Q-CL501 Portable Colorimeter for Free Chlorine, Chlorine Dioxide (5-para) ndi zida zoyezera madzi zomwe zili ndi zida zonse zomwe muyenera kugwiritsa ntchito poyesa madzi mu labotale ndi mayeso akumunda. zomwe zimatha kuzindikira nthawi imodzi chlorine yaulere, chlorine yonse, chlorine yophatikizika, chlorine dioxide, ndi chlorine.Zimatengera njira za EPA, ndipo iliyonse yaiwo yasintha motsatana, ingowonjezerani ma reagents omwe muyenera kuyesa madzi anu ndikusintha zida zanu zoyesera madzi.