EJA120 Draft Range Differential Pressure Transmitter
The high-performance draft range differential pressure transmitter
The high performance draft range differential pressure transmitter model EJA120A outputs a 4 to 20 mA DC signal corresponding to the measured differential pressure.
The EJA Series is available with BRAIN, HART, FOUNDATION™ fieldbus or PROFIBUS PA communication protocols.
Excellent performance and stability
The EJA series uses a silicon resonant sensor formed from monocrystal silicon, a perfect material which has no hysteresis in pressure or temperature changes. The sensor minimizes overpressure,temperature change, and static pressure effects, and thus offers unmatched long-term stability.
Compact and light-weight design
Half the weight of conventional models thanks to miniaturization of the casing with the amplifier ASIC, pressure cell structure, and flange. The ASIC uses the minimum number of parts and improves the reliability of the amplifier.
Fieldbus communication capability
Fieldbus is a digital two-way communication system. It is a revolutionary technology for configuring instrumentation control systems and a promising successor to the standard 4 to 20 mA analog communication used in most field instruments today.
EJA series offers two types of fieldbus models, FOUNDATION™ fieldbus Low Voltage Mode and PROFIBUS PA devices, which ensure interoperability between Yokogawa and other manufactures. As for software, the EJA series incorporates two AI function blocks that compute differential and static pressures to allow flexible configuration of instrumentation.
|EJA120A Draft Range Differential Pressure Transmitter|
|Range||-1 to 1 kPa(-4 to 4 inH2O)|
|Span||0.1 to 1 kPa(0.4 to 4 inH2O)|
|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 or PROFIBUS PA 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 model and 9 to 17.5 V DC for FISCO model)
|Ambient temperature||-25 to 80 deg C (-13 to 176 deg F)|
|Process temperature||-25 to 80 deg C (-13 to 176 deg F)|
|Maximum working pressure||50 kPa (7.25 psi)|
|Mounting||2-inch pipe mounting|
|Wetted parts material||Capsule||SUS316L(Diaphragm material is Hastelloy C-276)|
|Housing||Cast aluminum alloy or SUS316 equivalent stainless steel (optional)|
EJA120A Pressure Transmitter Data Sheet
|EJA120A general specifications|
|List of EJA series general specifications|
|List of EJA series drawings|