Yokogawa EJA438W and EJA438NDiaphragm Sealed Gauge Pressure Transmitters

Yokogawa EJA438W and EJA438NDiaphragm Sealed Gauge Pressure Transmitters
Product Details

Yokogawa EJA438W and EJA438N Diaphragm Sealed Gauge Pressure Transmitters

Unit price : 625-780USD       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

Degrees of Protection:

IP67, NEMA4X, JIS C0920 immersion proof

Explosion-protected Construction:

See ‘Optional Specification.

Integral Indicator:

LCD digital indicator (optional)

Transmitter Material:

Cover flange; JIS SCS14A Cover flange bolts; See ‘Model and Suffix Codes.’

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))

Power Supply :

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

Working Pressure Range:

2.7 kPa abs{20 mmHg abs} to flange rating pressure. For atmospheric pressure 

or below, see Figure 2


17.3 kg (38.2 lb) Model EJA118W with 80 mm JIS 10K flange, capillary length 5 m; with integra

l indicator and mounting bracket.

22.9 kg (50.6 lb) Model EJA118N with 100 mm JIS 10K flange, X2=100, capillary length 5 m; with integral

indicator and mounting bracket.

20.1 kg (44.4 lb) Model EJA118Y with 100 mm JIS 10K flange, X2=100, capillary length 5 m; with integral

indicator and mounting bracket.

Add 1.4 kg (3.1lb) for JIS SCS14A stainless steel amplifier housing.

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. 

Feature :

A reliable measurement method is provided to avoid the contact of the diaphragm of the transmitter with the

 pressure transmitter and differential pressure transmitter.Simulation type, zero point and range migration are

 adjusted by potentiometer, optional M2 and M3 field head, flange size and capillary length can be selected.

Specification of seal :

General type sealed diaphragm pressure transmitter: - 40 ~ 85 ℃ (40 ~ 185 -?F)

With digital meter diaphragm sealed pressure transmitter: - 30 ~ 80 ℃ (176-22 ~?F)

1.3 working pressure (rated working pressure of flange: 2.7kpa abs or 20mmHg abs)

The influence of the power supply voltage changes: 1.4 + / - 0.005% / V (21.6 ~ 32 V DC, 350 Ω)

1.5 installation: transmitter: 2inch pipe installation;Diaphragm seal: flange mounting.

1.6 installation flange specification: the flange of ANSI specification is on the side that is in contact with 

the gasket to be serrated (according to ANSI B16.5).

1.7 waterproof structure: JIS C0920 waterproof type (equivalent to IEC IP67 and NEMA 4X)

1.8 transmitter material: flange: JIS SUS14A;Flange bolts: refer to "code table of type and specification"

1.9 diaphragm seal material: capillary: JIS SUS316;Protective tube: JIS SUS304;PVC shielding (PVC 

       maximum service temperature: 100 ℃)

1.10 damping time constant: the additive value of the time constant of the amplifier assembly and the membrane

 box with diaphragm seal (the time constant of the amplifier assembly is 0.2-64 seconds, which can be set in 9 segments;When the capillary tube is 3m long, the injected liquid code A is obtained at normal temperature).

Dimensions :

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