Particulates: Met One E-FRM-DC Ambient Air Sampler

The NEW and IMPROVED Met One Instruments E-FRM-DC sampler is a single-event filter sampler for the determination of daily PM2.5 or PM10 particulate concentrations in ambient air. 

The E-FRM-DC has evolved from the previous E-FRM model, now making it more versatile, with greater applications from permanent long-term sampling at a fixed site or as an audit sampler for frequent relocation in remote areas. The model E-FRM-DC is a single-event ambient air sampler designed to meet all US-EPA PM2.5 FRM specifications in accordance with 40 CFR Part 50 Appendix L.  Alternately, other sharp-cut cyclones can be installed for non-designated or indicative PM2.5 or PM1 sampling. 

Some countries do not require the full U.S. EPA FRM criteria for their PM2.5 sampling networks. These samplers may be supplied with a model BX-807 PM2.5 Sharp-Cut Cyclone instead of the VSCC cyclone or WINS Impactor.

The E-FRM-DC holds a single 47mm Teflon filter disc in a filter cassette. The cassette must be replaced by the operator for each sample. The flow rate is 16.7 L/Min. Flow data can be retrieved through any MODBUS compatible data acquisition system or can be easily downloaded and transported with your filter on a USB drive. 

The E-FRM-DC sampler folds down into its own stand for easy transportation and storage. 

Standard Accessories:

  • Main weatherproof instrument enclosure with re-designed aluminum stand
  • BX-802 EPA Pattern PM10 Inlet
  • Pass-through adapter for PM10 sampling
  • One 47mm filter cassette assembly
  • PTFE sample filters
  • Leak test valve
  • Inlet tube
  • Ambient temperature sensor with solar gill shield
  • FRM COMM Data acquisition software
  • Serial communications cable
  • Instruction manual

The E-FRM-DC is a portable, lightweight sampler suitable for use as an audit device or in a permanent installation.

Specific Details:

  • Measurement Principle: Programmable-event filter sampler for determination of particulate matter concentrations
  • Resulting Data Units: Micrograms per actual or standard cubic meter μg/m3. Calculated from lab filter weights and actual or standard sampled volumes.
  • Design Specifications: Title 40 CFR, Part 50 Appendix L
  • U.S. EPA Designations: RFPS-0315-221, RFPS-0216-231, RFPS-0316-232
  • Main Inlet Type: EPA-pattern PM10 size-selective louvered inlet standard (MOI part no. BX-802)
  • PM2.5 Separator Type: Options: BX-808 Very Sharp Cut Cyclone or BX-804 WINS Impactor
  • PM10 Sampling Config: Pass-through tube (used in place of cyclone) included for PM10 sampling.
  • Other Configurations: Compatible with PM2.5 or PM1 SCC cyclones. TSP inlet available.
  • Filter Type: 47mm PTFE disc filters standard. Other filter material types available.
  • Filter Holder: Accommodates standard EPA-pattern white Delrin filter cassettes.
  • Filter Temp Control: Filter Temp within 5°C of ambient during sampling and standby. Logged in data.
  • Operating Temperature: -30 to +50°C Ambient
  • Operating Pressure: 400 to 800 mmHg, Ambient
  • Sample Events: 24 hour samples standard. Programmable start date/time and duration.
  • Flow Rate: 16.67 L/min (1 m3/hr.). With flow sensor and real-time actual flow control.
  • Flow Accuracy: ±2% (±.33 L/min)
  • Flow Records: Flow rate, temperature, pressure logged in 5 minute intervals.
  • Vacuum Pump: Single-head diaphragm 12 VDC pump
  • Data Collection: RS-232 port (9-pin). USB data port. USB flash drive port. Software supplied.
  • Memory Capacity: 24 sample events
  • Compatible Software: FSCommAQ
  • User Interface: 4.3” graphical touch screen
  • Enclosure Type: Active fan ventilation
  • Deployed Dimensions: 2.0 meters (78.75”) high, 65.5 cm (25.75”) wide, 64.1 cm (25.25”) deep
  • Footprint Dimensions 65.5 cm (25.75”) wide, 64.1 cm (25.25”) deep
  • Weight: Sampler 33 Ib (except PM10 inlet head); Stand 10.5 Ib
  • Power: 100 to 240VAC, 33W nominal (2.75A)


  • Criteria PM Sampling
  • Audit Sampling
  • Health Studies
  • Perimeter Sampling
  • Regulatory Enforcement
  • Remote Sampling Applications

Particulates: Met One E-FRM-DC Ambient Air Sampler
Item # E-FRM-DC 

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