1、 Execution standards

HJ/T 398-2007 "Determination of Blackness of Flue Gas from Fixed Pollution Sources - Ringman Smoke Blackness Chart Method"

2、 Purpose:

The Gelman smoke concentration map is a method of monitoring smoke based on its visual blackness. By comparing the smoke color at the outlet of the emission source with the Ringman smoke concentration map, when a certain exhaust color is close to a color block, it is considered that the smoke concentration is consistent with the blackness level of that color block.

3、 Technical indicators

1. Lingman blackness level 0-5

2. Dimensions: (110 × 40 × 3) mm

3. Each level of Ringman diagram size: (21 × 14) cm

4. Can be placed on a tripod for use or held in hand for use