Regarding actuators, sensors, and transmitters for SIS
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The SIS system needs to be designed in accordance with the SIL level; the main system generally meets the requirements of that SIL level. However, I would like to know whether related actuators such as valves, sensors, transmitters, and other devices also need to comply with the SIL level requirements. Additionally, I would appreciate it if you could tell me which manufacturers in China produce such equipment. Thank you.
Basically, the brands that have obtained these certifications are all foreign brands, sigh.
The question is too general. For devices in the SIS system, it is required that they pass SIS certification at the time of purchase, and verification must be carried out. For example, for pressure transmitters, the highest level in the market is SIL2.
Among domestic SIL3 brands for SIS systems, there are Otoman TSxPlus, Zhongkong, and HollySys; there are many imported brands as well. There are too many brands of sensors and actuators