Pressure/DP for oil/gas industry

The new EJA series of pressure/differential-pressure transmitters has been launched by Yokogawa. Incorporating their unique DPharp digital resonant sensing technology, this latest product range includes a version that is particularly suited to the oil and gas industry. The low copper housing DPharp EJA transmitter features multi-sensing capability, fast response time and its new compact design makes it significantly lighter than the stainless steel versions currently on the market, ideal for use on offshore platforms.

Typically used to measure liquid, gas, and steam flow rates as well as liquid levels in tanks, pressure transmitters are vital in maintaining safety on an oil platform, as they are essential to trigger safety shutdowns when hazardous conditions are detected. This new range from Yokogawa is the latest generation of digital pressure transmitters, adding new levels of functionality, performance and safety compared to the original EJA series, of which five million units have been shipped to customers around the world.

The new EJA series offers users within the oil and industry many new features and benefits. Firstly, the response time, the time from the detection of a pressure change to the change in the output of an electric signal, has been brought down to 90 ms, which equals the capability of Yokogawa’s premium EJX series. This faster response time will now allow the new EJA transmitters to be used in high-speed applications such as turbine surge control.

Secondly, the multi-sensing capability means that a new EJA differential pressure transmitter will be able to simultaneously measure both differential and static pressure. This means that a single new EJA differential pressure transmitter will be able to measure both the liquid level and the pressure in a tank, a function that traditionally could only be carried out using two pressure transmitters. Not only does mean it can fit in installations where space is limited, but also is a more cost-effective solution.

Thirdly, the flexible, rugged housing means that the transmitters can be mounted either vertically or horizontally and new, larger indicators on the display make it easier for oil land gas engineers to read the process variables and alarms and the intuitive display also aids in faster commissioning and maintenance.

All transmitter versions in the new EJA range comply with the International Electrotechnical Commission’s (IEC) IEC61508 standard on the functional safety of electrical/electronic devices and are suitable for use in safety integrity level (SIL) 2 applications in single mode and SIL 3 applications in dual mode. Independent certificates and reports, from both TUV and exida.com, come as standard to support this statement: a feature that is unique to Yokogawa’s DPharp sensing technology.

See also Pressure/DP Transmitters based digital resonant sensing! (28 Sept 2012)