Industries with the need for environmental compliance products for stationary source, mobile source and ambient monitoring rely on Prest-O-Sales & Service to provide efficient, reliable solutions. We also supply laboratories with pure gases and customized mixtures for everything from culturing micro-organisms to the calibration and operation of analytical instruments. Prest-O-Sales & Service has decades of knowledge and experience in supplying institutions and companies with high quality gas mixtures and instrument calibration and process control.

Component Raw Material
All blending source gases and liquids are qualified to ensure that they are appropriate for each specific application. Because certain impurities affect the performance or stability of the final mixture, our suppliers use special proprietary purification techniques for the removal of critical impurities.

Cylinder Preparation
Our suppliers utilize a series of computer controlled automated heating, vacuum and purge cycles to prepare both aluminum and steel cylinders. For low concentration or highly reactive components they use additional, proprietary cylinder treatment processes. By use of these unique cylinder preparation processes, we are able to supply accurate part per billion and low part per million concentration reactive gas mixtures with guaranteed stability.

Blending Systems
We and our suppliers prepare mixtures utilizing high load, high sensitivity Gravimetric Balances, Micro Balance Capillary Injection, Computerized Dynamic Blending Systems and Volumetric Manifolds. This ensures that your product mixture is produced to your exact specifications promptly, accurately and repeatedly.

Analytical Instrumentation
Mixture composition is certified analytically using a variety of highly accurate, state-of-the-art analytical instrumentation including Gas Chromatography with a variety of detectors, Fourier Transform Infrared (FTIR), Atomic Absorption (GFAA), Process Instrumentation (NDIR), chemiluminescence and gas specific process analyzers. This instrumentation is calibrated with a broad set of gas reference standards including NIST Standard Reference Materials, NTRM's and Praxair Primary Laboratory Standards. All this ensures the accuracy and traceability of the final analytical results.

Quality Assurance
Production technology combines procedures such as BAR and EPA methods, ISO certification and interlab audit programs with worldwide standards from NIST. The right procedures and the right standards help ensure the highest quality gases.