Apparatus for measuring the air quality

FEATURES

•  Programmable Auto-Zero
•  Programmable Auto-Span
•  Auto-ranging (1 to 100000 µm/m3)
•  Adjustable Ambient Flow Control 1-3.5 LPM
•  Internal Battery (30HRS Operation)
•  Laser-Diode Precise Optical Engine
•  Integral 47mm Analysis Filter
•  Ambient Pressure and Temperature
•  Internal Datalogger
•  PM10, PM2.5, PM1, TSP Monitoring
•  Aluminum Weatherproof Enclosure
•  Sheath-Air protected Optics
•  Completely Self-Contained
•  No Tools Filter Replacement

APPLICATIONS

•  Ambient Air Monitoring
•  Remediation Site Perimeter Monitoring
•  Indoor Air Quality Monitoring
•  Source Monitoring
•  Visibility Monitoring
•  Mobile Monitoring

DUAL TECHNOLOGY

The E-SAMPLER is a dual technology instrument that combines the unequalled realtime measurement of light scatter with the accuracy standard of filter methods. The simple filter loading process testifies to the seamless blending of both technologies. Filters can be extracted and replaced in less than one minute and filter medium can be selected based on laboratory analysis. Particulate loading on the filter does not reduce performance due to the Met One actual flow control protocol. Ambient temperature and pressure are measured and actual flow is calculated and controlled by the E-SAMPLER microprocessor independent of filter loading change.

PRINCIPLE

The E-SAMPLER provides real-time particulate measurement through near-forward light scattering. An internal rotary vane pump draws air at 1 to 3.5 LPM into the sensing chamber where it passes through visible laser light. Aerosols in the air scatter light in proportion to the particulate load in the air. Scattered light is collected by precise glass optics and focused on a PIN diode. Rugged state of the art electronics measure the intensity of the focused light and output a signal to the CPU. The output is linear to concentrations greater than 100,000 ug/m3. Every E-SAMPLER is factory calibrated using Polystyrene Latex Spheres of known index of refraction and diameter at multiple points to validate linearity.

MAINTENANCE

Each E-SAMPLER has two internal filters (not the 47mm Analysis Filter) to protect sensitive optics and prevent damage to the flow components. Both filters are accessible from the front panel. Coin slots enable these filters to be removed and checked or replaced without any tools. Filter life for both will exceed 1 year in the harshest of conditions. All E-SAMPLERs have sheath air from the internal filters that continually curtain the optics. This sheath air protection allows the E-SAMPLER to be used in adverse environments without performance degradation. Even in harsh conditions the E-SAMPLER will operate to specifications for 2 years without need of recalibration.

DATA COLLECTION AND SOFTWARE

Air SoftwareTM and Air Plus SoftwareTM are complete communications, data collection and data reporting tools. This software supports modem, radio, direct connection and the G1002 Data transfer module. Both programs generate summary reports and Air Plus provides graphic recordings and charts.

SPECIFICATIONS