CHEMETS colorimetric test kits let you visually compare the color of your sample to standards using a comparator. Just break tip of ampoule in cup (included) filled with sample. Vacuum pulls sample into ampoule automatically; gently swirl to mix. Handy color comparator (included) provides accurate visual analysis. Vacuum packing keeps reagents active indefinitely.

The ammonia/nitrogen test kit has a five-month shelf life.