Are there any brands of infrared analyzers that meet IEC61508 SIL2 certification?

Are you referring to an infrared analyzer for toxic and harmful gases on-site? For Drager and MSA, there are models that meet the SIL2 standard.

It’s not a alarm device; it’s a process control analyzer

Is it the design institute that requires SIL 2 level? I don’t think so; a redundant approach is probably used.

It seems you really are wealthy – having redundant analyzers; I’ve never heard of that before! Analyzers generally do not have a SIL rating, as this is difficult to achieve; analyzers are relatively complex systems with many components, they have a high failure rate, and the time required for repair and restoration is long. Making a instrument without an SIL rating redundant in order to meet the SIL rating requirements is clearly a sign of a lack of understanding regarding SIL ratings. I think the issue raised by the original poster regarding the SIL rating required for the analyzer ignores the actual technical limitations of such analyzers when conducting SIL rating analyses; it’s an assumption made without proper consideration. Simple instruments such as transmitters, valves, and SIS systems can generally meet the SIL requirements. When such requirements are indeed necessary, it is advisable to use parameters such as temperature, pressure, flow rate, and liquid level to achieve them, avoiding the use of analyzers in interlock systems.

This post was last edited by moyulong on 2016-1-27 at 16:43. Hehe, we have a device that enables online analysis of three components; the design institute designed redundant sensors for use in interlock systems. There are only three or four companies capable of developing such devices, and only one or two of them have actual experience in this area. Also, I would like to ask you whether the transmitter has SIL3 certification? What if it’s not available, and yet the system is required to meet SIL3 standards?

Private message :lol:lol:lol:lol

Send me a private message too – which specific companies are they? Are there any specific solutions in the cases you are aware of? Please provide an overview, thank you.

This post was last edited by HEJIYUER on 2016-1-31 at 21:16. I have really never seen SIL 2 in infrared or chromatography applications, nor have I used it in any safety interlock systems. In process design, efforts are made to avoid having the \"material composition\" directly involved in interlocks; instead, other indirect (peripheral) control methods are employed to achieve the desired outcome, as it is well known that interlocks based on analyzers are not reliable. For example, in PTA plants, regardless of the manufacturing process used, there is always an O2 interlock – oxygen concentration is extremely important for safety; there are often a dozen or so oxygen sensors in such plants. Most online analyzers do not have SIL parameters, but that does not mean the analysis instruments cannot be used in interlocks. IEC explanation: Analyzers with good performance in actual use can also be used in safety interlock applications when operated redundantly, which constitutes an exception. @jiaguoyun @budaoweng123

If a laser can be used, NEO has analyzers with SIL 2 certification.

Neo, what the hell? What brand? Which one**? Haven’t seen it.