Table 1 Characteristics and performance metrics of the reference particulate matter analyzer: environmental GRIMM #180 dust monitor.

From: Efficient field correction of low-cost particulate matter sensors using machine learning, mixed multiplicative/additive scaling and extended calibration inputs

Parameter

Value

Measurement principle

90° light-scattering method

Measurement channels

PM10, PM2.5, and PM1

Mass-concentrations measurement range

0.1–1.500 µg/m3

Precision

± 2%

Smallest detectable particle size

0.25 μm

Light source and power

Laser diode, wavelength 685 nm Pnorm 0.5/32 mW, Pmax 60 mW (multiplex)

Measurement time

From 1 min until continuous

Dimensions

483 × 177 × 400 mm

Weight

15 kg

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