Grab sampling, aka "closed loop sampling", "lab sampling" or "spot sampling", is manual collection of fluid from pipelines, tanks or systems for lab analysis. Routinely analyzing representative fluid samples can:
If you want your analytical instrumentation system to give a reliable picture of the fluid in the process line, you need a good sample. If the sample gets altered anywhere in the process, the data from the analyzer won't be useful.
One challenge is that some chemicals evaporate or fractionate before arriving to a lab, unless they're kept under pressure. And if that happens, the sample isn't representative. Even a sample taken properly at the tap may fall victim to a host of problems, like:
Swagelok grab sampling systems provide solutions to satisfy gas and liquid non-slurry sampling service in a consistent, reliable package.