Low Flow

Bernoulli's equation states that the pressure drop across a constriction is proportional to the square of the flow rate. Using this equation, smart differential pressure transmitters can infer the flow.

In this type of application, it is not only important to have an accurate differential pressure transmitter, but also an accurate "constriction". It is the accuracy of the total system that must be considered.

Therefore, Yokogawa combines our DP transmitter with an Integral Flow Orifice (IFO) in one unit to produce a total system to measure low flow accurately.

Which Series is Right for You?

Click the 'Details' Tab above to learn which series is right for your application.

  • EJA115E

    Standard Differential Pressure Transmitter attached to an IFO assembly based on the EJA-E Series.

    See More
  • EJX115A

    Differential Pressure Transmitter attached to an IFO assembly based on the EJX-A Series as a high performance model.

    See More


Which Series is Right for You?

Refer to the General Specification sheet located under the 'Downloads' tab for detailed specifications.

  EJA115E EJX115A
± 0.040%  
± 0.055%  
Accuracy (Integral Orifice)
± 5%
± 0.1% of URL per 15 years  
± 0.1% of URL per 10 years  
Response Time
90 msec
FMEDA Report
IEC 61508 Certified (SIL 2)
Specification Conformance



Application Note

DP Level transmitter configuration can be very time consuming. Yokogawa DPharp EJA/EJX Pressure transmitters realize reduction in man hours by smart level setup feature.

Looking for more information on our people, technology and solutions?

Contact Us