This product contains 30 self-filling CHEMets ampoules and 30 cadmium foil packs to refill kit K-6904 for the analysis of nitrate. R-6902 is compatible with C-6904 comparators.
Shelf life: 12 months
Cost per test: $1.71
$51.40
50 or more $46.26
100 or more $43.69
200 or more $41.12