The Chroma now offers lower-level purity measurements – see the expert paper

We’ve enhanced the operational performance of our versatile SERVOPRO Chroma trace gas analysis to provide lower detection levels for impurities.

The Chroma uses Gas Chromatography (GC) techniques to deliver versatile gas purity measurements, and can be optimized with a choice of Servomex sensing technologies for a wide range of applications.

Depending on the process, it can be fitted with Flame Ionization Detector (FID) or Thermal Conductivity Detector (TCD) sensing technologies, or Servomex’s unique, non-depleting Plasma Emission Detector (PED) sensor.

Now, measurements made using the innovative PED offer significantly improved Lower Detection Limits (LDL) for the impurities nitrogen (N₂), hydrogen (H₂), oxygen (O₂), argon (Ar), methane, carbon monoxide, carbon dioxide (CO₂) and non-methane hydrocarbons.

These measurements can be made in a wide range of background gases, including helium, argon, N₂, O₂, H₂, and CO₂.

For example, N₂ impurities in O₂ were previously measured with an LDL of 50 parts-per-billion (ppb). The improved Chroma now offers an LDL of 5ppb for this measurement.

Similarly, measurements of O₂ in H₂ have gone from an LDL of 50ppb to 25ppb.

Dan Johnson, our Global Product Manager for Purity & Specialty, said: “The improved measurement capabilities of the Chroma offer industrial and medical gas customers industry-leading, trace-level analysis for many gas purity monitoring applications.

“Combined with its robust, Windows 10-based software and customizable hardware platform, they ensure the Chroma continues to deliver a versatile, easy-to-use solution with a low lifetime cost of ownership.”

We’ve updated our expert paper about the Chroma to show the updated performance specifications in full. Download it here.