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Yokogawa Corporation of America

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Multi-sensing, an Evolution in the Silicon Resonant Sensor

EJX438A Diaphragm Sealed Gauge Pressure Transmitter

Product Information

EJX438A Diaphragm Sealed Gauge Pressure Transmitter

BRAIN HART FF TUV CE Ctick Logo

EJX Series Differential Pressure Transmitter logo
Diaphragm seal is used to prevent process medium form entering directly into the pressure-sensing assembly of the pressure transmitter, it is connected to the transmitter using capillary filled with fill fluid.

EJX438A Diaphragm Sealed Gauge Pressure Transmitters can be used to measure liquid, gas, or steam flow, as well as liquid level, density, and pressure.

The multi-sensing technology provides the advanced diagnostic function to detect such abnormalities as an impulse line blockage.
 
The EJX series is available with BRAIN, HART, and FOUNDATION™ fieldbus communication protocols.
 
 
  EJX438A general specifications PDF
 
  EJX438A User's Manual PDF
Terms of Use for Manuals
 
  List of EJX series pressure transmitter general specifications
 
  List of EJX series pressure transmitter drawings
 

Specifications

  EJX438A Diaphragm Sealed Gauge Pressure Transmitter
A Capsule B Capsule
(Flush type)
B Capsule
(Extended type)
Range -0.1 to 3.5 MPa
(-14.5 to 500 psi)
-0.1 to 16 MPa
(-14.5 to 2300 psi)
-0.1 to 7 MPa
(-14.5 to 1000 psi)
Span 0.035 to 3.5 MPa
(5 to 500 psi)
0.16 to 16 MPa
(23 to 2300 psi)
0.16 to 7 MPa
(23 to 1000 psi)
Accuracy ±0.15% ±0.15% ±0.15%
Degrees of protection IP67, NEMA 4X, and JIS C0920 immersion proof
Certificates FM, CENELEC ATEX, CSA, IECEx
Output 4 to 20 mA DC or FOUNDATION™ fieldbus, 2-wire system with digital communication
Supply voltage BRAIN 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 and 9 to 17.5 V DC for FISCO)
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 temperature range.
Process temperature -50 to 310 deg C (-58 to 590 deg F)
It must be within the fill fluid operating temperature range.
Maximum working pressure Max. measurement valve
The working pressure must be with in the flange rating.
Mounting Transmitter: 2-inch pipe mounting
Diaphragm seals: flange mounting
Process flange size
Flush type: 3-inch (80 mm), 2-inch (50 mm),
1 1/2-inch (40 mm)
Extended type: 4-inch (100 mm), 3-inch (80 mm)
Diaphragm material SUS316L, Hastelloy C-276, Tantalum, Titanium
Process flange material S25C, SUS304, SUS316
Housing Cast aluminum alloy or ASTM CF-8M stainless steel (optional)

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