Yokogawa Diaphragm Sealed Gauge Pressure Transmitter, EJA438N
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EJA438N Diaphragm Sealed Gauge Pressure Transmitter

Brand: Yokogawa Electric Corporation

Diaphragm seal is used to prevent process medium from entering directly into the pressure-sensing assembly of the pressure transmitter. It is connected to the transmitter using capillary filled with fill fluid.

Models EJA438N Diaphragm Sealed Gauge Pressure Transmitters can be used to measure liquid, gas or steam pressure. They output a 4-20 mA DC signal corresponding to the measured pressure.

The models EJA438N feature remote setup and monitoring through communications with the model BT200/100 BRAIN TERMINAL, CENTUM CS/XL system etc.
Features
  • 0.2% Accuracy
  • 700 ms Response Time
  • External Zero Adjust

Flange Size

Flange Size

Output

Output

Measurement Span

Measurement Span

Wetted Material

Wetted Material
  • view details

Flange Rating

Flange Rating

Extension Length

Extension Length

Process Flange / Material

Process Flange / Material

Process Flange / Material

Process Flange / Material

Bolt & Nut Material

Bolt & Nut Material

Fill Fluid

Fill Fluid

Capillary Length

Capillary Length

Capillary Length

Capillary Length

Installation

Installation

Electrical Connection

Electrical Connection

Integral Indicator

Integral Indicator

Mounting

Mounting

FM Approval

FM Approval

CSA Approval

CSA Approval

IECEx Approval

IECEx Approval
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TIIS Approval

TIIS Approval

Flameproof Packing Adapter

Flameproof Packing Adapter

Painting

Painting

Exterior Parts

Exterior Parts
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O-Ring

O-Ring

Lightning Protection

Lightning Protection
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Oil-Prohibited Use

Oil-Prohibited Use
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Serration

Serration
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Teflon Film

Teflon Film
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Operating Temperature

Operating Temperature
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Response Time

Response Time
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Failure Alarm Down-Scale

Failure Alarm Down-Scale

NAMUR NE43 Compliant

NAMUR NE43 Compliant
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Data Configuration

Data Configuration

Amplifier Housing

Amplifier Housing

Plating

Plating
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Tag Plate

Tag Plate

Capillary

Capillary

Calibration Unit

Calibration Unit

Sealing Treatment

Sealing Treatment
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Mill Certificate

Mill Certificate

Pressure Test / Leak Test Certificate

Pressure Test / Leak Test Certificate
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Pressure Test / Leak Test Certificate

Pressure Test / Leak Test Certificate
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Part Number / SKU

EJA438N-DASJ12GA-AB1.000-92NA

  • Flange Size

    4” (100 mm)

  • Output

    4-20 mA DC with Digital Communication, BRAIN Protocol

  • Measurement Span

    0.06 to 3 MPa (0.6 to 30 kgf/cm², 8.6 to 430 psi, 0.6 to 30 bar)

  • Wetted Material

    Diaphragm: JIS SUS316L, Pipe: JIS SUS316, Others: JIS SUS316

  • Flange Rating

    JIS 10K

  • Extension Length

    X2 = 50 mm (2”)

  • Process Flange / Material

    4” (100 mm), JIS S25C

  • Bolt & Nut Material

    JIS SCM435

  • Fill Fluid

    Silicone Oil for General Use, Process Temperature: -10° to 250° C (14° to 482° F), Ambient Temperature: -10° to 60° C (14° to 140° F)

  • Capillary Length

    Custom Length: metres

  • Installation

    Horizontal Impulse Piping Type, Left Side High Pressure

  • Electrical Connection

    1/2” Female NPT, Two Electrical Connections without Blind Plugs

  • Integral Indicator

    No Integral Indicator

  • Mounting

    JIS SECC, 2” Pipe Mounting (Flat Type)

