- Model E-Sampler - Laser Backscatter Particulate Monitor



The E-SAMPLER is the most feature-packed light-scatter Aerosol Monitor available. Whatever your monitoring need the E-sampler will provide accurate, dependable and relevant data. 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.

  • 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

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

  • Universal Voltage Power Supply
  • Battery Charger Internal
  • 47 mm Filter Holder
  • Comet Software
  • TSP Inlet
  • Inlet Heater
  • Digital Output Cable
  • Instruction Manual

  • PM10, PM2.5, PM1 Sharp-Cut Cyclone
  • Extra 47 mm Filter Holders
  • Aluminum Tripod
  • MicroMet Software
  • Radio Modem
  • Phone Modem
  • Satellite
  • Wind Speed/Direction Sensor
  • Ambient RH
  • External Battery Cable
  • Battery


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.


The E-SAMPLER provides real-time particulate measurement through near-forward light scattering. An internal rotary vane pump draws air at 2 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 65,000 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.


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.


The E-SAMPLER is rugged, portable and easy to use. The all aluminum enclosure is not only rugged but provides electronic stability by filtering potential RF interference. Setup is a snap with the quick connect system which works with the EX-905 tripod. For other mounting applications, holes are provided to fasten to any structure. Simply turning the monitor on will start a sample using the most recent parameters. The unit will continue to operate until user intervention or battery failure. Auto-Zero and Auto-Span ensure that the data collected will be of the highest quality. Both Zero and Span can be operated manually or individu ally programmed at varying time bases (15 minutes to 24 hours). The E-SAMPLER can also be configured for start/stop times, recording periods, averaging time and other parameters.

Optional MicroMet Plus is a complete communications, data collection and data reporting tool. This software supports modem, radio, direct connection and generates summary reports as well as recordings and charts. Comet software included which provides easy to use terminal access to E-Sampler data.

  • Concentration Ranges (Auto-ranging): 0-0.5, 0-1, 0-10 0-65 mg/m3
  • Laser: 670 nm, 5 mW
  • Sensitivity :0.001mg/m3
  • Sample Period: 1 sec
  • Sample Flow Rate: 2 LPM
  • Pump Type Diaphram 10,000 hr
  • Accuracy: 8% of NIOSH 0600
  • Precision: 0.003 mg/m3 or 2% reading
  • Particle Size Sensitivity Range: 0.1-100 micron
  • Long term Stability: 5% reading
  • Sensor Type: Forward Light Scatter
  • Average Period: 1 – 60 minutes
  • Display: 4X20 LCD
  • Internal Battery (Optional): 12 VDC 12 Amp-Hr, lead acid
  • Power Consumption: 350mA (no heater), 1.1 A (w/heater)
  • Internal Battery Operation, no heater with heater: >30 Hours,  10 Hours
  • Battery Type: Lead Acid
  • Size: 10.5 (267) X 9.25, (235) X 5.7 (145) inches (mm)
  • MOI Service Period: 2 yrs
  • Programmable Auto-Zero: 15min to 24 hours
  • Programmable Auto-Span: 15min to 24 hours
  • Traceable Testing: Gravimetric
  • Sample Line Heater: Configurable RH Con trolled
  • Outputs: Analog 0-1,0-2.5, 0-5VDC, RS232
  • Data Storage Capacity: 12000 Records
  • Temperature Compensation: Standard
  • Temperature Range: -10 deg to 50 deg C
  • RH Measurement: Internal
  • Ambient Temperature: -30 deg to 50 deg C
  • Ambient Pressure: 1040 to 600 mbars
  • Alarm: Contact Closure
  • Available Cut Points: TSP,PM10, PM2.5, PM1

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