The Yokogawa EJA310A high-performance absolute pressure transmitter can be used to measure the pressure of liquids, gases, or steam, and then convert it into a 4-20mA DC current signal output. The EJA310A can also communicate with BRAIN handheld devices or CENTUM CS/μXL or HART 375/475 handheld devices for settings and monitoring. The EJA series supports BRAINHART and FOUNDATION™ fieldbus or PROFIBUS PA communication protocols. 
　　1. Product Specifications: Yokogawa EJA310A Absolute Pressure Transmitter 
L Diaphragm M Diaphragm A Diaphragm 
Measurement Range 0~10kPa 0~130kPa 0~3MPa 
(0~2.95inHg) (0~38inHg) (0~430psia) 
Measuring Range 0.67~10kPa 1.3~130kPa 0.03~3MPa 
(0.2~2.95inHg) (0.38~38inHg) (4.3~430psi) 
Accuracy ±0.2% ±0.15% ±0.15% 
Protection Level: IP67, NEMA 4X, and JIS C0920 immersion-proof 
Explosion-proof Specifications: FM, CENELEC ATEX, CSA, IECEx 
Output Signal: 4~20mA DC or FOUNDATION fieldbus or PROFIBUS PA two-wire digital communication 
Power Supply: BRAIN and HART: 10.5~42V DC (Intrinsically Safe: 10.5~30V DC) 
Fieldbus: 9~32V DC (Intrinsically Safe Entity mode 9~24V DC, Intrinsically Safe FISCO mode 9~17.5V DC) 
Ambient Temperature: -40~85℃ (-40~185℉) (Standard Type) 
-30~80℃ (-22~176℉) (Built-in Indicator) 
Process Temperature: M and A Diaphragm: -40~120℃ (-40~248℉) (Standard Type) 
L Diaphragm: -40~100℃ (-40~212℉) (Standard Type) 
Maximum Overpressure: 500kPa 500kPa 4.5MPa 
(72psia) (72psia) (645psia) 
Installation: 2-inch pipe installation 
Wetted Parts Material: Diaphragm SUS316L (Diaphragm: Hastelloy C-276) 
Flange Material: SUS316 
Housing: Aluminum alloy or SUS316 stainless steel (optional) 
      2. Product Features: 
- Excellent performance and stability 
The EJA series uses single crystal silicon resonant sensor technology. Single crystal silicon has no hysteresis effect for pressure or temperature changes, making it an ideal material. The single crystal silicon resonant sensor minimizes the effects of overpressure, temperature changes, and static pressure, providing unparalleled long-term stability. 
- Compact and lightweight design 
The use of ASIC amplifier design reduces the size of the package, and the miniaturization of the diaphragm structure and flange has reduced the weight of this model to half that of the original model. The ASIC design not only reduces the number of parts but also improves the reliability of the amplifier. 
- Fieldbus communication capability 
Fieldbus is a bidirectional digital communication system, an innovative technology for configuring instrument control systems, and a promising upgrade product to replace the widely used standard 4~20mA analog communication in current field instruments. 
The EJA series offers two fieldbus modes, FOUNDATION? fieldbus low voltage mode and PROFIBUS PA devices, to achieve collaboration between Yokogawa and other suppliers. In terms of software, the EJA series uses two AI function blocks to calculate differential pressure and static pressure, enabling flexible instrument configuration. 
　　3. Product Selection Table:

Note 1: Flange and process connection material. Note 2: Diaphragm material is Hastelloy C-276 or ASTM N10276, and the remaining wetted parts material is SUS316L. 
Note 3: Select codes C and D for mounting brackets if necessary. Note 4: Select codes A and B for mounting brackets if necessary. 
Note 5: Not applicable for output signal code F. 
Note 6: Users must consider the material characteristics of the wetted parts and the corrosiveness of the medium; inappropriate materials may lead to unexpected corrosive medium leaks, causing serious harm to humans and factory equipment. 
When selecting, please note: If the medium is highly corrosive, such as hydrochloric acid, sulfuric acid, H2S, sodium hypochlorite, etc., or if the temperature is 150°C or above, please contact us at: 029-84516813.