Application Notes Archive

Case Study: Isolator Contamination Control at AST

Learn how AST uses PMS instruments for isolator contamination control.

Since 1965, AST has been delivering innovative solutions – many of which were industry firsts and have since become industry standards. AST has always understood that our customers serve demanding and oftentimes unpredictable markets. We also understand that “flexibility is the antidote to uncertainty,” and as your partner, AST consistently seeks to deliver innovative solutions that are robust, yet flexible.

A Review of EN ISO 17141, ISO 14698 andInstrumentation Conformance

In August 2020 the normative standard for Europe EN 17141, Cleanrooms and associated controlled environments – Biocontamination control, was issued. It essentially replaces the existing European Standards (EN) ISO 14698-1:2003 and (EN) ISO 14698-2:2003 within the European Standards community countries, and is associated with the cleanroom standard ISO 14644-1:2015, Cleanrooms and associated controlled environments – Part 1 Classification of air cleanliness by particle concentration. Globally, ISO 14698 –1&2:2003 are still valid and applicable.

A Practical Guide to Aerosol Particle Counter Matching

A common question related to aerosol particle counters is how well particle counting results should match each other. New airborne particle counters added to an existing fleet won’t always match the counts of the old. This could be as a result of different manufacturer’s, but even when the particle counters are supplied by the same manufacturer, it is not uncommon for variation to exist. In this short paper, we provide a practical guide for the expectations one should have when comparing particle count data from similar and dissimilar instruments.

20 nm Chemical Batch Sampling Solution

Particle Measuring Systems (PMS) offers the Chem 20™ as the world’s most sensitive particle sensor, propelling online particle specification down to 20 nm for the first time. The SLS-20 syringe sampler, combined with the Chem 20, provides the flexibility of offline batch sampling for a variety of applications, including process chemical research, production, distribution and packaging.