APM 550 MFC

Ambient air enters the APM 550 MFC sampler through an omnidirectional inlet designed to provide a clear aerodynamic cut-point for particles larger than 10 microns. The air stream then passes through a WINS Impactor that retains the fraction between PM 10 and PM 2.5. The PM 10 and PM 2.5 impactors used in the APM 550 MFC are based on designs standardized by USEPA and as such the system complies with international norms for PM 2.5 Samplers.

The sampling rate is held constant at 16.7 LPM by a mass flow controller. An ambient air temperature sensor and barometric pressure sensor have been provided to automatically compensate for temperature and pressure while reporting flow rate in volumetric flow units. The APM 550MFC has an in-built data logger that records air temperature, filter temperature, flow rate, and also totalizes and records the volume of air sampled. PC-based software is provided for downloading the monitoring data.

Special features:

• PM 10 and PM 2.5 Impactors of sampler based on designs standardized by USEPA and conform to the requirements of IS:5182(part24)-2019
• Flow Control is based on Mass Flow measurements to remove errors due to pressure, and temperature changes (of both ambient air and filter).
• Auto shut off if flow rate varies from 16.7 LPM ±10% 
• Microcontroller-based datalogger records Air Temp., Filter Temp. and Flow rate.
• Windows-based software for downloading data.
• Pump Assembly in a separate cabinet to prevent loss of volatile fraction and improve portability.
• A special imported oil-free brushless vacuum pump that is practically noiseless.