manufacture digital hemoglobin meter

we are dealing in point of care equipments. we are looking to manufacture digital hemoglobin meter working on photometric principle. on one side dual led used as known light source , at definate distance blood sample kept so the known frequancy light source pass through sample and at opposite end photo detecter detect the difference in light frequency or absorption of light by sample and analog card convert this absorption in digit of hemoglobin. we are looking to hire freelancer from India only.