A spin-off from the University of Mogi das Cruzes in Brazil, the company Exa-m has developed a portable hemoglobin meter to test for iron deficiency anemia in low-resource settings. The hemoglobinometer is a micro processed photometer that contains a disposable vial with Drabkin's reagent in which blood samples can be placed. The following reaction leads to reading of the hemoglobin content which is processed by a microprocessor. The results are presented in a small LCD display. The hemoglobin meter is accurate, low cost, has stable reagents that can be used over a long period of time, and uses a rechargeable battery to drive the equipment. It is meant for use by health practitioners.