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Emissions & Analytical Solutions

From R&D to certification, you're covered!

We can help you handle certifications and audits and we are knowledgeable about regulations for both on and off highway vehicle applications.

Sierra manufacturers a full suite of diesel particulate and gaseous emissions sampling and measurement systems.  The Elite Series product family ranges from intake air and exhaust mass flow metering and gas analyzers to partial flow samplers, full-flow CVS, exhaust gas analyzers, and fuel metering. 

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BG3 Elite

Partial Flow Dilution (PFD) System

  • Transient and steady-state sampling
  • Use in place of CVS for emissions and analytical sampling
  • Sample any size or type of engine and any fuel
  • Light-duty and heavy-duty engines
  • US EPA-approved for R&D and certification work
  • Patented dilution tunnel has ultra-low particulate loss
ExhaustTrak Venturi

Direct Exhaust Mass Flow Meter

  • Go direct to the sample zone 
  • Patented pressure averaging rings for zero contamination
  • Eliminating need for chemical mass balance methods
  • Meets or exceeds US EPA 40 CFR Part 1065
  • Reduced straight length requirements
AirTrak 628S

Precision Intake & Combustion Air Flow Metering

  • 200 millisecond response time to changes in flow rates
  • High accuracy 1.0% of full scale over a broad range
  • Outstanding 100:1 turndown
  • Minimal flow blockage and low pressure drop
  • High accuracy at low idle conditions
  • Field adjustment of critical flow meter settings
  • Digital electronics, field calibration validation
Filter Weighing Chambers

Assure High Quality Filter Media Processing

  • Reduce/eliminate errors in filter weight data
  • Dual chamber "Glove Box" style design
  • Filter bar coding and scanning option
  • Designed per regulatory requirements
  • Compact ready-to-run package
Particulate Filter Holders

47mm, 70mm, and 90mm

  • We stock all filters and filter holder sizes
  • Design meets requirements of Federal Register
  • All filter holders are made of 316L stainless steel
  • Plug-and-play with BG3 partial flow sampler
  • Used in manual mode with other devices
Assure clean dilution air during sampling

Air Handling and Scrubbing

  • Eliminate dirt, water and oil from your air
  • High quality air means high quality data results
  • Custom systems available

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