YOKOGAWA EJX110A Differential Pressure Transmitter
YOKOGAWA EJX110A Differential Pressure Transmitter
Product Description
YOKOGAWA Differential Pressure Transmitter EJX110A
The high performance diff erential pressure transmitter EJX110A features single crystal silicon resonant sensor and is suitable to measure liquid, gas, or steam fl ow as well as liquid level, density and pressure. EJX110A outputs a 4 to 20 mA DC signal corresponding to the measured diff erential pressure.
Its highly accurate and stable sensor can also measure the static pressure which can be shown on the integral indicator or remotely monitored via BRAIN or HART communications. Other key features include quick response, remote set-up using communications, diagnostics and optional status output for pressure high/low alarm.
Its highly accurate and stable sensor can also measure the static pressure which can be shown on the integral indicator or remotely monitored via BRAIN or HART communications. Other key features include quick response, remote set-up using communications, diagnostics and optional status output for pressure high/low alarm.
The multi-sensing technology provides the advanced diagnostic function to detect such abnormalities as an impulse line blockage or heat trace breakage.
FOUNDATION Fieldbus and PROFIBUS PA protocol types are also available. All EJX series models in their standard confi guration, with the exception of the Fieldbus and PROFIBUS types, are certifi ed as complying with SIL 2 for safety requirement
Features
The EJX-A series is Yokogawa's premium performance line of DPharp transmitters. Released in 2004, it offers the performance and stability needed in demanding applications. The EJX-A series performance makes it the thoroughbred of the DPharp family of pressure transmitters.
The EJX110A is the traditional-mount Differential Pressure Transmitter in the series.
EJX110A features include:
± 0.04% Accuracy (0.025% Accuracy option available)
± 0.1% per 15 years Stability
90 ms Response Time
3,600 psi MWP
Exida and TUV SIL2 / SIL3 Certified
Local Parameter Setting (LPS)
± 0.1% per 15 years Stability
90 ms Response Time
3,600 psi MWP
Exida and TUV SIL2 / SIL3 Certified
Local Parameter Setting (LPS)
Application
Chemical processing: Monitoring pressure differences in reaction vessels, pipelines, and filtration systems.
Oil and gas: Measuring flow rates in pipelines, differential pressure across valves, and tank level via hydrostatic pressure.
Power generation: Controlling steam pressure in boilers, condenser differential pressure, and cooling water flow.
Water and wastewater treatment: Monitoring filter differential pressure and pump performance.
Food and pharmaceutical industries: Sanitary applications requiring accurate and hygienic pressure measurement
Oil and gas: Measuring flow rates in pipelines, differential pressure across valves, and tank level via hydrostatic pressure.
Power generation: Controlling steam pressure in boilers, condenser differential pressure, and cooling water flow.
Water and wastewater treatment: Monitoring filter differential pressure and pump performance.
Food and pharmaceutical industries: Sanitary applications requiring accurate and hygienic pressure measurement
Specification
Item | valve |
Type | Gauge pressure transmitter |
Measuring Range | Gauge pressure: 0–100 Pa to 0–40 MPa (varies by model; specific ranges include 0–1 kPa, 0–10 kPa, 0–100 kPa, 0–1 MPa, 0–10 MPa, 0–40 MPa, etc.) |
Accuracy | ±0.065% of calibrated span (including linearity, hysteresis, and repeatability) under reference conditions: temperature 15–35°C (59–95°F), static pressure 0 MPa, and ambient pressure 0.1 MPa |
Stability | ±0.1% of URL (Upper Range Limit) per 5 years |
Output Signal | - Standard: 4–20 mA DC with HART® 7 protocol (two-way digital communication, superimposed on the analog signal) - Optional: FOUNDATION Fieldbus (low-voltage mode) or PROFIBUS PA (conforms to IEC 61158-2 and EN 50170 standards) |
Sensor Technology | Monocrystalline silicon resonant sensor; converts pressure into high-frequency resonant signals (≈10 kHz) for digital processing, minimizing drift and interference |
Operating Temperature Range | - Ambient: -40–85°C (-40–185°F) - Process: -30–100°C (-22–212°F) for standard models; up to 130°C (266°F) with optional cooling extension - Storage: -50–100°C (-58–212°F) |
Pressure Limits | - Overpressure: Up to 100 times the calibrated span (varies by range; e.g., 40 MPa for high-range models) without permanent damage, protected by a unique diaphragm design that stops pressure transmission to the sensor when overloaded - Static pressure: Up to 40 MPa (depends on model) |
Wetted Materials | - Diaphragm: Hastelloy® C-276, 316L stainless steel, or tantalum (optional for corrosive media) - Diaphragm chamber: 316L stainless steel - Seal ring: 316L stainless steel (soft type) |
Housing Material | Aluminum (painted) or 316 stainless steel (optional for harsh environments) |
Electrical Connections | - Conduit entries: M20 × 1.5 or ½ NPT (1/2 NPT optional) - Wiring: 2-wire system; terminal block accepts 0.5–2.5 mm² (20–14 AWG) wires |
Ingress Protection | IP66/IP67 (NEMA 4X) for standard models; IP68 optional (for submersible or high-moisture environments) |
Safety Certifications | - Functional safety: SIL 2 compliance (per IEC 61508) - Hazardous areas: ATEX, IECEx, FM, CSA, and UL certifications for explosive atmospheres (Ex ia, Ex d, etc., depending on model) - General: CE marked, RoHS compliant |
Weight | Approximately 3.9 kg (8.6 lb) for standard flange models; varies slightly by process connection type (e.g., threaded, flange) |
Process Connections | Optional flange (ANSI, JIS, DIN), threaded (NPT, BSP), or sanitary connections (for food/pharmaceutical applications) |
Diagnostics | Built-in self-diagnostic functions (via HART/Fieldbus) including sensor errors, overrange/underrange alerts, temperature deviations, and communication faults; supports remote monitoring of device health |
