High Range Ammonia Comparator, 1000, 2000, 3000, 4000, 6000,

Kit comes in a plastic case and contains everything needed to perform 30 tests (except distilled water): Refill, Low and High Range Comparators, dilutor snapper cup, micro test tube, and instructions. Range: 0-1000 & 1000-10,000 ppm MDL: 100 ppm Method: Direct Nesslerization Shelf-life: Although the Nessler reagent is stable, its high alkali content attacks the glass ampoule. The resulting precipitate interferes with color comparison. The refill has a 5-month shelf life when stored in the dark and at room temperature. This shelf life can be extended by 18 months if the refill is refrigerated. *Contains mercury. Dispose according to local, state or federal laws. WARNING! This product can expose you to chemicals including mercury, which is known to the State of California to cause birth defects or other reproductive harm.  For more information go to www.P65Warnings.ca.gov .