Volumetric Flow Controlled (VFC) TSP particulate samplers use a critical orifice with a predetermined orifice hole diameter to control the flow rate. The critical orifice is drilled and calibrated to let only the predetermined flow rate to pass through the filter. The motor on these systems operate wide open while the critical orifice maintains a constant flow rate. These systems are available with a 7 day mechanical timer or a US EPA reccomended digital timer. These systems can be fitted with an economical brush style motor or a maintenance free brushless motor.

• Volumetric Flow Controller (VFC) maintains a constant flow rate for representative sampling
• Meets EPA CFR 40 Part 50 Appendix B for Total Suspended Particulate (TSP)
• Stainless steel filter holder for standard 8" x 10" filter paper
• Brush style motor with 44 CFM (1.24 m³/min) flow range
• 7-day mechanical timer, mechanical elapsed time indicator, and 24-hour Dickson chart recorder
• Anodized aluminum outdoor shelter for continuous 24-hour sampling
• Made in USA

General System Specifications

Physical Specifications

Available Models