Research Article
Field Validation of a Public Health Particulate Matter (PHPM) Low-Cost PM2.5 Monitor and Commercial Sensors with Light Scattering Technology
Table 1
Characteristics of SI, SN, and SV type dust measuring instruments used in research.
| | Characteristics | Instrument type | | | SI | SN | SV |
| | Approximate price (US dollars) | 66.6 | 50 | 50 | | Packaging size (mm) | | | | | Product weight (g) | 251 | 93 | 86 | | Estimated PMx concentration | PM2.5 | PM2.5 | PM2.5 | | Measurement of PM2.5 concentration | | | | | (i) Measuring range (μg/m3) | 0-999 | — | 0-500 | | (ii) Resolution (μg/m3) | 1 | — | 1 | | (iii) Accuracy (μg/m3) | ±15%, 10 | — | | | Measurement method | Laser scattering | Laser scattering | PLANTOWER laser particulate matter sensor | | Display | — | — | — | | Limitation | (i) Cannot be used in environments with high concentrations of PM2.5 or greater than 999 μg/m3 | (i) Uses medical grade low current laser transmitter | (i) Cannot be used in environments with high concentrations of PM2.5 or greater than 500 μg/m3 | | (ii) Cannot be used in an environment with too high temperatures | (ii) Uses temperature and humidity compensation algorithm which ensures the accuracy of product testing | (ii) Cannot be used in an environment with too high temperatures | | (iii) Cannot be used in a humid environment | (iii) Uses a special air duct design by air intake every 30 seconds is 283 mL | (iii) Cannot be used in an environment with too high temperatures | | (iv) Use heat dissipation design which ensures that the laser transmitter 3000 h | (iv) Cannot be used in a humid environment | | (v) Cannot be used in an environment with excessive temperature | |
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