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Thumbnail Filmstrip of VFC TSP Hi-Vol Air Sampler Controller, 220V Brushless Images
The TE-10557TSP-BLX Volumetric Flow Controller (VFC) delivers precise flow control for TSP high volume air samplers operating at 220 volts with brushless motor systems. This controller uses a critical orifice with a predetermined hole diameter, calibrated in a NIST traceable lab to determine the volumetric flow rate.
Operating Principle
The motor runs wide open and as air passes through the critical orifice, the sampler runs at a predetermined flow rate. The critical orifice is drilled and calibrated to let only the predetermined flow rate to pass through the filter, while the motor operates wide open as the critical orifice maintains a constant flow rate. This design ensures consistent sampling performance throughout the 24-hour collection period required by 40 CFR Part 50, Appendix B.
TSP Sampling Compliance
The reference method for TSP is codified at 40 CFR 50, Appendix B. The high-volume samples 40-60 cubic feet per minute (ft³/min) of air with the sampling rate held constant over the sampling period. The sampler flow rate and geometry favor the collection of particles up to 25-50 µm (aerodynamic diameter), depending on wind speed and direction.
Key Specifications
- Voltage: 220V AC operation
- Motor compatibility: Brushless motor systems
- Flow rate range: 39-60 ft³/min constant sampling
- Includes: VFC orifice and look-up table
- Calibration: NIST traceable flow certification
Compatibility
This VFC is specifically designed for TSP high volume air samplers with 220V brushless motor configurations. For 110V brushless systems, use TE-10557TSP-BL. For brush-style motor systems, use TE-10557TSPX (220V) or TE-10557TSP (110V). The controller integrates with standard TSP filter holders and requires compatible 8″ × 10″ glass fiber filters meeting EPA specifications.
Applications
Essential for ambient air quality monitoring programs requiring EPA compliance for total suspended particulate measurement. Used in state and local air monitoring networks, industrial compliance monitoring, and research applications where accurate TSP data collection is required. The reference method for high volume sampling of TSP continues to be performed in accordance with the FRM described in Appendix B for lead monitoring and other regulatory requirements.