Chongqing Head Automatization Co., Ltd.
Main products:Controller, Speed Controller, Voltage Regulator, Actuator, Generator Set
Contact Us
  • Contact Person : Mr. wei ren
  • Company Name : Chongqing Head Automatization Co., Ltd.
  • Tel : 0086-023-63176116
  • Fax : 0086-023-68241313
  • Address : Chongqing,Chongqing,11 Floor Hai Yu Building No.9, ShuangYuna Road, BeiBei District
  • Country/Region : China
  • Zip : 400700

EJA438 YOKOGAWA Diaphragm Sealed Gauge Pressure Transmitter

EJA438 YOKOGAWA Diaphragm Sealed Gauge Pressure Transmitter
Product Detailed
YOKOGAVA Transmitter: EJA110A,EJA120A,EJA130A,EJA210A/220A,EJA310A,EJA430A,EJA440A,EJA510A/EJA530A,EJA118,EJA438,EJA115,EJA213

We supply the following YOKOGAVA Transmitter:


1> EJA110A

2> EJA120A

3> EJA130A

4> EJA210A/220A

5> EJA310A

6> EJA430A.

7> EJA440A

8> EJA510A/EJA530A

9> EJA118

10> EJA438

11> EJA115

12> EJA213


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 EJA438W and EJA438N Diaphragm Sealed Gauge Pressure Transmitters can be used to measure liquid, gas or steam pressure. They output a 4 to 20 mA DC signal corresponding to the measured pressure.

The EJA Series is available with BRAIN, HART, FOUNDATION fieldbus or PROFIBUS PA communication protocols.


--Excellent performance and stability

The EJA series uses a formed from monocrystal silicon, a perfect material which has no hysteresis in pressure or temperature changes. The sensor minimizes overpressure, temperature change, and static pressure effects, and thus offers unmatched long-term stability.

-- Compact and light-weight design

Half the weight of conventional models thanks to miniaturization of the casing with the amplifier ASIC, pressure cell structure, and flange. The ASIC uses the minimum number of parts and improves the reliability of the amplifier.

-- Fieldbus communication capability

Fieldbus is a digital two-way communication system. It is a revolutionary technology for configuring instrumentation control systems and a promising successor to the standard 4 to 20 mA analog communication used in most field instruments today.EJA series offers two types of fieldbus models, FOUNDATION fieldbus Low Voltage Mode and PROFIBUS PA devices, which ensure interoperability between Yokogawa and other manufactures. As for software, the EJA series incorporates two AI function blocks that compute differential and static pressures to allow flexible configuration of instrumentation.


 Diaphragm Sealed Gauge Pressure Transmitters
EJA438W/EJA438NA CapsuleEJA438WB CapsuleEJA438NB Capsule
Range-0.1 to 3 MPa(-15 to 430 psi)-0.1 to 14 MPa(-15 to 2000 psi)-0.1 to 7 MPa(-15 to 1000 psi)
Span0.06 to 3 MPa(8.6 to 430 psi)0.46 to 14 MPa(66 to 2000 psi)0.46 to 7 MPa(66 to 1000 psi)
Degrees of protectionIP67, NEMA 4X, and JIS C0920 immersion proof
Output4 to 20 mA DC or FOUNDATION fieldbus or PROFIBUS PA 2-wire system with digital communication
Supply voltageBRAIN and HART:10.5 to 42 V DC (10.5 to 30 V DC for Intrinsically safe type)Fieldbus:9 to 32 V DC (9 to 24 V DC for Entity model and 9 to 17.5 V DC for FISCO model)
Ambient temperature-40 to 60 deg C (-40 to 140 deg F) (general use type)-30 to 60 deg C (-22 to 140 deg F) (with integral indicator)It must be within the fill fluid operating temprature range
Process temperature-50 to 300 deg C (-58 to 572 deg F)It must be within the fill fluid operating temprature range
Maximum working pressureMax. measurement range valveThe working pressure must be within the flange rating.
MountingTransmitter: 2-inch pipe mountingDiaphragm seal: flange mounting
Process flange sizeFlush type: 3-inch (80mm), 2-inch (50mm)Extended type: 4-inch (100mm), 3-inch (80mm)
Diaphragm materialSUS316L, Hastelloy C-276, Tantalum, Titanium
Process flange materialS25C, SUS304, SUS316
HousingCast aluminum alloy or SUS316 equivalent stainless steel (optional)

EJA438 YOKOGAWA Diaphragm Sealed Gauge Pressure Transmitter

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