DSC Filter Circles 934AH, 37 mm Dia, 100/pk™ (Whatman 37mm Dia, PN:1827-037)

3.7 cm (37 mm) filters are widely used for air sampling, particulate monitoring, and small-volume laboratory filtration. They are commonly placed in cassette holders for environmental testing, industrial hygiene monitoring, and aerosol collection applications.

Filters in this size are available in multiple materials such as glass fiber, quartz microfiber, cellulose, and membrane filters. Each material offers different benefits including high temperature resistance, fast flow rates, or fine particle retention depending on the application.

The 37 mm diameter is a standard size used in many air sampling cassettes and environmental monitoring systems. This compatibility allows easy integration into existing sampling setups without requiring special holders or adapters.

Certain 3.7 cm filters, such as quartz or glass microfiber versions, can withstand high temperatures up to around 500°C and are suitable for stack sampling, aerosol testing, and harsh analytical environments.

You should select 3.7 cm filters when working with compact sampling devices, limited sample volumes, or portable monitoring equipment. Their smaller size reduces sample handling and is ideal for field testing and routine environmental measurements.