Ringelmann dust density meter

Ringelmann black density meter is subject to environmental protection departments and industrial and mining enterprises for environmental pollution and energy-saving .
With small size , large view, distance measurement, fast, high precision , easy to carry and easy to operate ,All the advantages proves it is an ideal instrument for dust density monitoring .
The main parameters
magnification of telescope:10 ×
diameter of objective lens :50mm
Ringelmann dust density: 0, 1, 2, 3, 4, 5
Visual observation error :< 0.5

Alissa Ma
Midwest Group
,
Midwest, No.1, 3rd. Street, Shangdi, Haidian, Beijing, China, 100085
ext. 249