Wednesday, 03 April 2013 09:36

APM 550 EL

The APM 550 system is a manual method for sampling fine particles (PM2.5 fraction). Ambient air enters the APM 550 series samplers system through an omni-directional inlet designed to provide a clean aerodynamic cut-point for particles greater than 10 microns. Particles in the air stream finer than 10 microns proceed to a second impactor that has an aerodynamic cut-point at 2.5 microns. The air sample and fine particulates exiting from the PM2.5 impactor are passed through a 47mm diameter Teflon filter membrane that retains the fine particulate matter

APM 550 EL keeps the sampling rate  constant at 1m3/hr by a microprocessor based electronic flow controller that automatically compensates for increasing pressure drop due to dust deposit on the filter. An ambient air temperature sensor and barometric pressure sensor have been provided to automatically provide temperature and pressure correction while reporting flow rate in volumetric flow units. An additional filter pressure sensor is also provided to continuously monitor and record the filter pressure and the system terminates the sample collection if the pressure drop across the filter exceeds a safe limit.

The APM 550 EL has an in-built USB Flash memory based data logger that records Filter ID, air temperature, filter temperature, barometric pressure, flow rate, Coefficient of Variation (CV) and also totalizes and records the volume of air sampled. A PC based software is provided to download the data for audit and prepare an intelligent report highlighting all important information in a convenient graphical format.

Special features:

  • PM10 and PM2.5 Impactors as per designs standardized by USEPA
  • Microprocessor based controller maintains constant air sampling rate of 16.7 LPM
  • Microcontroller based data logger records Air Temp., Filter Temp., Filter Pressure, Barometric Pressure, Flow Rate and Air Sample Volume
  • Data Recorded in USB Memory stick
  • In-built system to control start and stop times of sampler
  • Auto Shut off of Sampler if flow rate falls below 1 m3/hr. due to filter choking
  • Large 40 Ch. X 4 line back lit LCD provides all system parameters at a glance
  • Summary of run time parameters provided at end of sample duration
  • PC based software provides intelligent report of all system parameters recorded during
  • Size Selective inlets: PM 10 Impactor and WINS Impactor for PM 2.5 conform to USEPA design
  • Flow Rate: 1 m3/hr maintained by microprocessor based electronic controller Auto shut-off of sampler if flow rate drops by more than 10% from designed value of 16.7 LPM
  • Vacuum Pump: Oil Free, non-pulsating pump driven by induction motor for stable flow rate
  • Power requirement: Nominal 220 V, Single Phase, 50Hz AC mains supply. For proper operation and safety a good earth connection is mandatory
  • Automatic Sampling: In-built system to control start and stop times of sampler
  • Volumetric flow rate compensation: Performed automatically by the system using Sensors for Ambient Temp., Barometric Pressure and Filter Pressure
  • Elapsed time indicator: Real Time clock based. Operating time for each sample in hours and minutes is recorded
  • Flow recorder: USB flash memory based system records flow rate, volume of air sampled, air temperature, filter temperature, filter pressure and barometric pressure
  • Volume Totalizer: MCU unit totalizes and displays volume of air sampled
  • Display: Large 40 Ch. X 4 line back lit LCD provides all system parameters at a glance
  • Software and reporting: PC based software provides intelligent report of all system parameters recorded during. Summary of run time parameters provided at end of sample duration
  • Warranty: One year
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