The 460122 FRM 47mm PTFE filter is essential for accurate PM2.5 air monitoring[^1]. It's specifically designed for robust performance and reliability.
The PM2.5 Air Monitoring Membrane Filters are high-purity, hydrophobic PTFE filters with a polypropylene support ring[^2]. These filters are ideal for continuous ambient air testing[^3].
The 460122 FRM is more than just a filter. It plays a vital role in environmental monitoring. I remember the first time I used it in a lab. The clarity and reliability of results were impressive. This filter is designed to meet the needs of modern air testing standards[^4]. Its thermally stable design ensures that it remains flat, preventing curling that can lead to inaccurate readings[^5]. With sequential numbering, each filter can be traced back for quality assurance.
What Makes the 460122 FRM Filter Unique?
The 460122 FRM filter stands out due to its high purity and hydrophobic properties. It is essential for anyone in environmental monitoring.
This filter is specifically built for PM2.5 monitoring. Its polypropylene support ring adds robustness, making it suitable for robotic air sampling and monitoring systems.
The use of polypropylene support rings means these filters can withstand the rigors of automated sampling. When I worked with these filters in a field test, I noticed how well they held up. The thermally stable design makes a real difference. It prevents the membrane from curling, which is vital for maintaining sample integrity. Additionally, the low tare mass allows for precise gravimetric analysis[^6]. This accuracy is crucial in environmental assessments.
Key Features of the 460122 FRM Filter
| Feature | Description |
|---|---|
| Material | High-purity hydrophobic PTFE filter membrane |
| Support Ring | Polypropylene for enhanced durability |
| Application | Designed for PM2.5 ambient air testing |
| Stability | Thermally stable design eliminates curling |
| Numbering | Sequentially numbered for traceability |
| Mass | Low tare mass for accurate weight determination |
When it comes to air quality testing, precision is non-negotiable. I have seen firsthand how important it is to have reliable materials. The 460122 FRM filter is a trusted choice among professionals. Its high-purity design ensures that the results are trustworthy and compliant with environmental standards.
Conclusion
In summary, the 460122 FRM 47mm PTFE filter is a vital tool for PM2.5 air monitoring. It combines durability, precision, and reliability for effective environmental testing.
[^1]: "TECHNICAL MEMORANDUM", https://www.epa.gov/system/files/documents/2024-01/2023_roundrobinpilot_finalreport_508.pdf. The U.S. EPA Federal Reference Method for PM2.5 specifies filter-based collection and detailed filter performance criteria for gravimetric mass determination, supporting the importance of appropriate filters in regulatory PM2.5 monitoring; it does not establish that any single catalog item is uniquely essential. Evidence role: general_support; source type: government. Supports: The 460122 FRM 47mm PTFE filter is essential for accurate PM2.5 air monitoring.. Scope note: Supports the need for compliant filters in PM2.5 monitoring, not the exclusivity or superiority of this specific product.
[^2]: "Appendix L to Part 50, Title 40 -- Reference Method for the ...", https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-50/appendix-Appendix%20L%20to%20Part%2050. EPA PM2.5 reference-method specifications describe PTFE membrane filters with support-ring, dimensional, pressure-drop, and weight-stability requirements, providing regulatory context for this filter construction; the regulation does not independently verify the purity or composition of the named 460122 FRM product. Evidence role: definition; source type: government. Supports: PM2.5 monitoring membrane filters are high-purity, hydrophobic PTFE filters with a polypropylene support ring.. Scope note: Contextual support for FRM-style filter construction, not direct product verification.
[^3]: "Instrumentation Information", https://dec.vermont.gov/air-quality/air-monitoring-section/instrumentation-information. EPA ambient-air monitoring guidance and PM2.5 reference-method materials document the use of filter-based PM2.5 samplers for ambient air monitoring, often over defined sampling periods such as 24 hours; this supports the ambient-air-testing context but does not by itself prove continuous real-time operation. Evidence role: general_support; source type: government. Supports: These filters are ideal for continuous ambient air testing.. Scope note: Supports use in ambient monitoring, while the word "continuous" may require narrower evidence or revision because FRM gravimetric sampling is commonly time-integrated rather than continuous real-time measurement.
[^4]: "AMTIC - PM2.5 Monitoring Network | US EPA", https://www.epa.gov/amtic/amtic-pm25-monitoring-network. U.S. federal PM2.5 monitoring regulations define reference-method performance and filter requirements for ambient PM2.5 measurement, showing the types of standards that compliant filters must satisfy; the source would not confirm that this particular filter model has been certified unless the model is explicitly listed or documented elsewhere. Evidence role: general_support; source type: government. Supports: This filter is designed to meet the needs of modern air testing standards.. Scope note: Supports the existence and content of relevant air-testing standards, not direct compliance of the named product.
[^5]: "Influence of environmental conditions, operational procedures ...", https://pmc.ncbi.nlm.nih.gov/articles/PMC13039807/. EPA PM2.5 gravimetric procedures emphasize filter integrity, conditioning, handling, and stable weighing conditions because physical changes in filters can affect measured mass; this supports the general mechanism linking filter stability to measurement quality, but may not specifically test curling in the 460122 FRM filter. Evidence role: mechanism; source type: government. Supports: A thermally stable design helps prevent curling that can lead to inaccurate readings.. Scope note: Mechanistic support for filter stability and weighing accuracy, not direct evidence that this product prevents curling.
[^6]: "Automatic weighing system vs. manual weighing precision ... - PMC", https://pmc.ncbi.nlm.nih.gov/articles/PMC10618374/. Gravimetric PM2.5 methods determine particulate concentration from the difference between pre- and post-sampling filter mass under controlled weighing conditions, so filter mass and weighing uncertainty are directly relevant to analytical precision; this supports the measurement principle but does not quantify the precision of the named filter. Evidence role: mechanism; source type: paper. Supports: Low tare mass allows for precise gravimetric analysis.. Scope note: Supports the gravimetric mechanism generally, not a measured precision advantage for this specific product.
