPS)

    Enhanced Product Quality: The EJX110A with DPharp digital sensor offers the performance needed to run your operations at peak performance. This ensures on-spec product, reduced waste, and improved yield, helping you increase profitability.

    Digital Performance

    Other pressure sensor technologies require an analog to digital conversion before the signal can be processed, introducing additional errors. In Yokogawa’s pressure transmitters, the DPharp sensor directly outputs a digital signal, eliminating the need for analog to digital conversion and improving performance.

    Accuracy Under All Operating Conditions

    Fluctuations in static pressure and temperature cause errors in differential pressure measurement. Analog sensors can only measure DP and sensor temperature and therefore can only compensate for temperature effect.

    Yokogawa’s DPharp digital sensor measures the differential pressure (DP), static pressure (SP), and sensor temperature from a single sensor. Given these three pieces of process data, our differential pressure transmitters compensate the DP measurement for temperature effect and static pressure effect in real time. This compensation is referred to as Dynamic Compensation and improves DP measurement accuracy.

    Stability under all operating conditions

    Overpressure events such as incorrect sequencing of a manifold during start-up or shutdown and process upsets can damage analog sensors, requiring the transmitter to be recalibrated – or even replaced – in order to return it to normal operations.

    The simple, robust design of Yokogawa’s DPharp pressure sensor makes it less susceptible to overpressure events. A mechanical system within the transmitter provides additional overpressure protection by equalizing the excessive pressure before it reaches the sensor. Once it returns to normal operating pressure, the transmitter returns to operation within the defined accuracy and stability specifications with no need for recalibration. The Yokogawa DPharp sensor has a more significant operational envelope compared to an analog sensor, allowing you to run your control loop at your desired set-point regardless of process conditions.

    Reduced TCO: The EJX110A reduces total cost of ownership by having safety as standard, extending calibration intervals, and giving users the option to measure both differential and static pressure with one transmitter.

    Extended Calibration Check Intervals

    Yokogawa EJX-A series pressure transmitters have the long-term stability of ±0.1% per 15 years under all operational conditions, reducing calibration frequencies. As you gain experience with these transmitters, the interval between calibration checks is extended. Long-term this can help reduce your maintenance cost by up to 34%. Spend your time where it is needed.

    Increased Plant Availability: The proven DPharp technology of the EJX110A increases plant availability with its advanced diagnostics, overpressure protection, and quicker resolution of maintenance issues through multiple communication options. Verified by independent third parties around the world, our transmitter provides superior reliability and performance.

    To learn about other Differential pressure transmitters offered at BBP, click here.

    DOWNLOAD BROCHURE
  • EJX118A

    The EJX118A is a_differential pressure transmitter with remote diaphragm seals and_is part of_the EJX-A series._They_can be used to measure liquid, gas, or steam flow, as well as liquid level, density, and pressure. EJX118A outputs a 4 to 20 mA DC signal corresponding to the measured differential pressure. Its highly accurate and stable sensor can also measure the static pressure which can be shown on the integral indicator or remotely monitored via BRAIN or HART communications.

    The EJX118A is the Differential Pressure Transmitter with Remote Diaphragm Seals in the series.

    EJX118A features include:

    • ± 0.15% Accuracy
    • 200 ms Response Time
    • Exida and TUV SIL2 / SIL3 Certified
    • Local Parameter Setting (LPS)
    • 10-segment Signal Charaterizer
    • Active Capillary Fill Fluid Density Compensation

    Digital Performance

    Yokogawa’s DPharp digital sensor offers twice the performance and stability of the competitor’s analog sensors. The DPharp uses the latest in IC Chip-style design and manufacturing technology. Analog sensors are based on older design technology. Although analog sensors are good, the modern DPharp sensor out performs them. A Yokogawa transmitter with DPharp digital sensor will give you the consistent, reliable, accurate measurement you need.

