Yokogawa EJA438W and EJA438N Diaphragm Sealed Gauge Pressure Transmitters supplier Manufacturer

Yokogawa EJA438W and EJA438N Diaphragm Sealed Gauge Pressure Transmitters

Unit price : 480-770USD       Min Order : 1 piece 

Payment Terms:L/C, T/T, Western Union .

Delivery time : 2-3weeks 

Transmitter Specifications:


4 to 20 mA DC, 2-wire system with digital communication

Diaphragm Seal Material:

Diaphragm and other wetted parts;

See ‘Model and Suffix Codes.’

Capillary tube; JIS SUS316

Protection tube; JIS SUS304

PVC-sheathed (Max. operating temperature of PVC,

100 ˚C (212 ˚F))

Transmitter Material:

Cover flange; JIS SCS14A

Cover flange bolts; See ‘Model and Suffix Codes.

Degrees of Protection:

IP67, NEMA4X, JIS C0920 immersion proof

Explosion-protected Construction:

See ‘Optional Specification.

Supply Voltage :

10.5 to 42 V DC for general use and flameproof type

10.5 to 32 V DC for lightning protector (Optional code /A)

10.5 to 30 V DC for intrinsically safe, Type n,

nonincendive, or non-sparking type

10.5 to 28 V DC for TIIS intrinsically safe type

Basic Information :

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 models EJA438W and EJA438N feature remote setup and monitoring through communications with the model BT200/100 BRAIN TERMINAL, CENTUM CS/XL system, etc.


1. EJA110A Differential pressure transmitter

2. EJA120A Differential pressure transmitter

3. EJA130A High Static pressure transmitter

4. EJA210A,220A Flange installation type differential pressure transmitter.

5. EJA310A Absolute pressure transmitter

6. EJA430A Pressure transmitter

7. EJA440A High pressure transmitter 30A Absolute pressure/pressure transmitter.

8. EJA118W,N,Y Diaphragm seal type differential pressure transmitter

9. EJA115 Tiny flow transmitter

10. EJA213,233 Health type liquid level transmitter.

11. EJA113W Health type diaphragm sealed differential pressure transmitter

12. EJA433W Health type diaphragm sealed pressure transmitter

13.EJA510A EJA530A Pressure transmitter

14. EJA series HART communication transmitter.


More series EJX Pressure transmitter

EJX110A  EJX115A   EJX118A    EJX120A   EJX130A   EJX210A   EJX310A   EJX430A   EJX438A   EJX440A   EJX510A/EJX530A  EJX610A/EJX630A  EJX910A  EJX930A

Main features: 

Working principle: 

By monocrystalline silicon resonant sensor on the two H form on the vibration of the beam, respectively, the differential pressure, pressure signal into frequency signal and sent to the pulse counter, then the difference between the two frequency transfer directly to the CPU for data processing, the D/A converter is converted into A corresponding to the input signal is 4 ~ 20 madc output signal, and A BRAIN/HART, superimposed on the analog signal digital signal to communicate. Bellows components of built-in features fixed memory storage of environment temperature, static pressure sensor and the input/output characteristics correction data, the CPU operation, can make the transmitter gain good temperature characteristic and static characteristic and the input/output characteristics. Through the I/O port and the external devices (such as portable intelligent terminal BT200 or 275 and DCS with communication function of I/O card) in digital communication transmission, the high frequency of 2.4 kHz (Brian protocol) or 1.2 kHz (HART protocol) digital signal superimposed on 4 ~ 20 ma signal lines, in communication, frequency signals for 4 ~ 20 ma don't have any impact. 

1, the structure principle of monocrystalline silicon resonant sensor is the core part of, or on a single crystal silicon chip adopt micro-electronic mechanical processing technology (MEMS), respectively, in the center of the surface and edge into two exactly the shape, size of H shape resonance beam vibration (H shaped resonator with two beam), and in the micro vacuum cavity, make it is not in contact with the liquid filling, and make sure it is not affected by air damping of vibration. 

2, and the principle of resonant elements Silicon resonant beam in a magnetic field, provided by the permanent magnet and transformer, amplifier and so on a positive feedback loop, let the resonance beam generate oscillation in the loop. 

3, the stress distribution When the upper and lower surface of monocrystalline silicon slice deformation will occur when pressure and formation pressure, to the compression force, the center edge under tension, and two vibration shape beam feel different strain effect, as a result, the center of the resonance beam by the compressive force and frequency is reduced, side resonant beam due to the difference between the tension and frequency corresponding to different pressure signal. 

EJA temperature characteristics of excellent properties of 1, 2, 3, excellent excellent static pressure impact characteristics of one-way overvoltage characteristics 

EJX series products: monocrystalline silicon sensor is of high quality electronic differential pressure transmitter, used in liquid, gas or steam flow rate and liquid level, density and pressure measurement. Can display table or hides inside BRAIN agreement or HART communication protocol according to the static pressure. Also has fast response, communication protocol remote set, since the diagnosis function and optional state of high/low pressure alarm output function etc. Characteristics. Can provide the FF main line at the scene. EJX series standard configuration with TUV certification. In addition to the FF site main line is suitable for SIL2 occasion. 

Contact Now :

 Xi an Xinyuan Industrial Equipment  Co.,Ltd

Web :www.xyindustrial-instrument.com

Phone:+86-15829050512 | Skype Dasiy65   Yahoo :lidasiy

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