The SEMTECH® PM2 is our 2nd generation on-board Particulate Mass measurement device that combines real-time and cumulative PM measurements. The real-time PM mass measurement is based on an ion mobility technique, and the cumulative PM mass measurement is based on the gravimetric method using industry standard 47 mm filter cartridges.

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SEMTECH PM2: Particulate Matter Measurement

The system is compatible with both the SEMTECH® LDV and the SEMTECH® ECOSTAR Plus. The PM2 analyzer utilizes an ejector dilution system. HEPA filtered dilution air flows into the diluter and is directed around the ejector nozzle at a high velocity. This causes a pressure drop which draws in the sample through the nozzle. The raw sample mixes with the dilution air resulting in a stable homogeneous diluted sample.

For real-time PM mass measurement, a small fraction of the homogenous diluted sample is passed through a Pegasor PPS-M electrical aerosol transducer, in which particulate matter is charged. As the charged particles exit the detection zone, their charge is measured with a sensitive electrometer. The electrometer signal is then converted to real-time PM mass concentration using a transfer function.

For cumulative PM mass measurement, the homogeneous diluted sample is directed through one of three filters. The pre- and post- filter weights provide cumulative PM mass, which is used to scale the real-time mass concentration and obtain accurate, time resolved PM mass measurement

  • Features
  • Specifications
  • US EPA 40 CFR Part 1065, Heavy Duty In Use, Alternative Method
  • Ejector dilution system
  • Traceable reference pressure and flow sensors
  • Pegasor PPS-M electrical aerosol transducer
  • Three 47 mm filter cartridges
Measurement Technique Ion mobility (Pegasor PPS-M transducer)
Minimum Particle Size 23 nm (dependent on selected trap voltage)
Maximum Particle Size 2.5 μm (dependent on measured particle size distribution)
Concentration From 1 μg/m3 to 250 mg/m3
Response Time < 0.3 seconds (Dispersed to t10-t90 ca 2.5 seconds)
Maximum Data Rate 5 Hz (high speed internal averaging)
Power Requirement 12 VDC
Power Consumption < 250 W (excluding vacuum and compressor pump)
Storage Temperature Dry -10°C to 60°C
Operating Temperature -10 to 60°C ambient
Operating Environment -10 to 45 °C ambient
0 to 90% RH
Dimensions (WxDxH) 43.6 x 31.1 x 17.7 cm
17.2” x 12.3” x 7.0"
Weight: 20kg
Data Transmission Ethernet
Interference & Susceptibility
CE Standards: ICE 61326:2002-2