The type of measuring instrument used for monitoring the chlorine/hydrogen pressures in the electrolyzer
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Our company has chosen the Rosemount 3051 series and Yokogawa EJA for use, but the performance has not been satisfactory – drift occurs after some time of use, and the cause cannot be identified. We now hesitate to implement a instrument safety system. May I ask everyone what measurement methods you use in your devices and how effective they are?
I can’t recommend this to you. It’s better to consult an expert. Instrument safety is very important!
During installation, make sure to check whether the gasket is pressing on the diaphragm box; when zeroing out, it must be done relative to the atmosphere.
This statement is correct: it is absolutely necessary to prevent the gasket from pressing on the diaphragm box, as this would have a significant impact on the measurement accuracy; the inner diameter of the gasket can be made slightly smaller.
It has been working very stably for us; we must keep the temperature steady. We use the EJA118 single-flange differential pressure transmitter; there is also a Siemens version, which works just fine.
Please pay attention to the impact of stray currents in the electrolyzer and magnetic field effects on the detection instruments; many manufacturers have encountered cases of false detection readings and sudden shutdowns of the electrolyzers due to interference from such stray currents. To address these issues, it is essential to focus on the grounding of the equipment and pipelines.