Ozone Concentration Tester (CHYC-1)

1,CHYC-1 ozone concentration tester features:1) Use: test ozone concentration in water2) Testing method: Add 5ml tested ozone water into A and B cuvette respectively, add a small bag of DPD testing powder into B cuvette at the same time, water turns red at once, turn CD to compare colors of two windows, while they are at the same color, the ozone concentration in water is the data got from the reading window

2, photos of company