Pressure transmitters

Yokogawa's new EJA series of pressure/differential-pressure transmitters, incorporating its DPharp digital resonant sensing technology, includes a version that is suited to the oil and gas industry.

The low copper housing DPharp EJA transmitter features multi-sensing capability, fast response time and its compact design is said to make the product range significantly lighter than the stainless steel versions currently on the market.

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, triggering safety shutdowns when hazardous conditions are detected. The new EJA series offers new features and benefits. For example, 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 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. This means it can fit in installations where space is limited and is also a more cost-effective solution.