HANNA INSTRUMENTS - HI747-25 COPPER LOW RANGE HC REAGENTS Hanna Instruments Sale! from 1000 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Hanna Instruments Checker Low Range Copper Reagents Copper Low Range Checker® HC Reagents (25 Tests) - HI747-25