  • FM Approval

    Without FM Approval

  • CSA Approval

    Without CSA Approval

  • IECEx Approval

    Without IECEx Approval

  • TIIS Approval

    Without TIIS Approval

  • Flameproof Packing Adapter

    Without Flameproof Packing Adapter

  • Painting

    Polyurethane, Deep Sea Moss Green Paint (Munsell 0.6GY3.1/2.0)

  • Exterior Parts

    Standard Materials

  • O-Ring

    No Fluro-Rubber O-Ring

  • Lightning Protection

    Without Lightning Protection

  • Oil-Prohibited Use

    No Oil-Prohibited Use

  • Serration

    Standard Serration

  • Teflon Film

    No Teflon Film on Diaphragm

  • Operating Temperature

    Standard Operating Temperature

  • Response Time

    Standard Response Time

  • Failure Alarm Down-Scale

    Output Status at CPU Failure & Hardware Error is -2.5 %, 3.6 mA DC or Less

  • NAMUR NE43 Compliant

    Without NAMUR NE43 Compliant

  • Data Configuration

    Without Data Configuration

  • Amplifier Housing

    Cast Aluminum Alloy

  • Plating

    No Plating on Diaphragms

  • Tag Plate

    Without Tag Plate

  • Capillary

    Without Capillary

  • Calibration Unit

    kPa Calibration (kPa Unit)

  • Sealing Treatment

    No Sealing Treatment

  • Mill Certificate

    Without Mill Certificate

  • Pressure Test / Leak Test Certificate

    No Pressure Test/ Leak Test Certificate

View Details

Specifications

Brand

Accuracy

  • ± 0.2 %

Alarm

  • Down-Scale: -2.5 %, 3.6 mA DC or Less
  • Down-Scale: -5 %, 3.2 mA DC or Less
  • Up-scale: 110 %, 21.6 mA DC or more (Standard)

Ambient Temperature Range

  • -30° to 60° C (-22° to 140° F) - Integral Indicator
  • -40° to 60° C (-40° to 140° F) - General-Use Typical

Approvals & Certifications

  • Leak Test
  • Mill Certificate
  • Pressure Test

Approvals & Certifications

  • ATEX Flameproof
  • CSA Explosion-proof & Intrinsically Safe
  • EMC EN 61326-1 Class A, EN 61326-2-3
  • FM Explosion-proof & Intrinsically Safe Approval
  • IEC Ex Intrinsically Safe, Typical N & Flameproof Approval
  • NAMUR NE43
  • PED 97/23/EC - Sound Engineering Practice
  • TIIS Flameproof & Intrinsically Safe Approval

Cable Material

  • Polyethylene Insulated PVC Sheathed

Capillary Length

  • 16.4 feet (5 m)

Capillary Material

  • JIS SUS316 - Capillary Tube

Communication

  • BRAIN
  • FOUNDATION Fieldbus
  • HART
  • PROFIBUS PA

Current

  • 6,000 A, Max.

Damping Adjustment

  • 0.2 to 64 seconds - Set in 9 Increments

Diaphragm Material

  • JIS SUS316L

Display

  • LCD Display

Distance

  • 2 Kilometers (1.25 Miles) when CEV - Communication Distance

Electrical Connectors

  • 1/2" NPT Female
  • Blind Plug
  • G 1/2" Female
  • M20 Female
  • PG13.5 Female

Enclosure Finish

  • Deep Sea Moss Green (Munsell 0.6 GY3.1/2.0)
  • Epoxy Resin-Baked Coating
  • Polyurethance Resin Baked Finish

Enclosure, Body Material

  • Cast Aluminum Alloy - Amplifier Housing
  • JIS SCS14A (Stainless Steel) - Amplifier Housing

Environmental Protection

  • IP67
  • NEMA 4X

Fill Material

  • Ethylene Glycol
  • Fluorinated Oil
  • Silicone Oil

Flange Material

  • JIS S25C
  • JIS SCS14A - Cover Flange
  • JIS SUS304
  • JIS SUS316

Flange Size - 3” (DN 80)

