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EPA FRM Low Volume Air Sampler - PM10, PM2.5, PMc
The TE-Wilbur is a Federal Reference Method (FRM) low volume air sampler designed for EPA-compliant ambient particulate monitoring. Designated as FRM RFPS-0714-216 for PM10, RFPS-1014-219 for PM2.5, and RFPS-1014-220 for PMc, this sampler operates at variable flow rates from 1 to 25 SLPM and supports multiple particulate fraction collection including TSP, PM10, PM2.5, PM1, and custom size-selective configurations.
Advanced Control System
The TE-Wilbur features a 5.7-inch full-color LCD touchscreen interface powered by an industrialized programmable logic controller (PLC). The system provides intuitive menu navigation, step-by-step calibration guidance, and real-time status monitoring. Volumetric flow control utilizes an integrated mass flow meter with onboard ambient temperature and pressure sensors to maintain EPA-specified flow rates under varying environmental conditions.
The sampler includes multilingual capability (English, Spanish, Chinese), MODBUS communications for data acquisition systems, USB data download capability, and full Ethernet remote control via any compatible web browser. The zero-adjust filter exchange mechanism enables one-handed filter changes without continual adjustment to maintain leak-tight seals.
Key Specifications
- Flow Range: 0-25 liters per minute with ±3% accuracy
- Operating Temperature: -25°C to 50°C
- Power Requirements: 120/240 VAC, 50/60 Hz, 40 watts peak consumption
- Filter Media: 47 mm PTFE membrane filters
- Motor: 24-volt DC brushless motor for reduced maintenance
- Sensors: PT100 RTD temperature sensors (±0.15°C accuracy)
- Barometric Pressure: 450-1238 mmHg range with ±10 mmHg accuracy
EPA Compliance and Standards
The TE-Wilbur meets all performance requirements specified in 40 CFR Part 50, Appendix J for PM10 monitoring and 40 CFR Part 50, Appendix L for PM2.5 monitoring. The system operates at the EPA-specified flow rate of 16.67 L/min for 24-hour continuous sampling periods and includes EPA-approved size-selective inlets specified in the applicable CFR appendices.
Manufactured in an ISO 9001:2008 registered facility, the TE-Wilbur supports preprogrammed EPA sampling schedules including 1-in-3, 1-in-6, and 1-in-12 day cycles with 24-hour sampling periods. The sampler accommodates optional wind speed and direction monitoring with integrated anemometer capability.
Installation and Maintenance
The brushless motor design minimizes maintenance requirements and extends operational life compared to traditional brush-type motors. The programmable timer allows flexible sampling schedule configuration to meet specific monitoring requirements. Solar power capability is available for remote site installations where AC power is unavailable.
The zero-adjust filter exchange mechanism eliminates the need for repeated seal adjustments during filter changes, reducing operator training time and minimizing potential sampling errors. All operational parameters are continuously monitored and logged, with data retrieval available through MODBUS, USB, or Ethernet interfaces.
Applications
- National Ambient Air Quality Standards (NAAQS) compliance monitoring
- Environmental monitoring for regulatory agencies
- Fence line monitoring for industrial facilities
- Source assessment and characterization studies
- Academic and research institution air quality studies
- Enclosed environment and workplace exposure monitoring