Gas chromatography (GC) is an important analytical technique used to separate and analyze chemical components in a mixture. Here, we provide a brief introduction to GC and discuss some of the common application challenges and mass flow/pressure solutions. How does gas chromatography work? The sample is first injected into the inlet of the GC, where […]
Variable area flow meters, commonly known as rotameters, use the pressure of a flow stream to determine a volumetric flow measurement. The pressure causes a ball within a conical tube to float, and the height is directly correlated with the flow rate of the gas or liquid. When operating in standard fluid, temperature, and pressure […]
Measuring flow below atmospheric pressure can be challenging due to changing volumetric flow rates and pressure drop requirements. It is critical to consider operating conditions and device capabilities to ensure your flow meter gives correct readings. In this article, we will discuss the relationship between line pressure, flow rate, and pressure drop to determine the […]
Many systems require flow calibration, verification, or validation to ensure processes are running properly. When flowing one type of pure gas or gas mixture, this is fairly straightforward. However it is a bit more challenging when flowing gas mixtures with variable compositions, such as in stack gas analysis where the relative concentrations of CO2, O2, […]
Validation, verification, and calibration all share the common goal of ensuring a process is working as intended. Here, we discuss these three interrelated but distinct processes and detail how to go about validating, verifying, or calibrating your system. At a basic level, the three terms may be defined as follows: Validation ensures a system satisfies […]