  • 3" (DN 80) - 150# ANSI / JPI
  • 3" (DN 80) - 300# ANSI / JPI
  • 3" (DN 80) - DIN PN 10
  • 3" (DN 80) - DIN PN 16
  • 3" (DN 80) - DIN PN 25
  • 3" (DN 80) - DIN PN 40
  • 3" (DN 80) - JIS 10K
  • 3" (DN 80) - JIS 20K
  • 3" (DN 80) - JIS 40K

Flange Size - 4” (DN 100)

  • 4" (DN 100) - 150# ANSI / JPI
  • 4" (DN 100) - 300# ANSI / JPI
  • 4" (DN 100) - DIN PN 10
  • 4" (DN 100) - DIN PN 16
  • 4" (DN 100) - DIN PN 25
  • 4" (DN 100) - DIN PN 40
  • 4" (DN 100) - JIS 10K
  • 4" (DN 100) - JIS 20K
  • 4" (DN 100) - JIS 40K

Fluid Specific Gravity

  • 0.94 to 1.09 at 25° C (77° F) - Silicone Oil
  • 1.09 at 25° C (77° F) - Ethylene Glycol
  • 1.90 to 1.92 at 25° C (77° F) - Fluorinated Oil

Humidity

  • 5 to 100 % RH at 40° C (104° F) - Ambient Humidity

Input Impedance

  • 10 kΩ or more at 2.4 kHz

Load

  • 0.22 μF or Less - Load Capacitance
  • 3.3 MH or Less - Load Inductance

Materials of Construction

  • JIS SECC - Mounting Bracket
  • JIS SUS304 - Protection Tube, Tag Plate, Mounting Bracket
  • JIS SUS316 - Tag Plate, Mounting Bracket

Mounting

  • 2" Pipe Mounting - Transmitter
  • Flange Mounting - Diaphragm Seal

Mounting Position

  • Horizontal

NACE & NIST

  • NACE MR-0175

Nut & Bolt Material

  • JIS SCM435 - Cover Flange
  • JIS SUS630 Stainless Steel - Cover Flange

O-Ring Material

  • Fluororubber

Operating Temperature

  • 20° to 150° C (68° to 302° F) - Teflon Film
  • Maximum

Output

  • 3.8 - 20.5 mA
  • 4-20 mA DC (2-Wire)

Plug Material

  • SUS316 (316 Stainless Steel) - Blind Plug

Power Supply Effect

  • ± 0.005 % per Volt (21.6 - 32 Vdc, 350 ohms)

Pressure Range

  • bar: -1 to 70
  • kPa: -100 to 7,000
  • psi: -14.5 to 1,015

Pressure Type

  • Gauge

Process Temperature

  • -50° to 300° C (-58° to 572° F)

Response Time

  • 0.3 second, Max.

Screw Material

  • 316 Stainless Steel - Zero-Adjustment Screw, Stopper Screw

Supply Pressure

  • psi: 0.38 to 14.5 (kPa: 2.7 to 100, bar: 0.026 to 1)

Supply Voltage

  • 10.5-28 Vdc - TIIS Intrinsically Safe Typical
  • 10.5-30 Vdc - Intrinsically Safe, Typical N, Non-Incendive or Non-Sparking Typical
  • 10.5-32 Vdc - Lightning Protector
  • 10.5-42 Vdc - General Use & Flameproof Typical
  • 16.4-42 Vdc - Communication Line

Temperature Effect

  • ± 1.4 %/50° C (122° F) - Zero Shift Ambient Temperature Effect
  • ± 1.6 %/50° C (122° F) - Total Shift Ambient Temperature Effect

Update Time

  • 0.125 second

Wetted Materials

  • JIS SUS316 Stainless Steel - Pipe

Zero Offset

  • Continuously Adjustable Resolution: 0.01 % of Span - External Zero Adjustment

Documentation

Data Sheets

Document

Manual

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