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Alphasense OPC-R2

General Description

The Alphasense OPC-R2 sensor is an optical particle counter that provides real-time measurements of PM1.0, PM2.5 and PM10 mass concentrations and environmental parameters such as temperature and relative humidity.

Principle of Operation

The Alphasense OPC-R2 raw PM sensor uses laser beams to detect particles from 0.30 to 12.4 µm in diameter with 16 software bins. Count measurements are converted into mass concentrations of PM1.0, PM2.5 & PM10 using embedded algorithms.


  • Dimensions: 72 (L) x 21.5 (W) x 25.5 (H) mm
  • Weight: <30 g
  • Battery: N/A
  • Power supply: 5 VDC, 100 mA
  • Sensor lifetime: N/A
  • Clock function: No
  • Sampling mechanism: Fan
  • Environmental operating conditions: -10 to 40 °C, 0 to 95 % RH, non-condensing
  • Internal data logging: No
  • Data communication/retrieval: data can be retrieved on PC using the data acquisition interface with software provided by Alphasense via USB cable 
  • Weatherproof: No


  • Urban, outdoor and indoor air quality

Manufacturer's product webpage

    South Coast Air Quality Management District

    21865 Copley Dr, Diamond Bar, CA 91765



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