Comparator block compatible with all TF kits. Used with R-0014 Phenol Red Indicator to test for pH, and with R-0600 Orthotolidine Reagent to test for chlorine.
Comparator block compatible with all TF kits. Used with R-0014 Phenol Red Indicator to test for pH, and with R-0600 Orthotolidine Reagent to test for chlorine.