Field Validation of a Public Health Particulate Matter (PHPM) Low-Cost PM_2.5 Monitor and Commercial Sensors with Light Scattering Technology

Table 2

Characteristics of SC, CKDPM, and PHPM type dust measuring instruments used in research.

Characteristics	Instrument type
	SC	CKDPM	PHPM
Approximate price (US dollars)	23.3	66.6	23.0
Packaging size (mm)
Product weight (g)	86	180	150
Estimated PMx concentration	PM2.5	PM2.5, PM10, PM1	PM2.5
Measurement of PM2.5 concentration
(i) Measuring range (μg/m^3)	—	0-500	0-500
(ii) Resolution (μg/m^3)	—	1	1
(iii) Accuracy (μg/m^3)	—
Measurement method	—	Laser scattering	Laser scattering
Display	LED digital display	LED digital display	LED digital display
Limitation	(i) Cannot be used in an environment with too high temperatures	(i) Cannot be used in environments with high concentrations of PM2.5 or greater than 500 μg/m^3	(i) Cannot be used in environments with high concentrations of PM2.5 or greater than 500 μg/m^3
	(ii) Cannot be used in a humid environment	(ii) Cannot be used in an environment with too high temperature	(ii) Cannot be used in an environment with too high temperature
		(iii) Cannot be used in a humid environment	(iii) Cannot be used in a humid environment

Note: CKDPM type dust detector is a dust meter supported by the Chronic Kidney Disease Prevention and Slowing Project in the Northeast (CKDNET) sampler.