Whatman 1851-047 Filter Circles, 47mm Dia, Air Sampling Quartz QM-A, 100/pk (PN:1851-047)

Whatman QM-A quartz filters are designed for air particulate monitoring and environmental sampling. They are commonly used to collect airborne particles from sources such as stack emissions, atmospheric aerosols, and industrial exhaust streams for laboratory analysis.

Quartz microfiber filters can withstand very high temperatures, often up to around 500 °C or higher, making them ideal for applications such as combustion emission testing and flue gas analysis where standard cellulose filters would degrade.

These filters typically have a nominal particle retention of about 2.2 µm, allowing them to capture fine airborne particulates while maintaining efficient airflow during sampling procedures.

Low trace metal content helps prevent chemical interference during environmental analysis, especially when testing for sulfate, nitrate, or heavy metal contamination. This ensures more reliable results when analyzing air pollution samples.

The 47 mm diameter is a standard size used in many laboratory and field air sampling devices, including cassette-based particulate samplers and PM monitoring equipment, making the filters easy to integrate into existing environmental monitoring setups.