Product Description

The  EJX120A  high-performance micro differential pressure transmitter adopts single crystal silicon resonant sensor technology,  which is suitable for measuring the flow rate, liquid level, density, and pressure of liquids, gases, or vapors.  EJX120A  converts measured differential pressure into 4-20mA DC current signal output, with functions such as fast response,  remote setting, and self diagnosis.

Yokogawa  EJX120A  is a high-precision micro differential pressure intelligent transmitter of Yokogawa EJX-A series, which adopts  Yokogawa's original DPharp monocrystalline silicon resonant sensing technology and specializes in measuring ultra  micro differential pressure, furnace negative pressure, and micro wind pressure.

Specially designed for low differential pressure and small range operating conditions, with a range ratio of up to  40:1, high measurement accuracy, excellent long-term stability, strong anti-interference ability, and support for  multiple communication methods such as HART and fieldbus.

The whole machine comes standard with SIL2 functional safety certification, multi country explosion-proof  certification, protection level IP67, sturdy structure, high and low temperature resistance, and optional liquid  contact materials such as 316L and Hastelloy, suitable for gas, clean media, and micro negative pressure environments.

Widely used in industrial automation scenarios such as boiler furnace negative pressure, HVAC clean room pressure  difference, duct air pressure, small flow differential pressure, tank micro liquid level, flue gas duct differential  pressure, etc., it is the preferred model for micro differential pressure measurement in power plants, HVAC, chemical,  and pharmaceutical industries.

Product Features

1. High precision micro differential pressure measurement with Yokogawa DPharp silicon resonant sensor, reference      accuracy up to ±0.09%.

2. Ultra high turndown ratio up to 40:1, covers multiple measuring ranges with one transmitter.

3. Excellent long-term stability, minimal zero drift, reduces calibration frequency and maintenance cost.

4. Fast response speed, accurately captures tiny pressure fluctuation for draft and air duct applications.

5. Supports 4-20mA + HART 5/7, optional BRAIN, FF Fieldbus, PROFIBUS PA for various DCS systems.

6. Built-in SIL 2 safety certification with ATEX, IECEx, FM, CSA international explosion-proof approvals.

7. IP67 protection grade, dustproof and waterproof, suitable for harsh outdoor and industrial environments.

8. Standard 316L stainless steel wetted parts, optional Hastelloy and Monel for corrosive media.

9. Strong overpressure resistance on single side, protects sensor from pressure impact and extends service life.

10. Intelligent self-diagnosis function, easy installation, commissioning and daily maintenance.

Application scenarios  

1. Boiler / Kiln: Furnace negative pressure and flue gas differential pressure monitoring.

2. HVAC: Cleanroom, Duct Differential Pressure / Air Velocity Control.

3. Low Flow Measurement: Differential Pressure Detection for Micro Flow of Gas / Steam.

4. Liquid Level / Interface Level: Micro liquid level differential pressure measurement for atmospheric /      low-pressure tanks.