    Superior Design

    All remote seal system on the market use fill fluid to ‘transmit’ the process pressure from the remote diaphragm seal to the pressure sensor in the transmitter. The physical properties of the fill fluid change has process temperature and ambient temperature change causing the transmitter to measure inaccurately. This effect get worse the longer the capillaries are. The key is to filter out this ‘noise’ to get an accurate, consistent, reliable measurement. Yokogawa has a superior design, manufacturing process, and features to reduce this ‘noise’.

    Signal Characterization

    Signal characterization is a versatile function available on all Yokogawa pressure transmitters. The function is used to compensate the analog 4 to 20 mA output signal for non-linear applications. Such applications include tank strapping or flow measurements; but, it can be used in any application where the relationship between the pressure input and the desired output signal are known. This feature can use up to 10-points.

    Rugged Construction

    Ruggedly constructed differential pressure transmitter can help your plant reduce failures. Yokogawa’s DP transmitters have construction features that are designed to allow it to outlive your plant. Four-bolt pressure retaining design, Active DPharp sensor, and dual seal certified to ANSI/ISA 12.27.01 – all design features to extend the life of the transmitter.

    Extended Calibration Intervals

    Yokogawa EJX-A series pressure transmitters have a long-term stability under all operational conditions. As you gain experience with these transmitters, you will be able to extend the time between calibration checks.

    Multiple Communication Options

    Yokogawa offers several platforms to communicate to your transmitter.

    FieldMate is a PC based communication platform that can communicate with your transmitter and manage your entire instrument inventory.

    FieldMate HHC is a traditional hand-held platform that allows you to take that information into the field.

    Forgot your HHC? No problem. The LPS feature on the transmitter allows you to update 9 parameters without the use of an HHC.

    Learn about other Differential Pressures at BBP.

    DOWNLOAD BROCHURE
  • EJX130A

    The EJX130A is a_traditional-mount, high static differential pressure transmitter_and_is part of the_EJX-A series. It_features a single crystal silicon resonant sensor and is suitable to measure liquid, gas, or steam flow as well as liquid level, density and pressure. EJX130A outputs a 4 to 20 mA DC signal corresponding to the measured differential pressure. Its highly accurate and stable sensor can also measure the static pressure which can be shown on the integral indicator or remotely monitored via BRAIN or HART communications.

    The EJX130A is designed to measure accurately, transmit quickly, and do it reliably over time.

    • Accurately: ± 0.04% Accuracy
    • Quickly: 150 ms Response Time
    • Reliably: ± 0.1% Stability per 15 years

    Digital Performance

    Installed performance 2x better using all digital DPharp pressure sensor.

    Yokogawa’s digital sensor provides superior performance and stability compared to analog sensors.

    More Information

    Save up to 20% on CAPEX spending using our transmitter’s multi-sensing capability.

    Using digital communication, one EJX130A can supply your control system with Level (Primary variable), Blanket Pressure (Secondary variable), and Sensor Temperature (Third variable)—eliminating the need for multiple transmitters.

    Standard Diagnostics

    Reduce unscheduled maintenance by 60%

    Over 40 diagnostics to ensure everything is OK. Active Sensor Technology monitors the DPharp sensor while the Patented Back-check Technology is reverse checking all calculations in real-time.

    Rugged Construction

    Reduce failures in the field by 200%.

    Over-pressure Protection

    Reduce failures and calibrations.

    Yokogawa DPharp pressure transmitters have an integral over-pressure mechanism to protect your transmitters from process surges or improperly sequenced manifolds.

    Extended Calibration Intervals

    Reduce maintenance cost by 33%.

    Multiple Communication Options

    FieldMate PC based communication platform allows management of your entire instrument inventory.

    FieldMate HHC allows you to take that information into the field.

    LPS can update 9 parameters in the field without the use of an HHC.

    Learn more about Differential Pressures at BBP.

    DOWNLOAD BROCHURE

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