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EJX438B Wireless Pressure Transmitter
Brand: Yokogawa Electric CorporationDiaphragm seals are used to prevent process medium from entering directly into the pressure sensing assembly of the differential pressure and pressure transmitters, they are connected to the transmitter using capillaries filled with fill fluid.
EJX438B Diaphragm Sealed Gauge Pressure Transmitters can be used to measure liquid, gas, or steam flow, as well as liquid level, density and pressure.
EJX438B transmit not only process variables but also the setting parameters using wireless signal.
The transmitters run on internal batteries, and the installation cost can be decreased since hard wiring is not required. The communication protocol is compliant with ISA100.11a protocol specifications.
Features- Long Life Battery Design
- Ultra low current consumption design using two high capacity lithium-thionyl chloride batteries provide wireless operation for years.
- Security Assured Wireless Network Joining
- Infrared communication between the devices for wireless network configuration and parameter setting.
- Quick Update Time
- Selectable from 0.5 second to 60 minutes for measured process value to publish wirelessly.
Specifications
Accuracy
- ± (0.1 + 0.005 URL/Span) % of Span - Measurement Span A & B (Includes Terminal-based Linearity, Hysteresis & Repeatability)
- ± 0.15 % of Span - Measurement Span A & B (Includes Terminal-based Linearity, Hysteresis & Repeatability)
- 1 MPa or Higher: ± 0.2 % of Span - Absolute Pressure
Ambient Temperature Range
- -10° to 60° C (14° to 140° F) - Fluorinated Oil
- -15° to 60° C (5° to 140° F) - Silicone Oil
- -30° to 60° C (-22° to 140° F) - LCD Visible Range
- -40° to 60° C (-40° to 140° F) - Ethylene Glycol
Approvals & Certifications
- ATEX Intrinsically Safe
- CE: ETSI EN 300 328, ETSI EN 301 489-1, ETSI EN 301 489-17
- CSA Intrinsically Safe
- EMC: EN 61326-1 Class A, EN 61326-2-3
- FCC - Regulation Conformity of the Wireless Module
- FM Intrinsically Safe
- IC - Regulation Conformity of the Wireless Module
- IECEx Intrinsically Safe
- PED 97/23/EC & 2014/68/EU - Sound Engineering Practice
Capillary Length
- 3.3 to 32.8 feet (1 to 10 metres)
Capillary Material
- 316 Stainless Steel
Communication
- Data Rate: 250 Kbps - Wireless
Damping Adjustment
- 0 seconds Default - Software Damping
Dead Time
- 100 milliseconds (Nominal)
Diagnostics
- Amplifier Failure - Self Diagnostics
- Battery Alarm - Self Diagnostics
- Capsule Failure - Self Diagnostics
- Configuration Error - Self Diagnostics
- Over-Range Error for Process Variables - Self Diagnostics
- Wireless Communication Alarm - Self Diagnostics
Diaphragm Material
- 316L Stainless Steel
- Hastelloy C-276
- Tantalum
- Titanium
Display
- 5-Digit Numerical Display
- 6-Digit Unit Display
- Bar Graph
Drain, Vent Valves & Plug
- 316 Stainless Steel (Hoop)
- PTFE Teflon (Filler)
Electrical Connectors
- 1/4” NPT - Vent/Drain Plugs
- R: 1/4” - Vent/Drain Plugs
Enclosure Finish
- Anti-Corrosion Coating
Enclosure, Body Material
- Aluminum Alloy - Low Copper Cast with Polyurethane Paint
Environmental Protection
- IP66
- IP67
- NEMA 4X
Fill Material
- Ethylene Glycol
- Fluorinated Oil
- Silicone Oil
Flange Material
