Pressure Transmitter Includes Built-in SIL Safety Capabilities

May 29, 2013
Transmitters will be able to simultaneously measure differential and static pressure.

Yokogawa Corporation of America has released an enhanced version of the DPharp EJA series pressure/differential pressure transmitters. DPharp EJA series transmitters will have the same high-speed response and multi-sensing functionality available with the high-end DPharp EJX series.  .

The enhanced EJA series transmitters will be able to simultaneously measure differential and static pressure. A single enhanced EJA transmitter will thus be able to measure both the liquid level and the pressure in a tank. Previously, this could only be done with two EJA transmitters.

The response time has been brought down to 90 ms, which equals the capability of the EJX series transmitters. Specifically, this is the time from the detection of pressure to the output of an electric signal. The faster response time will now allow the enhanced EJA series transmitters to be used in high-speed applications such as turbine steam volume control.

In addition, the EJA series transmitters weigh 30 percent less and have indicators that are nearly twice the size of those on the non-enhanced version. Additionally, the optional ultra-low copper aluminum housing can provide much improved corrosion resistance over standard aluminum housings, making it a suitable alternative to 316SS for offshore environments but with more than 3 pounds of weight savings per device. The enhanced DPharp EJA series transmitters also comply with the International Electrotechnical Commission’s (IEC) IEC61508 international safety standard on the functional safety of electrical/electronic devices and are certified for use in safety integrity level (SIL) 2 applications as stipulated by the IEC. 

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