The HF scientific portable dispenser accurately delivers the correct volume of DPD reagent for free or total chlorine. It is supplied with enough DPD powder for 100 tests or in multi-packs providing 1000 tests. To use, simply invert the dispenser over sample and press the button to dispense reagent. Powder dissolves quickly in sample, leaving no messy residue behind. It is available for 5ml and 10ml sample sizes with formulations for use with HF scientific and a variety of other manufacturer’s test kits.