- 304 Stainless Steel - Process Flange, Protection Tube (PVC-Sheathed)
- 316 Stainless Steel - Process Flange, Name Plate & Tag (Tag Plate Wired Onto Transmitter)
- ASTM CF-8M - Cover Flange
- JIS S25C - Process Flange
Flange Size - 1-1/2” (DN 40)
- 1-1/2” (DN 40) - 150# ANSI/JPI
- 1-1/2” (DN 40) - 300# ANSI/JPI
- 1-1/2” (DN 40) - 600# ANSI/JPI
- 1-1/2” (DN 40) - JIS 10K
- 1-1/2” (DN 40) - JIS 20K
- 1-1/2” (DN 40) - JIS 40K
- 1-1/2” (DN 40) - JIS 63K
- 1-1/2” (DN 40) - PN 10
- 1-1/2” (DN 40) - PN 16
- 1-1/2” (DN 40) - PN 25
- 1-1/2” (DN 40) - PN 40
- 1-1/2” (DN 40) - PN 64
Flange Size - 2” (DN 50)
- 2” (DN 50) - 150# ANSI/JPI
- 2” (DN 50) - 300# ANSI/JPI
- 2” (DN 50) - 600# ANSI/JPI
- 2” (DN 50) - JIS 10K
- 2” (DN 50) - JIS 20K
- 2” (DN 50) - JIS 40K
- 2” (DN 50) - JIS 63K
- 2” (DN 50) - PN 10
- 2” (DN 50) - PN 16
- 2” (DN 50) - PN 25
- 2” (DN 50) - PN 40
- 2” (DN 50) - PN 64
Flange Size - 3” (DN 80)
- 3” (DN 80) - 150# ANSI/JPI
- 3” (DN 80) - 300# ANSI/JPI
- 3” (DN 80) - 600# ANSI/JPI
- 3” (DN 80) - JIS 10K
- 3” (DN 80) - JIS 20K
- 3” (DN 80) - JIS 40K
- 3” (DN 80) - JIS 63K
- 3” (DN 80) - PN 10
- 3” (DN 80) - PN 16
- 3” (DN 80) - PN 25
- 3” (DN 80) - PN 40
- 3” (DN 80) - PN 64
Flange Size - 4” (DN 100)
- 4” (DN 100) - 150# ANSI/JPI
- 4” (DN 100) - 300# ANSI/JPI
- 4” (DN 100) - JIS 10K
- 4” (DN 100) - JIS 20K
- 4” (DN 100) - JIS 40K
- 4” (DN 100) - PN 10
- 4” (DN 100) - PN 16
- 4” (DN 100) - PN 25
- 4” (DN 100) - PN 40
Fluid Specific Gravity
- 0.94 to 1.09 - Silicone Oil
- 1.90 - Ethylene Glycol
- 1.90 to 1.92 - Fluorinated Oil
Frequency
- 2,400 to 2,483.5 MHz License Free ISM Band - Wireless
Function
- Software Download Functions
Gasket Material
- 316 Stainless Steel
- PTFE
Humidity
- 0 to 100 % Relative Humidity - Ambient Humidity Limits
Media
- Gas
- Liquids
- Steam
Mounting
- 2” (50.8 mm) Pipe
Mounting Position
- Horizontal
NACE & NIST
- NACE MR-0175 / ISO 15156, MR-0103
Nut & Bolt Material
- 316L Stainless Steel - Coverflange
- 660 Stainless Steel - Coverflange
- B7 Carbon Steel - Coverflange
Output
- Wireless (ISA100.11a Protocol) 2.4 GHz Signal
Output Function
- Linear Output
Power
- Maximum
Power Supply
- 7.2 V, 19 Ah Two Lithium-Thionyl Chloride Battery
Pressure Range
- bar: -1 to 160
- MPa: -0.1 to 16
- psi: -14.5 to 2,300
Pressure Type
- Absolute
- Gauge
Process Connection Style
- Extended Typical
- Flush Typical
Process Temperature
- -20° to 120° C (-4° to 248° F) - Fluorinated Oil
- -30° to 310° C (-22° to 590° F) - Silicone Oil
- -50° to 100° C (-58° to 212° F) - Ethylene Glycol
Response Time
- 200 milliseconds
Ring Material
- 316 Stainless Steel (Hoop)
- PTFE Teflon (Filler)
Span - Minimum
- psi: 73 (MPa: 0.5, bar: 5)
Supply Pressure
- psi: 0.38 (kPa: 2.7, bar: 0.027) - Silicone Oil
- psi: 14.5 (kPa: 100, bar: 1) - Ethylene Glycol
- psi: 7.4 (kPa: 51, bar: 0.51) - Fluorinated Oil
Temperature Effect
- ± (0.5 % of Span + 0.025 % of URL) Per 25° C (50° F) Change - Ambient Temperature Effect for Measurement Capsule A & B
Update Time
- 0.5 to 3,600 seconds - Intermittent Measurement
- 100 milliseconds - Continuous Measurement
Wetted Materials
- 316L Stainless Steel
- Hastelloy C-276
- Tantalum
- Titanium
Zero Offset
- External Zero is Continuously Adjustable with 0.01 % Incremental Resolution of Span
