1. Continuous Particulate Monitoring Using Light Scatter Photometers

2. EPA Designation: None PM 2.5 Continuous Particulate Monitor for AQI, Visibility, Remediation, Mobile Monitor Indoor Air Quality Monitor for Workplace, Home Casinos. Principle of Operation: Near Forward Light Scatter Cost: Hand Held $3,000. Environmental for Outdoors $5,000. Accessories: Various PM Inlets, Filter and Foam Inserts Downloading: RS232 and Data Software Support: BGI Offices in Atlanta & Boston. USA Distributors Calibration Procedure: HEPA Filter –Zero Reference Reference Filter- Span Calibration Dynamic Dust introduced in Lab Gravimetric Filter Comparison in Field Verification: Flowrate, Zero, Span, Gravimetric Site Calibration Maintenance: Lenses – Continuous Purge Air, Recal Daily Pump 1year Battery 2 years

3. §Scattered light has components of diffraction, refraction and reflection. §Changes in the particulate reflective properties, shape and color have an effect on instruments mass response. §Gravimetric calibration is necessary to correlate to EPA PM concentration criteria. Not EPA Designated. Used as a Survey or low cost continuous ambient monitor. Diffracted Refracted Reflected Small Detection Angle

4. (Optical) Light Scatter Photometer Principle §Light Scattered by angle ß is measured. IR Light Source Photo-Detector Light Traps ß Sensing Volume

5. Microdust Photometer Design Infra Red Emitter (880nm) Infra Red Detector Light Stop Focusing Lens Focusing Optics Sample Volume

6. Clean Air Condition. (No Particles) §Infra red beam is focused onto the light trap. §No forward scattering effect. §Zero mass measurement seen by detector. §Zero calibration using a HEPA filter.

7. Particulate Introduced to Sample Volume §Beam is scattered due to the effects of diffraction, refraction and reflection. §Intensity of Infra red signal is measured by detector and directly proportional to mass. Particulate

8. Gravimetric & Respirable Adapters * Size Selective Inlets * Poly-Urethane Foam Plug Separators * Adapter for use with all commercial FRM Samplers

9. Features Full measurement range 0.001 to 2500 mg/m 3 No EPA Approval. User correlated to gravimetric sample. Improved optics and zero drift electronics DC Battery 30 hour Battery or AC Operated Scrolling display/graph of particulate concentration 4 user defined calibrations Inlets for PM 10 PM 2.5 PM 1 and TSP Low cost Hand held or Environmental enclosure

10. Microdust Ambient PM Environmental Enclosure Omni Directional Inlet Silent Operation Portable 12 Volt DC Data Logger RS232 and Software

11. Ambient Continuous Monitor §PM Inlet §Flow Controlled Pump §Purge Air §Microdust Monitor §12 Volt Battery §Data Logging §Software and Report

12. Applications n Work place and indoor monitoring. n Ambient air quality monitoring for 24 hour continuous particulate concentration n Visibility and AQI Studies n Casino Air Quality n Ambient Continuous PM Survey and Site Sampler n Roadside Monitor n Portable DC or Solar Powered n Prescribed Burns n Emergency Response n Remediation Monitor

13. Model PM950 for Continuous Ambient Monitoring Auto Zero & Span Auto Ranging EPA PM 10 FRM Inlet VSCC Cyclone Inlet for PM 2.5 Sample Flow of 16.67aLpm Rh Controller 47mm FRM Filter FRM Electronics and Data Logger

14. PM 950 Continuous Monitor

15. Summary §Proven continuous monitor technology §Comparable to gravimetric sampling §Detachable probe provides added versatility for hand-held applications §Wide measurement range with consistent results §Price and performance competitive

16. BGI Instruments §Contact us at – 58 Guinan Street Waltham, MA 02451 Telephone (781) 891-9380 Fax (781) 891-8151 info@bgiusa.com Web Catalogue www.BGIusa.com