Sampling Basics
Sampling Basics
Sampling is the science of safely capturing a sample from a process or a pipeline while maintaining the chemical composition during storage or transport for later analysis. Depending on the process phase, temperature, consistency, chemical makeup and other factors, there are a variety of approaches that can be used to extract a sample.
Determining the container type needed is the first decision that must be made in order to select the appropriate sampler.
| Captured Phase | Container Type | |
| Pressure-Containing | Non Pressure-Containing | |
| Liquid | ✓ Cylinder | ✓ Cylinder |
| ✕ Bottle | ✓ Bottle | |
| Vapor |
✓ Cylinder | ✓ Cylinder |
| ✕ Bottle | ✕ Bottle | |
✓ = recommended ✕ = not recommended
Another important aspect is the temperature of the system fluid. Many processes operate at elevated temperatures and can pose a hazard from direct scalding during operator interaction or from the temperature limits of seats and seals being exceeded. Swagelok recommends consideration of a sample cooler when the supply temperature exceeds 140°F (60°C.) Note that thermal safety may affect sample integrity.
Looking for a sampling system?
Just fill in the below form and we will come back at the earliest